6 Best Water Hammer Arrestors for Home Plumbing
Stop destructive water hammer in your farm’s plumbing. Our guide to the 6 best arrestors helps you prevent burst pipes and other costly repairs.
That loud BANG you hear in the walls when the livestock waterer shuts off isn’t just an annoyance; it’s the sound of a shockwave slamming through your plumbing. This hydraulic jolt, known as water hammer, is a common problem on farms where quick-closing valves on irrigation systems and appliances are the norm. Ignoring it is a gamble that can lead to burst pipes, damaged valves, and expensive, time-consuming repairs when you can least afford them.
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What Is Water Hammer and Why It Damages Farm Pipes
Water hammer happens when a fast-moving column of water in a pipe is forced to a sudden stop. Think about the solenoid valve on an automatic stock tank filler—it snaps shut instantly. The water’s momentum has nowhere to go, creating a high-pressure spike that travels back through the pipes at the speed of sound.
This isn’t a minor issue. That shockwave rattles pipes, stresses joints, and can eventually cause fittings to fail. On a farm, the stakes are higher than in a typical house. A burst pipe in a barn on a freezing night can be catastrophic, and a failed valve on your main irrigation line can flood a field or ruin a pump.
The culprits are almost always valves that close abruptly. Common sources on a hobby farm include:
- Washing machines in the mudroom
- Solenoid valves for irrigation zones
- Automatic livestock waterers
- Quick-shutoff nozzles on hoses
- Dishwashers and ice makers
A water hammer arrestor acts as a shock absorber. It’s a small chamber with a piston or diaphragm separating a sealed cushion of air from the water. When the pressure spike hits, the piston compresses the air, absorbing the energy and preventing it from damaging your plumbing.
Sioux Chief Hydra-Rester for General Farm Use
The Sioux Chief Hydra-Rester is the reliable workhorse you’ll find in most plumbing supply houses for a good reason. It’s a simple, effective, and affordable solution for the most common water hammer problems. This is the arrestor you install behind the washing machine or near the utility sink in the workshop.
Its design is straightforward: a sealed copper tube contains a piston that separates water from a permanent air charge. When a shockwave hits, the piston moves, compressing the air and dissipating the pressure. They are certified for life, meaning you install it and forget about it. There’s nothing to recharge or maintain.
Sioux Chief offers these in various sizes and connection types, including threaded, sweat, and push-to-connect. This versatility makes them easy to add to existing copper or PEX plumbing without a major project. For most single-fixture applications around the farmstead, from the house to the barn, a Hydra-Rester is the right tool for the job.
Oatey Quiet Pipes for Barn and Utility Sinks
Think of Oatey Quiet Pipes as the most widely available and dependable alternative to Sioux Chief. You can find them in nearly any hardware or home improvement store, making them a great choice when you need a solution today. They function identically to other piston-type arrestors and are perfect for protecting individual fixtures.
These are ideal for point-of-use installation on hot and cold water lines feeding barn sinks, pressure washer hookups, or utility tubs. Like their competitors, they are maintenance-free and come in all the standard connection types. Their primary advantage is accessibility; when you hear a pipe start banging, you can likely grab one locally and install it the same day.
Don’t overthink the choice between an Oatey and a Sioux Chief for standard applications. Both are well-made, certified products that will solve the problem effectively. The decision often comes down to what’s available on the shelf when you need it.
Watts LF150A: A Heavy-Duty Irrigation Choice
When you move from a single sink to a whole irrigation system, you need to step up your equipment. The Watts LF150A is a larger, more robust arrestor designed for commercial applications and high-flow systems. This is the unit you need to protect your main water lines from the cumulative effect of multiple solenoid valves snapping shut.
Unlike the smaller, single-fixture models, the Watts LF150A is built to handle much greater hydraulic shock. Imagine three irrigation zones shutting off within seconds of each other. That creates a powerful, combined shockwave that can easily damage pumps, backflow preventers, and mainline fittings. The LF150A is sized to absorb that much larger energy spike.
This arrestor is overkill for a washing machine, but it’s essential for protecting the heart of your irrigation system. It typically gets installed on the main line just downstream from your pump or where the irrigation system branches off from your main supply. It’s a bigger investment, but it’s cheap insurance compared to replacing a multi-hundred-dollar irrigation manifold.
Zurn Z1712-XL: Commercial-Grade Durability
For areas on the farm with constant, repetitive water use, you need something built for the long haul. The Zurn Z1712-XL is a commercial-grade arrestor that prioritizes extreme durability. Think of the plumbing in a dairy wash-down area, a produce processing sink, or any other spot where valves are opened and closed dozens or hundreds of times a day.
These arrestors often feature stainless steel bodies and are engineered to withstand the relentless abuse of a commercial environment. While a standard arrestor would work for a while, the Zurn is designed to handle that frequency without failing. It provides peace of mind in your most critical, high-traffic plumbing systems.
The tradeoff is cost. A Zurn arrestor is a significant step up in price from a residential model. However, if it’s protecting a system vital to your farm’s operation, the cost is easily justified by the prevention of downtime and emergency repairs. This is a "buy it once, buy it right" solution for your toughest plumbing challenges.
ProFlo Mini-Rester for Tight Plumbing Spaces
Sometimes the problem isn’t the size of the shockwave, but the size of the space you have to work in. ProFlo Mini-Resters are compact arrestors designed specifically for tight spots where a standard-sized unit won’t fit. They are perfect for installation behind cabinets, under sinks, or for appliances with recessed utility boxes.
These small-format arrestors are most commonly used for things like icemaker lines, dishwashers, or small sinks. They often come with push-to-connect or compression fittings, making them incredibly easy to install on PEX or copper supply lines without soldering. You simply cut the line, push the arrestor in, and you’re done.
While they work wonders in cramped quarters, remember they are sized for smaller fixtures. A mini-rester won’t be effective on a high-flow washing machine or a main irrigation line. Use them for their intended purpose: solving water hammer for individual, low-flow fixtures where space is at a premium.
Camco Arrestor for Outdoor Hose Bibb Protection
An often-overlooked source of water hammer on the farm is the outdoor hose bibb. Using a pistol-grip or quick-shutoff nozzle creates the same sudden stop and pressure spike as any other valve. This can be especially damaging to frost-proof hydrants, where the valve seat is located deep inside the wall, making repairs a major headache.
The Camco Hose Bibb Arrestor is a brilliantly simple solution. It’s a small brass arrestor with a male hose thread on one end and a female on the other. You simply screw it onto your spigot, then attach your hose to the arrestor. That’s it.
This device lives permanently on your hydrant, absorbing the shock every time you release the handle on your spray nozzle. It’s an inexpensive piece of hardware that can prevent a very costly plumbing repair. Every outdoor spigot on the farm should have one.
Sizing and Placement on Your Farm’s Plumbing
Choosing the right arrestor is only half the battle; where you put it is just as important. The golden rule is to install the arrestor as close as possible to the offending valve. The further away it is, the more pipe is exposed to the initial shockwave, reducing the arrestor’s effectiveness. For a washing machine, this means installing it on the supply valves right behind the unit.
Sizing is based on a system called "Fixture Units" (FU), which is a simple way to quantify water demand. You don’t need to be a professional plumber to figure it out. A simple framework works for most farm situations:
- Single Fixture: For one appliance or sink, a small, point-of-use arrestor like a Sioux Chief or Oatey is sufficient. Match the connection size (usually 1/2" or 3/4") to your supply line.
- Group of Fixtures: If multiple fixtures are causing a problem on a single branch line (e.g., a bathroom group in the barn), you can install a larger arrestor on that branch to protect all of them.
- Main Line Protection: For an entire system like irrigation, you need a large, heavy-duty arrestor like the Watts model, installed on the main supply line before it splits off to the individual zone valves.
Don’t assume one large arrestor at the start of your system will solve everything. Water hammer is a localized event. The most effective strategy is placing smaller arrestors right at the source of the problem—the fast-closing valves themselves.
A few dollars spent on the right water hammer arrestor is a tiny investment to protect the hundreds or thousands of dollars you have tied up in your farm’s plumbing system. It’s a simple, proactive step that prevents a noisy nuisance from becoming a costly emergency.
