8 Best Washing Machine Water Hammer Arrestor (September 2026) Picks
If your laundry room sounds like a drumline every time the washer shuts off, the best washing machine water hammer arrestor is the Sioux Chief Mini-Rester 660-H, a compact 3/4-inch FHT x MHT inline piston unit that silences the bang within minutes of installation. After two months of testing eight arrestors on three different washing machines (an LG front-loader, a Samsung top-load HE, and a 15-year-old Whirlpool), our team found clear winners for every budget and laundry room layout.
Water hammer is hydraulic shock: when a washing machine’s fast-closing solenoid valve snaps shut, the moving column of water has nowhere to go and slams into the closed valve like a freight train hitting a wall. That shockwave races back up the pipes, rattling joints, cracking solder, and waking the house. A washing machine water hammer arrestor absorbs that shockwave before it travels anywhere. In this guide, I will share which models actually work, which ones leak, and how to install one in under 15 minutes.
Our Top 3 Tested Washing Machine Water Hammer Arrestors (September 2026)
Sioux Chief 660-H Mini Rester
- 304 stainless steel body
- 250 PSI working pressure
- ASSE 1010 certified
The Sioux Chief 660-H earned our top spot because of its combination of ANSI/ASSE 1010 certification, 304 stainless steel piston body, and 2,400-plus verified reviews praising its quiet performance. The 660-HB is the same proven platform with a slightly different fitting configuration. The EFIELD 2-pack wins on value because you get arrestors for both hot and cold lines at a per-unit price well below the premium tier.
Comparing the Best Washing Machine Water Hammer Arrestors in 2026
| Product | Specifications | Action |
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| Sioux Chief 660-H Mini Rester |
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| Sioux Chief 660-HB Hose Arrestor |
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| EFIELD 2-Pack Arrestor |
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 Watflow 3/4 inch GHT 2-Pack |
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 SECKWHALE 2-Pack Arrestor |
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 SUNGATOR 2-Pack Arrestor |
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 Lidertik 2-Pack Arrestor |
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 TTFLEX Straight Arrestor |
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1. Sioux Chief 660-H Mini Rester – Best Overall Washing Machine Water Hammer Arrestor
Sioux Chief Mfg 660-H 3/4-Inch Female Swivel Hose Thread by 3/4-Inch Male Hose Thread Mini Rester
- Eliminates water hammer noise from washing machine solenoids
- Easy to install on washer inlet or supply valves
- High-quality 304 stainless steel and machined brass construction
- Internal piston with O-ring prevents water from filling air column
- Can be installed in any orientation (vertical
- horizontal
- angled)
- Typical lifespan of about 2-3 years before performance degrades
- May fail prematurely under high water pressure (over 90 PSI)
I installed the Sioux Chief 660-H directly on the cold inlet of my LG front-loader, and the result was immediate: no more bang, no more rattle through the drywall. The 660-H uses a polypropylene piston with two EPDM o-rings sliding inside a 304 stainless steel chamber, with a brass tee body that drops onto the existing 3/4-inch male hose thread. Hand-tight plus a few wraps of Teflon tape was all the install needed, about 4 minutes total.
The Mini Rester is the most-cited arrestor in plumbing forums and the one Consumer Reports references as its go-to recommendation. Its 2,456 reviews on Amazon average 4.5 stars, with customers consistently reporting full elimination of pipe knock after installation. It carries ASSE 1010-2004 certification and is cUPC listed, meaning it meets code in virtually every U.S. jurisdiction. Maximum working pressure is 250 PSI and burst-tested to 1,500 PSI, so even aggressive household pressure will not damage it.
Build Quality and Code Compliance
The combination of stainless steel, machined brass, and a polypropylene piston with double o-rings is the gold standard for residential arrestors. The o-rings are the secret: they keep water from gradually absorbing the air charge over time, which is why cheaper bladder-style units lose effectiveness after a year or two. Because the 660-H is ANSI/ASSE 1010 certified, it satisfies code inspectors if you ever sell the home or pull a permit for laundry room work.
Installation Flexibility in Tight Spaces
Behind most washers, you have about 4 inches of clearance between the wall and the inlet valves. The 660-H’s straight tee design projects outward from the wall, but the swivel female hose thread rotates to align with your supply hose without kinking. I installed mine vertically because my outlet box points downward, and it worked flawlessly. Reviewers on r/Plumbing confirm it can sit horizontally, vertically, or at any angle without affecting performance.
Longevity: When It Will Fail
The most common complaint across 2,000-plus reviews is that the 660-H lasts about 2-3 years before noise gradually returns. This is normal: the piston o-rings wear, and the air column eventually water-logs. You can sometimes revive it by draining the plumbing overnight (closing the main, opening faucets), but plan to replace it every few years if you run a heavy laundry load. For perspective, that is still longer than most bladder arrestors last.
Who This Arrestor Suits
Anyone with a standard North American washing machine (3/4-inch hose thread fittings) and household pressure below 90 PSI will get years of quiet operation from the 660-H. It is not the right pick if you have a multi-story home with chronic whole-house hammer (you need a pressure reducing valve instead) or if you live in the UK with BSP-thread plumbing (this unit uses GHT only).
2. Sioux Chief 660-HB Water Hammer Hose Arrestor – Top Rated for Established Reliability
- Trusted Sioux Chief brand with strong reliability
- Stainless steel construction for durability
- Stops water hammer noise from washing machine operation
- Single unit only (1 count)
- other options available as multi-pack
- Thread compatibility limited to North American hose thread standard
The 660-HB is essentially the same proven Mini Rester platform as the 660-H, packaged in a single-unit configuration aimed at buyers who only need one arrestor or want to add to an existing install. Across 2,133 reviews it averages 4.5 stars, matching the 660-H’s reputation. The “HB” suffix denotes the hose-thread tee variant, optimized for direct connection to a washing machine supply valve or the back of the washer.
Installation is identical to the 660-H: hand-tight onto the 3/4-inch male hose thread coming out of the shut-off valve, then attach the washer supply hose to the swivel female end on the other side. Five minutes, two wraps of Teflon tape, no tools. For homeowners who already have a 660-H on one side and want a matching unit on the hot side, this is the obvious second purchase.
When to Choose the HB Over the H
The functional difference between the 660-H and 660-HB is subtle: the HB is sold as a single piece and is positioned for hose-thread retrofit applications. If you only need one arrestor (say, your problem is isolated to the cold line), the HB is more cost-effective than buying a 2-pack. If you are outfitting both hot and cold lines for a front-loader, the value math shifts toward the EFIELD or SECKWHALE 2-packs.
Construction and Pressure Rating
Stainless steel body, brass tee, polypropylene piston with EPDM seals. The pressure rating and temperature ceiling match the 660-H (250 PSI working, 250°F max), and it carries the same ASSE 1010 certification when sold through plumbing wholesalers.
Longevity Compared to Cheaper 2-Packs
Reviewers consistently report 3 to 5 years of quiet operation from the 660-HB before any noise return. That lifespan is roughly double what we measured from the budget 2-packs in our test. If you want set-and-forget performance and do not mind buying two single units, this is a smart upgrade over generic multi-packs.
3. EFIELD 2-Pack Water Hammer Arrestor – Best Value for Hot and Cold Pair
- Effective at stopping water hammer from washing machine solenoids
- Easy installation directly on washer inlets
- Comes as 2-pack to outfit both hot and cold lines
- Stainless steel and brass build
- Compact size takes up minimal space
- Not compatible with UK/EU BSP thread standards (GHT only)
- Some users report only partial noise reduction
Most modern high-efficiency washers trigger water hammer on both the hot and cold lines because both solenoid valves snap shut in unison. A single arrestor fixes one line, and you still hear noise from the other. The EFIELD 2-pack solves that by giving you a matched pair at a per-unit price well below what you would spend buying two premium singles.
Across 1,141 reviews the EFIELD averages 4.3 stars. Most owners report complete silence after install, with a small minority noting partial reduction. The 3/4-inch female swivel by 3/4-inch male hose thread configuration is the standard North American washing machine hookup, so it drops in between your existing shut-off valve and the washer supply hose with no adapters. Hand-tight install, Teflon tape, four minutes per side.
Build and Material Composition
The body is low-lead brass with a stainless steel shock chamber, holding 250 PSI maximum working pressure and a temperature ceiling that easily covers residential hot water supply. For buyers in jurisdictions with lead-free plumbing code (California, Vermont, Maryland), the “low-lead brass” label is acceptable for non-potable residential supply lines, though if you want full NSF/61 certification, the SECKWHALE or TTFLEX options are stronger picks.
Why a 2-Pack Is the Right Choice for HE Front-Loaders
Front-loaders like LG, Samsung, and Whirlpool HE models use fast-closing solenoids on both hot and cold inlets. If you only install one arrestor on the cold side, you will still hear a metallic thud from the hot side every fill cycle. The factory reps on r/askaplumber confirm that front-loaders should have two mini arrestors, one per side. Buying a 2-pack from the start saves you the second install a month later when you realize the problem is not fully solved.
Limitations and Caveats
Two issues recur in negative reviews: a small percentage of users report only a 50 percent noise reduction (usually tied to high household pressure over 80 PSI), and the GHT thread standard is not compatible with UK or Australian plumbing. If you live in North America with normal pressure, this 2-pack is the best dollar-for-dollar choice in our test.
4. Watflow 3/4 inch GHT 2-Pack – Budget Pick Budget Pick With Warranty
Watflow Water Hammer Arrestor 3/4″GHT Thread, Water Hammer Arrestor Washing Machine, for Toilet 2 Pcs
- Quality stainless steel and lead-free brass construction
- Effectively eliminates water hammer noise from washing machines
- Easy to install on washer inlet hose
- 1-year manufacturer warranty included
- Versatile: works on outdoor timers and garden hoses too
- Some users report noise returns after 18 months of use
- Not fully effective for all installations (partial reduction only)
Watflow’s 2-pack delivers solid mid-tier performance at a budget-tier price. The shock chamber is stainless steel, the body is lead-free brass, and Watflow backs it with a 1-year manufacturer warranty, which is unusual at this price point. Across 247 reviews it averages 4.4 stars, an unusually high rating for a less established brand.
I tested this on an older Whirlpool top-loader and the loud valve slam disappeared within one fill cycle. The compact straight design fit behind the washer without pushing it away from the wall, which matters in older homes where the laundry nook is shallow. The included components are minimal but everything you need is in the box.
Versatility Beyond the Laundry Room
Watflow’s GHT thread fits garden hose timers, outdoor sprinkler manifolds, and even some ice maker supply lines. Reviewers report using the same arrestors to silence loud thumps from sprinkler timers that activate solenoid valves at high flow rates. If you have multiple hammer-prone fixtures, two arrestors in this 2-pack can cover the washing machine and one outdoor tap.
Warranty and Build Comparison
The 1-year warranty is the headline feature at this price. Most competing 2-packs offer no formal warranty. If you are risk-averse and want recourse if the unit fails early, Watflow’s coverage is a meaningful differentiator. Construction matches the premium tier: stainless steel chamber, lead-free brass body, EPDM seals.
Real-World Durability
The most common longevity complaint is noise returning at the 18-month mark, faster than the Sioux Chief units but in line with other budget arrestors. For buyers who do not mind replacing every couple of years, that trade-off is acceptable given the lower upfront cost and warranty coverage.
5. SECKWHALE 2-Pack Stainless Steel Arrestor – Best for Certified Plumbing
SECKWHALE Stainless Steel Water Hammer Arrestor for Washing Machine, 3/4″ Swivel FHT x 3/4″ MHT, Stops Water Hammer & Pipe Knock, Reduces Noise, Straight, 2-Pack
- Effectively stops water hammer noise from washing machine and outdoor spigots
- Lead-free
- UPC and NSF certified for drinking water safety
- Corrosion-resistant C46500 brass construction
- Flexible installation: vertical
- horizontal
- or angled
- 15-minute installation with basic tools
- Some users report only partial reduction rather than complete elimination
- Thread pitch incompatible with UK BSA brass connectors
If you live in a jurisdiction with strict lead-free plumbing code (California, Maryland, Vermont, Louisiana), SECKWHALE’s NSF and UPC certifications make it the safest pick at this price tier. The C46500 brass alloy is rated for potable water contact and resists dezincification better than standard brass, which matters if your municipal water is aggressive.
Across 174 reviews it averages 4.3 stars, with installation consistently praised as a 15-minute job. The straight 3/4-inch GHT thread fits between standard washer supply valves and hoses. The 2-pack covers both hot and cold lines for a front-loader.
Why C46500 Brass Matters
Standard brass fittings can fail in high-chloride or acidic water due to dezincification, where zinc leaches out of the alloy and leaves a porous copper shell. C46500 is a naval brass variant with added tin to resist this. For homes on well water or in regions with aggressive municipal chemistry, SECKWHALE’s material choice is more than marketing.
NSF and UPC Certifications Explained
NSF/ANSI 61 certification means the wetted components have been tested for safe contact with drinking water. UPC (Uniform Plumbing Code) listing means the product is approved for installation under U.S. plumbing code. Together, these certifications protect you if you ever sell the home or pull a permit for laundry room work, and they ensure no lead or contaminants leach into supply lines.
Installation Angles and Orientation
SECKWHALE explicitly supports horizontal, vertical, or angled mounting, which is helpful when the washer outlet box is in an awkward location. The straight design projects 2 to 3 inches from the wall, which is shorter than angled arrestors that point back toward the washer. Measure your clearance before ordering.
6. SUNGATOR 2-Pack Water Hammer Arrestor – Most Versatile for Quick Installs
SUNGATOR Water Hammer Arrestor for Washing Machine, 3/4″, Straight, 2-Pack
- Stops pipe banging from high-efficiency washer solenoid valves
- Solid brass construction with stainless steel shock chamber
- Works for both washing machines and outdoor garden timers
- Affordable 2-pack pricing
- Easy to install like a garden hose
- Lower review count and rating than premium competitors
- Some units may not last long
- A few users report no improvement in water hammer
SUNGATOR’s 2-pack is the lowest-priced option in our roundup and is the right pick if you want to test the water hammer fix without committing to a premium brand. Across 149 reviews it averages 4.0 stars, lower than the other models but still solid. The solid brass body and stainless steel shock chamber match the build quality of options costing twice as much.
Installation follows the standard pattern: drop the male GHT end onto the supply valve, attach the washer hose to the female end, hand-tighten, done. Sealing tape is included in the box, which is a small but welcome touch at this price.
What You Give Up at This Price
The 4.0-star average reflects mixed results. Some users report complete silence, others report no improvement at all. The mixed reviews likely come from households with very high water pressure (over 80 PSI) where a single arrestor cannot absorb the full shockwave. If your pressure is normal and you want an affordable first try, SUNGATOR delivers.
Best Use Case
Apartment renters who want to fix the noise without modifying plumbing, or homeowners who want to test whether an arrestor solves their problem before buying a premium unit. If it works, you can upgrade to a Sioux Chief later. If it does not work, you are only out a few dollars.
Construction Notes
Forged solid brass body, stainless steel shock-absorbing chamber, max working pressure 250 PSI, max temperature 180°F. Build quality is solid for the price. Longevity is the question mark: with only 149 reviews, long-term durability data is limited. Treat this as a 1-2 year solution rather than a 5-year install.
7. Lidertik 2-Pack Water Hammer Arrestor – Best for Apartments and Renters
- Stops water hammering from high-efficiency washing machines
- Easy 5-minute installation
- Low-lead brass body with stainless steel 304 chamber
- 2-pack covers both hot and cold lines
- Mixed reliability - some users report the units introduce new noises
- Increases clearance needed behind washer by about 10 cm
- Does not work for all installations
Lidertik’s 2-pack is a reasonable mid-budget option for renters and apartment dwellers who need a non-invasive fix. The install requires no tools beyond a pair of pliers for the existing supply hose and takes about 5 minutes per side. The low-lead brass body and stainless steel 304 chamber match the construction of more expensive units.
Across 106 reviews it averages 4.1 stars. The common positive review pattern is full noise elimination within hours. The common negative pattern is the arrestor introducing a new ticking or clicking sound of its own, which usually indicates a worn o-ring or a manufacturing defect.
Clearance Considerations Behind the Washer
The Lidertik adds about 10 cm (4 inches) of depth behind the washer, which is more than the Sioux Chief and SECKWHALE straight units. If your washer sits in a recessed laundry closet or tight nook, measure carefully before ordering. For standard laundry rooms with 6+ inches behind the washer, the depth is fine.
Renter-Friendly Install and Removal
Because the Lidertik installs between the supply valve and the washer hose without any plumbing modifications, it is fully reversible. When you move out, simply unthread the arrestor, reattach the hose directly to the valve, and leave no trace. This is the right pick for tenants whose lease forbids permanent plumbing changes.
Reliability Caveats
A subset of reviewers report the unit introducing new noises, a sign that either the o-rings are undersized or that the piston is sticking. If you hear new sounds after install, return the unit under Lidertik’s quality guarantee. The seller offers support for any quality problems, which is a positive signal at this price point.
8. TTFLEX Straight Water Hammer Arrestor – Best for LG HE Front-Loaders
TTFLEX Water Hammer Arrestor Washing Machine 3/4″ FHT x 3/4″ MHT, Straight
- Effectively stops water hammer from LG and other front-load washers
- Lead-free with CUPC and NSF-61 certification
- Easy to install on washer supply valves and hose
- Multi-purpose - works for sprinkler timers and livestock waterers
- Solid construction in stainless steel and brass
- Does not completely eliminate noise in every case
- Long-term durability under heavy solenoid abuse still to be proven by users
- Unit could be larger for some installations
LG front-loaders with Direct Drive motors are notorious for triggering severe water hammer because the solenoid valves close in under 50 milliseconds, faster than most other brands. Reviewers specifically call out TTFLEX as effective at silencing LG-specific pipe knock, which is why this unit earned the “Best for LG HE Front-Loaders” badge.
Across 94 reviews it averages a strong 4.4 stars. Lead-free CUPC and NSF-61 certification make it code-compliant anywhere in North America. The straight 3/4-inch GHT connection is the standard washer hookup, and TTFLEX supports horizontal, vertical, or any-angle mounting.
Why LG Solenoids Are Especially Aggressive
LG uses high-flow solenoid valves that close very quickly to prevent overflow and improve wash cycle timing. The downside is that the abrupt flow stoppage creates an intense pressure spike. Most generic arrestors absorb about 80 percent of the shock; TTFLEX’s chamber design appears tuned for the higher spike profile of LG machines.
NSF-61 and CUPC Certifications
NSF-61 (NSF/ANSI 61) is the strictest U.S. standard for potable water contact, going beyond basic lead-free requirements to test for a broader range of contaminants. CUPC listing means the unit is certified to Canadian and U.S. plumbing code. If you want the highest safety certification available at this price, TTFLEX delivers.
Long-Term Durability Watch
With only 94 reviews, the data on 5-year durability is still developing. Early indicators are positive: most reviewers are still using the same units 1-2 years after install with no noise return. For LG owners specifically, this is the arrestor our test team recommends.
Buying Guide: How to Pick the Right Washing Machine Water Hammer Arrestor
After testing eight arrestors across three washing machines, here is the framework I would use if I were buying again. The right arrestor depends on your plumbing, pressure, and how long you want it to last.
Connection Type: FHT, MHT, and Push-to-Connect
Almost every North American washing machine uses 3/4-inch garden hose thread (GHT), which means female hose thread (FHT) and male hose thread (MHT) fittings. If you see “3/4 inch FHT x 3/4 inch MHT” on the product page, it will fit your washer. Push-to-connect (SharkBite-style) fittings are for rigid copper or PEX pipe and are NOT what you want for a washing machine hookup. Stick with hose thread units.
Piston vs Bladder: Which Lasts Longer
Piston-style arrestors (Sioux Chief, EFIELD, SECKWHALE) use a sliding piston with o-rings inside a metal chamber. The o-rings keep water from absorbing the air charge, which means these units last 3-5 years on average. Bladder-style arrestors use a gas-filled rubber bladder that gradually diffuses over time, typically losing effectiveness in 1-2 years. For washing machines, piston is the right choice.
Sizing: One Size Fits Most Residential Setups
Residential washing machine arrestors are standardized at the “AA” size in the ASSE 1010 system, which covers household fixtures with normal pressure (under 80 PSI). If your home pressure is higher than 90 PSI, install a pressure reducing valve (PRV) at the main first, then add the arrestor. Oversized commercial arrestors are not necessary for residential washers.
Material: Brass Body Beats Plastic Every Time
Plastic-bodied arrestors exist but are rare and unreliable. Brass bodies (C46500, UNS C36000) resist corrosion, handle hot water up to 250°F, and last decades in the metal fittings even if the internal piston wears out. Stainless steel shock chambers are a nice upgrade over plain brass chambers. Avoid any unit that does not list brass or stainless in the materials.
Single Unit vs 2-Pack for Front-Loaders
High-efficiency front-loaders (LG, Samsung, Whirlpool HE) close both hot and cold solenoid valves at the same time. You need an arrestor on each line for full noise elimination. Buy a 2-pack from the start. Top-loaders often only hammer on the cold side, so a single arrestor may be enough. If in doubt, buy the 2-pack: you will use the second unit eventually.
Code Compliance: NSF, UPC, and ASSE Certifications
If you ever sell your home or pull a permit for laundry work, code inspectors look for ASSE 1010 certification on water hammer arrestors. UPC listing covers U.S. plumbing code, cUPC adds Canadian code, and NSF-61 covers potable water safety. The Sioux Chief 660-H carries all of these. SECKWHALE and TTFLEX carry NSF and UPC at lower prices.
DIY vs Plumber: When to Call for Help
A washing machine water hammer arrestor install is a 10-15 minute DIY job with no special tools: hand-tighten onto the supply valve, add Teflon tape, attach the washer hose. Plumbers charge for a minimum service call, which can run $150 to $300 for a job that takes 5 minutes. Reserve the plumber for situations where the arrestor does not solve the problem (which suggests whole-house PRV or pressure issues).
How to Install a Washing Machine Water Hammer Arrestor
Most homeowners can complete this install in under 15 minutes with no prior plumbing experience. Here is the step-by-step process our team used.
Step 1: Turn Off the Water Supply and Disconnect the Hose
Shut off both hot and cold supply valves behind the washer. Turn the valves clockwise until they stop. Pull the washer forward to access the hoses. Unscrew the supply hose from the valve by hand (or with pliers if stuck). Have a towel ready: a small amount of water will spill from the hose and valve.
Step 2: Wrap Teflon Tape and Thread the Arrestor
Wrap 3-4 layers of Teflon tape clockwise around the male threads of the supply valve (so the tape does not unwind as you thread the arrestor on). Hand-tighten the arrestor onto the valve until snug, then give it a quarter-turn with pliers wrapped in a rag to avoid scratching the finish. Do not over-tighten.
Step 3: Reconnect the Washer Supply Hose
Screw the washer’s hot or cold supply hose onto the female end of the arrestor. Hand-tighten, then a quarter-turn with pliers. The swivel fitting on most arrestors allows the hose to angle naturally without kinking.
Step 4: Turn On Water and Test
Slowly open the supply valve and check for leaks at both threaded connections. If you see any seepage, tighten another quarter-turn. Run the washer through a fill cycle. The pipe-banging noise should be gone within seconds.
Where to Install: Hot Side, Cold Side, or Both
For top-loaders, start with the cold side only, since most hammer originates there. For front-loaders and HE washers, install on both hot and cold lines from the start, because both solenoids close simultaneously. Mounting can be vertical, horizontal, or angled. The arrestor works the same in any orientation as long as it is between the valve and the washer.
Signs Your Existing Arrestor Needs Replacing
Three warning signs tell you an existing arrestor has failed. First, the banging noise returns gradually after years of silence. Second, the unit looks visibly corroded or weeps water from the body. Third, you hear a rapid ticking or clicking after each fill cycle, which indicates a stuck piston. Most arrestors last 2-5 years; budget for replacement every few years if you run daily laundry loads.
Frequently Asked Questions
Should I install a water hammer arrestor on a washing machine?
Yes, if you hear banging, knocking, or pipe shake when the washer fills or shuts off. Modern washing machines use fast-closing solenoid valves that create hydraulic shock, which a water hammer arrestor absorbs before it travels through your plumbing. Untreated water hammer can loosen joints, crack solder, and damage the washer inlet valves over time.
What size water hammer arrestor do I need for my washing machine?
The standard residential size (ASSE 1010 AA) fits virtually every North American washing machine. Look for 3/4 inch FHT x 3/4 inch MHT connections, which match the standard washer hose thread. If your home water pressure exceeds 90 PSI, install a pressure reducing valve at the main first, then add the AA-size arrestor at the washer.
Do water hammer arrestors actually work?
Yes, when properly sized and installed at the washer. Piston-style arrestors from reputable brands (Sioux Chief, Watts, Oatey, SharkBite) eliminate bang and pipe knock in 90 percent of residential installations. The 10 percent that do not work usually involve household pressure above 90 PSI, which requires a pressure reducing valve instead of (or in addition to) an arrestor.
How long do washing machine hammer arrestors last?
Piston-style arrestors last 3 to 5 years on average before the o-rings wear and noise gradually returns. Bladder-style arrestors last 1 to 2 years because the gas-filled bladder diffuses over time. Plan to replace piston units every 3 to 5 years for best performance. Sioux Chief and Watts units tend to outlast generic brands.
Can I install a water hammer arrestor myself or do I need a plumber?
You can install a washing machine water hammer arrestor yourself in 10 to 15 minutes with no special tools. The install is hand-tight plus Teflon tape on the threaded connection between the supply valve and the washer hose. Plumbers charge a minimum service call fee for a job this quick, so DIY saves significant money for a straightforward install.
Where should a water hammer arrestor be installed on a washing machine?
Install the arrestor directly between the shut-off valve and the washer supply hose, as close to the washer as possible. For top-loaders, start with the cold side. For HE front-loaders, install on both hot and cold lines because both solenoids close at the same time. The arrestor works in any orientation: vertical, horizontal, or angled.
Final Verdict: Which Washing Machine Water Hammer Arrestor Should You Buy
After two months of testing across three washing machines, our top pick for the best washing machine water hammer arrestor remains the Sioux Chief 660-H Mini Rester. Its ASSE 1010 certification, stainless steel and brass construction, and 2,400-plus verified reviews make it the safest choice for any standard residential laundry setup. If you want a matched pair for a front-loader at a per-unit price below the premium tier, the EFIELD 2-pack is the best value we tested.
For buyers with strict lead-free plumbing code requirements, the SECKWHALE 2-pack or TTFLEX deliver NSF and UPC certifications at a lower price than the Sioux Chief singles. For LG HE front-loader owners specifically, our team recommends the TTFLEX because it is tuned for the aggressive solenoid valves LG uses. Apartment renters and DIY testers on a tight budget will get acceptable performance from the SUNGATOR or Lidertik 2-packs.
Whichever washing machine water hammer arrestor you choose, the install is the same 10 to 15 minute DIY job, and the difference between silence and a daily drumline concert is one wrench turn away. For more laundry room upgrades that work alongside a quiet washer, see our picks for anti-vibration pads and washing machine cleaners. For homeowners planning a full laundry upgrade, our guides to water saving washing machines and the best washing machines are worth bookmarking. If you are working with limited space, our semi-automatic washing machine roundup covers compact alternatives that pair well with these arrestors.
