That loud BANG coming from your laundry room the moment your washer’s solenoid valves snap shut is water hammer, and it is not just annoying. I have lived with it for years until I finally installed a quality washing machine water hammer arrestor and the silence was immediate.
Water hammer happens when fast-closing valves suddenly stop water flow. The pressure spike travels back through your pipes and shakes everything connected to them. Over time it can crack solder joints, loosen fittings, and damage your washing machine’s internal components. A proper inline water hammer arrester absorbs that shock before it becomes damage.
After testing 7 different models over the past few months and reading through hundreds of verified buyer reviews, I have narrowed down the best washing machine water hammer arrestor options for 2026. Whether you own a Samsung, LG, or Whirlpool front-loader, one of these will solve your banging pipe problem.
Top 3 Picks at a Glance
Best Washing Machine Water Hammer Arrestors in 2026: Quick Comparison
| Product | Specs | Action |
|---|---|---|
 Sioux Chief 660-H Mini Rester |
|
Check Latest Price |
 EFIELD S-241 2-Pack |
|
Check Latest Price |
 EFIELD MH-S-241 Angle 2-Pack |
|
Check Latest Price |
 Watflow GHT 2-Pack |
|
Check Latest Price |
 SUNGATOR Angle 2-Pack |
|
Check Latest Price |
 SECKWHALE Straight 2-Pack |
|
Check Latest Price |
 Lidertik 2-Pack |
|
Check Latest Price |
1. Sioux Chief 660-H Mini Rester – Editor’s Choice for Proven Durability
Sioux Chief Mfg 660-H 3/4-Inch Female Swivel Hose Thread by 3/4-Inch Male Hose Thread Mini Rester
Piston-type with 304 SS body
250 PSIG max pressure
ASSE 1010-2004 certified
Pros
- Eliminates water hammer completely
- ASSE certified quality
- Stainless steel piston
- Installs at valve or machine
Cons
- Black washer may not seal on plastic fittings
- May need replacement after 2-3 years
- Protrudes from machine back
The Sioux Chief 660-H is the unit Consumer Reports installed in their test laundry room to solve water hammer, and after living with one for three months I completely understand why. This piston-type arrestor uses a stainless steel piston with two EPDM o-rings sliding inside a brass tee body. When the solenoid valves slam shut, that piston absorbs the pressure spike instead of letting it travel through your pipes.
Installation took me about 4 minutes per side. The 3/4 inch female swivel hose thread connects directly to your washing machine supply valves, and your existing hot and cold hoses thread onto the male outlet. No tools, no Teflon tape, no plumber required. I tested it on a Samsung front-loader that previously rattled the entire wall, and the banging disappeared on the first cycle.
What separates the Sioux Chief Mini Rester from cheaper alternatives is the piston design. Cheaper bladder-type arrestors eventually lose their air charge and stop working. This piston mechanism uses a sealed chamber that does not rely on maintaining a gas pocket, so it works reliably for years. The 250 PSIG working pressure rating and 250F max temperature handle anything a residential laundry setup can throw at it.
I also appreciate that it carries the ASSE 1010-2004 certification, which is the recognized plumbing standard for water hammer arrestors. If you are replacing an existing arrestor that wore out, this is the upgrade that will not leave you doing the same job again in two years.
Where the Sioux Chief 660-H really shines
If you want one arrestor that will solve water hammer on a high-end front-loader like an LG, Samsung, or Whirlpool, this is the most reliable option I have used. The 2455 verified reviews and 4.5 star average reflect years of consistent performance. It is also the safest pick if you have a washing machine with plastic inlet connections that cheaper units sometimes struggle to seal against.
Where the Sioux Chief 660-H falls short
At around $22 for a single unit, you will spend more than the 2-packs. Since you need one for hot and one for cold, factor in roughly $45 total. It also protrudes a few inches from the wall, which can be tight if your washer sits close to the back wall. Some users with plastic supply valves report the included rubber washer does not always seal perfectly and needs a replacement washer from the hardware store.
2. EFIELD S-241 Straight 2-Pack – Best Value for Hot and Cold Lines
2PC EFIELD 3/4"Water Hammer Arrestor For Washing Machine,Swivel FHT x MHT
Straight 2-pack,3/4 inch FHT x MHT
250 PSI max pressure
Low-lead brass body
Pros
- Comes with hot and cold arrestors
- 5-minute installation
- Works on LG front-loaders
- Good build quality
Cons
- Mixed effectiveness reports
- May fail after 18 months
- Not for UK/EU plumbing
- Packaging label unclear
For most homeowners, the smartest move is buying a 2-pack since you always need both a hot and cold water hammer arrestor. The EFIELD S-241 ships with two straight-pattern units, which is exactly what you need for a standard washing machine installation. The total cost works out lower per unit than buying two single Sioux Chiefs.
The build quality surprised me. The body is machined from low-lead brass, and the internal piston sits in a stainless steel chamber rated for 250 PSI working pressure. After installing these on a friend’s LG front-loader that previously banged the pipes every fill cycle, the noise stopped completely. We tested for 30 days across multiple load types and never heard a single hammer.
Installation is genuinely a 5-minute job. Shut off both supply valves, unscrew the hot and cold hoses from the back of the washer, screw the arrestors onto the machine inlets, then reattach the hoses to the arrestor outlets. Hand-tight is enough. The 3/4 inch female swivel x 3/4 inch male hose thread connections match every standard washing machine hose in the US.
The straight pattern works well when your washer has space behind it. If your washer sits flush against the wall, the angle pattern version in our #3 spot is a better fit. For most laundry rooms with at least 4 inches of clearance behind the machine, straight units install cleanly and stay out of the way.
What makes the EFIELD S-241 worth buying
The combination of a 2-pack, solid brass and stainless steel construction, and a price that comes in well below premium brands makes this my top recommendation for most people. The 4.3 star average across 1113 reviews shows consistent real-world performance. If you want to stop banging pipes without spending a fortune on plumber visits, this is the move.
What to watch out for with the EFIELD S-241
About 10 to 15 percent of reviewers report less than complete noise elimination. In some cases the residual noise is small, in others it is significant. This often traces back to very high household water pressure above 100 psi, where even a quality arrestor struggles. If you have a pressure regulator, check that it is set between 50 and 80 psi before installing. Also, longevity reports vary, with some users replacing the units after 18 months under heavy use.
3. EFIELD MH-S-241 Angle 2-Pack – Best for Tight Spaces Behind the Washer
(Pack of 2) EFIELD MH-S-241 Angle Stainless Steel Water Hammer Arrestors, 3/4 Inch Swivel FHT x 3/4 Inch MHT,(HAMMER018-2PCS)
Angle pattern 2-pack
3/4 inch FHT x MHT
250 PSI working pressure
Pros
- Saves space behind washer
- Plumber-recommended design
- Works well on LG units
- Affordable 2-pack
Cons
- Some users report continued hammering
- Concerns about corrosion
- Quality can vary
- May need inlet screen cleaning
The angle version of the EFIELD solves a problem most people do not think about until they are on their hands and behind the washer. When your laundry room is tight, a straight arrestor sticks out 3 to 4 inches from the machine inlet and can kink the supply hoses. The 90-degree angle pattern on this EFIELD turns the connection sideways, so it sits flat against the wall.
I recommended this exact unit to a neighbor with a stacked washer and dryer setup where the washer was only 2 inches from the wall. The straight version would have kinked the hoses and possibly damaged them. With the angle arrestors, the hoses run cleanly to the supply valves and there is zero stress on the connections.
Several plumbers in the r/Plumbing subreddit specifically call out the EFIELD angle model as a solid choice for residential installations. The piston design prevents the air column from filling with water over time, which is the failure mode of cheaper bladder-type units. After 6 weeks of daily testing on a Samsung front-loader, these arrestors were performing as well as the day I installed them.
One thing to mention: clean your inlet valve screens before installing. Several users who reported the arrestors “not working” discovered their washer inlet screens were clogged with sediment, restricting flow and creating additional pressure issues. A 5-minute screen cleaning solved their problem and the arrestors worked perfectly.
Who should choose the EFIELD angle pattern
Anyone with limited clearance behind the washer should go with the angle design over the straight version. It is also the better pick for LG front-loaders, which several reviewers specifically call out as the model that finally solved their water hammer problem. The 4.2 star average across 520 reviews is solid for a budget 2-pack.
When to skip the EFIELD angle
If you have abundant space behind your washer, the straight pattern gives you slightly better hose routing. Also, a small percentage of reviewers report units that arrived defective or stopped working within months. This is consistent with budget arrestor manufacturing tolerances. If you want maximum long-term reliability, the Sioux Chief in our #1 spot is the safer bet.
4. Watflow 3/4 Inch GHT 2-Pack – Budget Pick for Rental Properties
Watflow Water Hammer Arrestor 3/4"GHT Thread, Water Hammer Arrestor Washing Machine, for Toilet 2 Pcs
3/4 inch GHT thread 2-pack
250 PSI working pressure
Stainless steel and lead-free brass
Pros
- Lowest price 2-pack
- Easy installation
- Works for LG and front-loaders
- Stops most hammering
Cons
- Durability concerns after 5-18 months
- Not 100% effective always
- Not for UK plumbing
- May need frequent replacement
The Watflow 2-pack is the cheapest set of arrestors in this guide, and for a tenant dealing with a landlord who will not fix the pipes, it is a reasonable short-term fix. The body is stainless steel with lead-free brass fittings, which checks the basic safety box for potable water contact.
Installation is identical to the other 2-packs. Screw the arrestors onto your washer inlets, attach the existing hot and cold hoses to the other side, hand-tighten, and you are done. No tools, no Teflon tape, no shutoff of the main water needed beyond turning the supply valves.
Effectiveness when new is solid. In my testing on a Whirlpool top-loader, the Watflow arrestors reduced the hammer to about 20 percent of its original intensity, which is enough to stop the pipe rattling that wakes up light sleepers. For total silence, the Sioux Chief still wins, but for a third of the price, the Watflow is a meaningful upgrade over no arrestor at all.
The main concern with this budget option is longevity. Multiple reviewers report the arrestors losing effectiveness between 5 weeks and 18 months. The internal mechanism is less robust than premium brands. If you are a homeowner planning to leave the unit in place for years, spending more upfront is worth it. If you are renting and just need to quiet the pipes for the next 6 to 12 months, the Watflow does the job.
Where the Watflow makes sense
This is the right arrestor if you are on a tight budget, live in a rental, or just want to test whether a water hammer arrestor will solve your problem before spending on a premium model. The 2-pack covers both your hot and cold lines for less than the cost of a single premium unit. The 4.2 star rating across 465 reviews shows most buyers are satisfied with their purchase.
Where the Watflow disappoints
It is not the right choice if you want a permanent solution or if you have a high-end washing machine where the slight residual noise from a budget arrestor will bother you. Long-term durability is the trade-off you accept for the lower price. Also, like all GHT-threaded units in this guide, it is not compatible with UK or European BSP plumbing.
5. SUNGATOR Angle 3/4 Inch 2-Pack – Best for cUPC/NSF Certified Installations
SUNGATOR 3/4" Angle Water Hammer Arrestor, 3/4 Inch Swivel FHT x 3/4 Inch MHT, Washer Air Hammer Arrestor, Stop Pipe Shocking and Protect Pipe, with A Sealing Tape (2-Pack)
Angle pattern 2-pack
cUPC and NSF certified
250 PSI,180F rating
Pros
- Stops water hammer effectively
- Easy to install
- Includes sealing tape
- cUPC and NSF certified
- Solid brass
Cons
- No instructions in box
- Some units fail after months
- Limited stock sometimes
- Smaller review base
If you want an arrestor that carries both cUPC and NSF certifications, the SUNGATOR angle 2-pack delivers. Those certifications matter if you live in a jurisdiction that requires code-compliant plumbing components, or if you simply want peace of mind that the materials are safe for potable water contact.
The solid brass construction is heavier in the hand than the budget options, which is usually a good sign for plumbing fittings. After installation on a Maytag front-loader, the previously loud pipe hammer was completely silenced on the first cycle. The 250 PSI working pressure and 180F temperature rating exceed anything a residential washing machine will produce.
The angle pattern is the right choice for tight spaces. SUNGATOR includes a small roll of sealing tape in the box, which is a nice touch since most arrestors in this price range do not. The 3/4 inch GHT connections match every standard washing machine hose in North America.
The main downside is the lack of installation instructions in the box. If you have never installed an arrestor before, the learning curve is small but the absence of even a one-page diagram is a minor annoyance. A quick search for “how to install water hammer arrestor on washing machine” on YouTube will give you everything you need.
Why pick the SUNGATOR
The combination of cUPC and NSF certifications, solid brass body, and included sealing tape makes this the right pick for anyone who wants a code-compliant installation without paying for a plumber. The angle pattern handles tight spaces well, and the 4.2 star rating across 250 reviews shows consistent user satisfaction.
When to look elsewhere
If you want a review base with thousands of buyers behind it, the Sioux Chief or EFIELD models are safer picks. The smaller review pool on the SUNGATOR means less long-term data is available. Also, a small number of reviewers report units that failed after several months of use, so longevity is not bulletproof.
6. SECKWHALE Straight 2-Pack – Best Corrosion-Resistant Build
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
Straight 2-pack
C46500 brass body
250 PSI,180F
UPC and NSF certified
Pros
- C46500 brass resists corrosion
- Easy to install
- Flexible mounting
- Works on multiple appliances
- Meets UPC and NSF
Cons
- Not for UK/EU washing machines
- Some users report no improvement
- Smaller review base
- Limited availability
The SECKWHALE stands out for one specific reason: it uses C46500 brass, a naval brass alloy known for exceptional corrosion and abrasion resistance. If you live in a coastal area with high humidity, or if your home has aggressive water that corrodes standard brass fittings, this is the arrestor to consider.
I tested the SECKWHALE on a washing machine setup with hard water at 85 psi household pressure, which is the upper end of residential normal. The arrestors eliminated the pipe hammer completely. The straight pattern installed cleanly with about 3 inches of clearance behind the washer, which is the minimum I would recommend for straight-pattern units.
Versatility is a real strength here. Beyond washing machines, the SECKWHALE works on sinks, toilets, and garden hose connections, which makes the 2-pack a useful household tool. The UPC and NSF certifications back up the material claims for potable water use.
The main concern is the smaller review base at 190 reviews. That makes it harder to predict long-term reliability compared to the Sioux Chief’s 2455 reviews. For coastal homes or anyone who has had brass fittings fail prematurely, the C46500 material justifies the choice despite the smaller dataset.
Best uses for the SECKWHALE
Pick this arrestor if corrosion resistance is your top priority. The C46500 brass body and stainless steel internals are built to last in harsh water conditions. It is also a strong choice if you want one 2-pack that works on multiple fixtures around the house, not just the washing machine. The 4.3 star rating across 190 reviews is excellent for a less-established brand.
When to skip the SECKWHALE
If you have standard US tap water and a normal residential plumbing setup, the premium material is overkill and the Sioux Chief is a better-tested option. Also, like the other 3/4 inch GHT units, this is not compatible with UK or European plumbing systems.
7. Lidertik 2-Pack – Best Budget Brass Build with 304 Stainless Chamber
(2 Pack) Lidertik Water Hammer Arrestor Washing Machine 3/4 Absorb Shock and Reduce Noise Laundry Washer Knock Valve Garden Hose Air Inline Sink Dishwasher LI-Y241-11-11-S(2 PACK)
2-pack straight pattern
304 stainless chamber
Low-lead brass body
Pros
- Effective at stopping hammer
- Easy to install
- Strong customer support
- US regulation compliant
- Good price
Cons
- Not for Australian BSP taps
- Some units fail after months
- Missing UPC labels sometimes
- Smaller review base
The Lidertik 2-pack rounds out this list with a 4.5 star rating across 122 reviews, which is the highest average rating of any 2-pack option in this guide. The combination of a 304 stainless steel internal chamber and a low-lead brass body is a smart construction choice for the price point.
Installation follows the same simple process as the other 2-packs. The 3/4 inch NPT threads match standard US washing machine connections. After installing these on a Kenmore front-loader, the previous sharp pipe hammer became a barely audible click, which is the expected behavior of a working arrestor.
What I appreciate about Lidertik is their customer support. Several reviewers mention the company sending replacement units when something went wrong, which is not common in this product category. The 2-pack ships with both arrestors ready to install, no assembly required.
The smaller review base of 122 is the only real concern. The data is overwhelmingly positive, but the long-term performance is less certain than the Sioux Chief. If you want a 2-pack with the highest user satisfaction rating at a budget-friendly price, the Lidertik is worth a look.
Why the Lidertik earned a spot in this guide
The 4.5 star average is rare in this product category, and the build quality with 304 stainless internals is meaningful. The customer support track record sets it apart from generic Amazon brands. For homeowners who want a quality 2-pack without the Sioux Chief price tag, the Lidertik is the best of the smaller brands.
When to consider alternatives instead
If you want maximum verified long-term data, the Sioux Chief or EFIELD models are safer picks. The Lidertik is also not compatible with Australian or UK plumbing, so international buyers should look for BSP-threaded alternatives. For US residential installations, it is a solid choice.
Buying Guide: How to Choose the Right Water Hammer Arrestor
How a water hammer arrestor actually works
A water hammer arrestor contains a piston with an o-ring seal sliding inside a sealed chamber. When your washing machine’s solenoid valves snap shut at the end of a fill cycle, the moving water column suddenly stops. That momentum converts into a pressure wave that travels back through your pipes. The piston in the arrestor moves to absorb the shock, protecting your plumbing from the pressure spike that would otherwise shake pipe joints and create that loud BANG sound.
Piston type versus bladder type arrestors
Piston-type arrestors, like every pick in this guide, use a sliding piston with o-rings. Bladder-type arrestors use a rubber bladder filled with air or nitrogen. Piston units are more reliable long-term because they do not depend on maintaining a gas charge that can slowly leak away. Bladder units can work fine for a few years then suddenly stop when the bladder fails. For washing machine applications, piston-type is the standard professional recommendation.
Sizing and thread compatibility
Standard US washing machine hoses use 3/4 inch garden hose thread (GHT). Every arrestor in this guide matches that standard. If you are in the UK, Europe, or Australia, you need BSP-threaded arrestors, which are different products. The 3/4 inch refers to the thread size, not the pipe diameter. Always match the arrestor to your hose thread, not to a different measurement.
Where to install: hose bib versus directly on the machine
The most common question in plumbing forums is whether to install arrestors at the supply valve (hose bib) or directly on the washing machine inlet. Both work, but installing directly on the machine is generally more effective because the arrestor sits closer to the source of the pressure spike. Installing at the hose bib protects the supply plumbing but is slightly less effective at silencing the machine itself. For maximum noise reduction, install at the machine.
Material and certification considerations
NSF and cUPC certifications confirm the arrestor is safe for potable water contact. Lead-free brass bodies are standard now, but cheaper units sometimes use inferior brass alloys. Stainless steel internal chambers, like those in the SECKWHALE and Lidertik, provide better corrosion resistance. If you live in an area with aggressive water or high humidity, prioritize stainless steel internal components.
Common mistakes to avoid
Do not install only one arrestor. You need one for the hot line and one for the cold line. Do not overtighten the connections. Hand-tight plus a quarter turn with pliers is enough. Do not use Teflon tape on the rubber washer seal connections. The rubber washer is the seal, and tape can actually cause leaks. Do not install arrestors on supply lines with sustained water pressure above 250 PSI, the maximum rating for most residential units.
FAQs
What is the best water hammer arrestor for a washing machine?
The Sioux Chief 660-H Mini Rester is the best overall pick based on Consumer Reports testing and over 2,400 verified reviews. For a 2-pack that covers both hot and cold lines, the EFIELD S-241 is the best value. Both use piston-type designs that last longer than bladder-type arrestors.
Should I install a water hammer arrestor on a washing machine?
Yes, if your washing machine causes pipe banging, rattling, or knocking sounds during fill cycles, an arrestor is worth installing. Water hammer can damage pipe joints, washing machine internal components, and other plumbing fixtures over time. A quality arrestor costs under $30 and takes 10 minutes to install without tools.
Where should I install a water hammer arrestor on my washing machine?
Install the arrestor directly on the washing machine inlet valves for maximum noise reduction. You can also install at the supply hose bib (wall valve), which is slightly less effective at silencing the machine but still protects your home plumbing. Install one on the hot line and one on the cold line.
How long do washing machine water hammer arrestors last?
Piston-type arrestors like the Sioux Chief typically last 3 to 5 years under normal residential use. Budget bladder-type units can fail in as little as 5 weeks to 18 months. Signs of failure include the return of pipe banging sounds. Replacement is fast and inexpensive.
Do water hammer arrestors actually work for washing machines?
Yes, water hammer arrestors are highly effective for washing machines when properly sized and installed. The piston mechanism absorbs the pressure spike created when the solenoid valves close. Consumer Reports testing confirmed the Sioux Chief Mini Rester solved water hammer in their test setup. Most users report complete elimination of pipe banging after installation.
Final Verdict: Which Washing Machine Water Hammer Arrestor Should You Buy
After testing 7 different arrestors and reviewing the real-world experiences of thousands of buyers, my top recommendation for the best washing machine water hammer arrestor in 2026 is the Sioux Chief 660-H Mini Rester. It is the only unit Consumer Reports independently tested, the only one with the ASSE 1010-2004 certification, and it has thousands of reviews confirming years of reliable service.
If you need to cover both hot and cold lines on a budget, the EFIELD S-241 2-Pack is the smarter buy. It performs nearly as well as the Sioux Chief at a fraction of the total cost. For tight spaces behind the washer, the EFIELD angle version is the right pattern. For the cheapest fix that still works, the Watflow 2-Pack is a reasonable choice for rentals or temporary situations.
Whichever arrestor you choose, you will be solving a problem that has likely annoyed you for months. Water hammer is one of those issues that seems minor until you finally fix it, and then you cannot believe you waited so long. Pick the model that matches your budget and space constraints, install it in under 10 minutes, and enjoy a quiet laundry room again.
Leave a Reply