Do you ever hear a loud banging sound coming from your laundry room right after the washing machine stops filling? That startling noise is called “water hammer,” and it happens when water flowing quickly suddenly stops. It is more than just annoying; this forceful shockwave can actually damage your pipes over time!
Choosing the right water hammer arrestor for your washing machine can feel confusing. You see different sizes and types, and you worry about picking the wrong one. Will it fit? Will it actually stop the banging? Getting this small part wrong means you are still stuck with that noisy vibration and potential pipe stress every time you run a load.
This post cuts through the confusion. We will clearly explain what a washing machine water hammer arrestor does and show you exactly how to pick the perfect model for your home setup. By the end, you will know exactly what to buy to silence those loud pipe knocks for good.
Top Water Hammer Arrestor For Washing Machine Recommendations
- 2 Pieces Stainless Steel Water Hammer Arrester For Washing Machine Supply Valves or Directly to Washing Machine Tube Connection:
- 3/4 inch Female Swivel Hose Thread x 3/4 inch Male Hose Thread; Max working pressure: 250 PSI
- Can be Installed Horizontally or Vertically
- Aborb the Unstable Water Shock and Noise to Protect Washing Machine Control System
- Low lead Brass made body
- 2 Pieces Angle Stainless Steel Water Hammer Arrestor For Washing Machine Supply Valves or Directly to Washing Machine Tube Connection:
- 3/4 inch Female Swivel Hose Thread x 3/4 inch Male Hose Thread; Max working pressure: 250 PSI
- Can be Installed Horizontally or Vertically
- Aborb the Unstable Water Shock and Noise to Protect Washing Machine Control System
- Low lead Brass made body
- 【Lead Free Brass】:Forged from solid C46500 brass that delivers high corrosion and abrasion resistance performance.They are certified with ASSE1010,NSF/ANSI 61,cUPC.
- 【Extra-Long Service Life】:This angle water hammer arrestor connects 3/4" GHT Male and 3/4" GHT Female pipe or fitting. Its MAX working pressure and temperature can be rated up to 250 PSI and 180°F.
- 【FUNCTIONALITY】: Water hammer arrestors shall be specifically sized and have sufficient volume of air to dissipate the calculated kinetic energy generated by closing residential washing machine valves. Arrestors shall be installed on both hot and cold supply inlets of washing machine valves. Arrestors shall be approved for installation with no access panel required.
- 【EASY INSTALLATION】This angle water hammer arrestor can be installed horizontally, vertically in any position in between,are expertly designed to absorb Unstable Water Shocks and Noise, safeguarding the plumbing pipeline.
- 【HOW TO CONNECTION】: It's easy to install, you need to turn off the hot & cold water outlets to your washer, unscrew the hoses (they will still have some water left in them, so have a towel handy), screw the hoses into the arrestors first, and then finally screw the arrestors directly in to the back of your washing machine. They have a long stem so they can clear the back panel of the washing machine easily if the inlets are recessed.
- Straight – straight compression arresters install on any ½" nom. Copper leg or riser and are especially popular in retrofitting ½" nom. Air chambers
- Straight – straight sweat arresters are compatible with press-fitting systems, such as viega propress and all push-fitting systems
- Straight – pex miniresters are available with F1807, F1960 and viega pexpress connections
- Tee – hose tee arresters install on washing Machine supply valves or directly to washing Machine
- Tee – full slip tee sweats in-line on ½" cts near problem valve or Fixture
- 3/4" GHT WATER HAMMER ARRESTOR: This straight water hammer arrestor connects 3/4" GHT Male and 3/4" GHT Female pipe or fitting. The MAX working pressure and temperature can be rated up to 250 PSI and 180°F.
- Noise Reduction: This Water hammer arrestor washing machine prevent pipes from shaking and pounding to reduce the unstable water pressure and noise.
- Long Lasting: The water hammer arrestors Made from high-quality C46500 brass, known for its high corrosion and abrasion resistance. This material ensures reliability and durability in residential environment.
- Safe To Use: SECKWHALE water hammer arrestor meets American standards and complies with UPC and NSF requirements, ensuring it’s safe for drinking water.
- Flexible Installation: This water hammer arrestor features a flexible design that meets different installation needs and can be installed either horizontally or vertically.
- The water hammer arrestors are easy to install on the washing machines and washing machine outlet box.
- Solving water hammer issues, absorb shock and reduce noise, pretect washing machines and water supply lines.
- 2 pieces in box. 3/4 inch male thread and 3/4 inch famale thread.
- Compliant with US regulations.
- If you have any quality problems, please contact us immediately, we will actively deal with.
- Reduce noise：Our water hammer lightning arresters aborb the unstable water shock to reduce the operating noise of washing machines, toilets and dishwashers, and extend the service life of your pipes.
- Premium Construction: Space-optimized design with multidirectional installation capability (horizontal/vertical orientations). Making water hammer arrestor garden hose ideal for installation in tighter spaces.
- Certification Assurance: The Washing Machine Water Hammer Arrestor meets U.S. standards and complies with cUPC and NSF requirements, ensuring safety for both drinking water and water supply systems.
- Long Lasting: Forged from solid brass that delivers high abrasion resistance performance, 3/4" water hammer arrestor is excellent for pipe fitting system as it can withstand long period of wear and tear.
- What You Get:2 pcs straight water hammer arrestor washing machine, made of a lead-free brass body and stainless steel, with 3/4 inch Female Swivel Hose Thread x 3/4 inch Male Hose Thread, offering exceptional resistance to wear. The maximum operating water pressure and temperature are 250 PSI and 180°F
- Stainless Steel Water Hammer Arrester For Washing Machine Supply Valves or Directly to Washing Machine Tube Connection:
- 3/4 inch Female Swivel Hose Thread x 3/4 inch Male Hose Thread;
- Max Working Pressure: 250 PSI ,Low Lead Brass , cUPC and NSF listed.
- Can be Installed Horizontally or Vertically
- Aborb the Unstable Water Shock and Noise to Protect Washing Machine Control System
The Ultimate Buying Guide: Stopping Those Banging Pipes!
Does your washing machine sound like a small earthquake when it stops filling? You are likely experiencing water hammer. This is a sudden bang or shudder in your pipes when a fast-closing valve, like the one in your washing machine, slams shut. A water hammer arrestor fixes this annoying and potentially damaging problem. This guide helps you choose the best one.
Key Features to Look For
When shopping for a water hammer arrestor, focus on these important parts:
- Connection Size: Make sure the arrestor fits your washing machine’s supply line. Most use a standard 3/4 inch hose thread (GHT).
- Air Chamber Design: Good arrestors use a sealed air chamber. This chamber acts like a shock absorber for the water. Look for models that clearly state they have a built-in air cushion or piston.
- Mounting Style: Some arrestors screw directly onto the shut-off valve. Others are designed to be installed further down the line. For washing machines, the direct-mount style is usually easiest.
- Durability Rating: Check if the manufacturer lists how many cycles or how long the unit is rated to last. Longer ratings mean better quality.
Important Materials Matter
The materials used decide how long your arrestor works well. Cheap plastic might crack under pressure. Good quality arrestors use strong, lasting materials.
- Body Material: Look for brass or high-grade, durable plastic (like ABS or PVC). Brass lasts the longest and handles high water pressure better.
- Seals and Diaphragms: The internal seals must be made of strong rubber or flexible plastic that resists wear from constant water movement.
Factors That Improve or Reduce Quality
Not all arrestors perform the same. A few things make a big difference in how well they stop the noise and how long they last.
Quality Boosters:
- Factory Pre-charged: The best arrestors come pre-charged with the correct air pressure. This means they work right out of the box.
- Piston Design: Arrestors with a physical piston separating the water from the air often perform better over time than simple sealed bags.
Quality Reducers:
- No Serviceability: If you cannot easily check or recharge the air pressure (though rare for washing machine types), the unit might fail silently later on.
- Thin Walls: If the body feels too light or thin, it probably uses cheaper plastic that breaks down faster.
User Experience and Use Cases
The main goal is simple: quiet operation. You want to run your laundry without hearing loud banging every time the machine switches from filling to draining.
When Do You Need One?
You definitely need a water hammer arrestor if you hear loud noise when:
- The washing machine fills quickly and suddenly stops.
- The machine switches between hot and cold water inputs rapidly.
- You have long stretches of pipe between the main water shut-off and the laundry area.
Installation should be straightforward. Most users report that they simply unscrew the existing washing machine hose from the wall valve, screw the arrestor onto the valve, and then screw the hose onto the arrestor. A successful installation results in immediate silence when the machine runs.
10 FAQs About Washing Machine Water Hammer Arrestors
Q: What exactly is water hammer?
A: Water hammer is the loud banging sound you hear when fast-closing valves, like those in your washer, stop water flow suddenly. The moving water slams into the closed valve.
Q: Will this arrestor fit any washing machine?
A: Most arrestors use a standard 3/4 inch hose thread connection, which fits nearly all modern washing machines and wall valves in the US. Always check the connection size before buying.
Q: How do I know if my arrestor needs replacing?
A: If you install a new arrestor and still hear banging, or if an old one suddenly stops working, it might have failed. Sometimes the internal air cushion leaks out over many years.
Q: Do I need one for both the hot and cold water lines?
A: Yes. Since washing machines use both hot and cold water valves, you should install one arrestor on both the hot and cold shut-off valves for complete protection.
Q: Can I install this myself?
A: Absolutely. Installation is very easy for most models. You need no special tools, usually just your hands or a simple wrench to tighten the connections.
Q: Does the material affect how well it works?
A: Yes. Brass bodies tend to be more durable than plastic bodies, especially if your home has very high water pressure.
Q: Will this slow down my water flow?
A: A properly sized and installed arrestor will not noticeably slow down the time it takes your washing machine to fill.
Q: What is the main difference between a cheap plastic one and a good brass one?
A: The main difference is lifespan and resistance to pressure. Brass units last longer and handle pressure spikes better than basic plastic versions.
Q: Do I need to turn off the main water supply to install this?
A: It is always best practice to turn off the water supply to the washing machine valves before you unscrew anything, just in case the connections leak when you open them.
Q: Are these arrestors reusable if I move my washing machine?
A: Yes, since they usually just unscrew, you can easily remove them and take them with you when you move or upgrade your laundry setup.