Best Washer Box Hammer Arrestors for Quiet, Efficient Laundry
Choosing the right washer box hammer arrestor can reduce water hammer, protect valves, and keep laundry spaces quiet. This guide highlights five top options known for reliability, installation practicality, and durable materials. Each entry includes a quick overview, notable features, and practical usage notes to help American homeowners pick the best match for their plumbing setup.
| Product | Brand | Key Feature |
|---|---|---|
| (Pack of 2) EFIELD S-241 | EFIELD | Stainless steel, 3/4″ FHT x 3/4″ MHT, up to 250 PSI |
| GUOFIS Washing Machine Outlet Box | GUOFIS | Central and side drain, 1/2″ PEX Inlet |
| EFIELD Premium Outlet Box | EFIELD | 1/2″ Pex Crimp, center drain, stainless steel arrestor |
| Orianse 2 Pack Arrestors | ORIANSE | Lead-free brass, 3/4″ connections, rated to 250 PSI |
| EFIELD Outlet Box WM013 | EFIELD | Pex-A Inlet, 3/4″ MHT Outlet, center & side drain |
The selections below provide a range of configurations—from boxed outlet setups to standalone arrestors—designed to accommodate different home plumbing layouts and building codes. The features highlighted reflect common install options and durability considerations important for long-term performance.
(Pack of 2) EFIELD S-241 Stainless Steel Water Hammer Arrestor
The EFIELD S-241 set includes two stainless steel arrestors designed for washing machine supply valves or direct tube connections. They feature 3/4 inch female swivel hose thread to 3/4 inch male hose thread connections, with a maximum operating pressure of 250 PSI. Installation can be horizontal or vertical, offering flexibility for various laundry room layouts. The stainless steel construction provides corrosion resistance in typical water systems. These arrestors are a practical option when upgrading from older copper or brass components that may be prone to wear.
GUOFIS Washing Machine Outlet Box With Water Hammer Arrestor
The GUOFIS outlet box combines a central drainage design with a side drain option and includes a 1/4-turn hot and cold shut-off ball valve. The unit uses non-corrosive plastic for long-term reliability and a lead-free brass valve to resist corrosion and high temperatures. It is UPC certified and intended for recessed residential installations, with a layout that allows inversion or flexible mounting. The assembly supports straightforward mounting and is compatible with various washing machine configurations, providing a compact, integrated solution for modern laundry rooms.
EFIELD Premium Outlet Box With Center Drain
EFIELD’s Premium Outlet Box includes a 1/2-inch PEX crimp (F1807) inlet and a 3/4-inch MHT outlet connection, with 1/4-turn hot and cold brass ball valves and a stainless steel water hammer arrestor pre-installed. The unit emphasizes a center drain configuration and is designed for use with PEX systems. It is positioned as a robust option for new installations where a reliable, integrated water hammer solution is required, reducing vibration and pipe movement during valve shut-off.
Orianse 2 Pack Washing Machine Arrestors
Orianse offers a lead-free brass arrestor pair designed to connect 3/4″ MHT to 3/4″ GHT hoses. The straight arrestors are compatible with standard 3/4″ plumbing connections and are built to withstand up to 250 PSI and temperatures up to 180°F. They’re certified for residential use and emphasize durability under typical washing machine cycling conditions. The two-pack provides a cost-effective approach for dual-valve installations or for adding arrestors to multiple supply lines.
EFIELD Outlet Box WM013
EFIELD’s WM013 model pairs a 1/2″ PEX-A expansion inlet with 3/4″ MHT outlet fittings, complemented by lead-free 1/4-turn hot and cold valves and integrated water hammer arrestors. It features center and side drain designs, offering flexibility for layout. The enclosure measures a compact footprint suitable for contemporary laundry spaces, helping to streamline pipe routing while minimizing water hammer risks during valve operations.
Buying Guide
Key considerations when selecting washer box hammer arrestors include compatibility, installation environment, and durability. First, evaluate inlet/outlet sizes and threading (3/4″ MHT vs 1/2″ PEX, etc.) to ensure a proper fit with existing plumbing. Second, consider the drain design (center, side, or recessed) and whether the box must accommodate separate hot and cold valves. Third, material choice matters: stainless steel offers corrosion resistance, while brass remains robust for high-temperature applications. Fourth, look for certifications such as UPC, NSF, and ASSE while ensuring the unit is rated for the expected water pressure (often up to 250 PSI). Finally, assess installation flexibility: horizontal vs vertical orientation and whether the unit supports PEX or copper connections, or requires a press tool for copper systems. When comparing options, prioritize kits that provide integrated arrestors, shut-off valves, and a straightforward mounting scheme to minimize installation time and future maintenance needs.
Additional perspectives to consider include:
- System compatibility: Some homes use PEX, CPVC, or copper piping. Ensure the arrestor and outlet box support your material type and preferred connection method (crimp, expansion, or threaded).
- Maintenance and serviceability: Look for arrestors that are easy to access for testing or replacement without invasive disassembly.
- Noise and vibration reduction: Higher quality arrestors with proper air chambers and robust housings typically provide better dampening of water hammer.
- Code compliance: Confirm that the chosen product aligns with local plumbing codes and that any included valves meet applicable standards (e.g., lead-free brass).
- Budget and longevity: While premium materials may have a higher upfront cost, they can offer longer service life in homes with hard water or aggressive shut-off cycles.