EFIELD Universal Washing Machine Outlet Box - Durable Pex Connection

In this review of the EFIELD Universal Washing Machine Outlet Box, the bottom line is simple: it is for homeowners and installers who want a tidy, reliable washing machine inlet and drain assembly with integrated PEX connections and built-in water hammer arrestors. The single biggest reason to buy is the combination of a 1/2 in Pex-A cold expansion fitting inlet and 3/4 in MHT outlet connections with stainless steel water hammer arrestors already installed, which reduces installation steps and the chance of leaks when compared to loose components.

Key Features

• Integrated PEX-A inlet: The 1/2 in Pex-A cold expansion fitting connection provides a secure, manufacturer-grade supply connection that speeds installation and reduces solder or threaded joints.
• Standard outlet size: The 3/4 in MHT outlet connections make hooking up washing machine hoses straightforward and compatible with common appliances.
• Built-in shutoffs: The 1/4-turn hot and cold ball valves let you isolate supply lines quickly for service without shutting down a whole system.
• Water hammer protection: Stainless steel water hammer arrestors are installed at the valves, helping prevent banging pipes and protecting fittings under sudden valve closure.
• Concealed installation fit: The box measures 9 in x 7.8 in with a 4.2 in depth and a snap-on frame that accepts up to 1 in drywall, so it fits cleanly into standard framed walls.

Who It's For

This outlet box is aimed at homeowners doing a laundry room install or remodel and plumbing professionals who prefer PEX systems from an established PEX manufacturer. Its built-in features suit those who want to minimize field fittings, speed up install time, and reduce leak points.

It is less suited for setups requiring nonstandard drain arrangements or non-PEX supply materials; installers working exclusively with copper sweat fittings or unusual framing depths should verify compatibility before purchasing.

Pros & Cons

Pros

• Solid build quality and appearance, with integrated valves and arrestors for fewer loose parts.
• Ease of installation thanks to the Pex-A cold expansion inlet and standard 3/4 in MHT outlets.
• Value for money compared to sourcing valves, arrestors, and a box separately.

Cons

• One customer reported an issue with a red ball valve not sealing perfectly, so valve operation should be checked on arrival.

Specifications

Brand	EFIELD
Inlet connection	1/2 in Pex-A cold expansion fitting
Outlet connection	3/4 in MHT
Valves	1/4-turn hot and cold ball valves
Water hammer arrestor	Stainless steel, installed
Overall size	9 in x 7.8 in (frame panel)
Depth and frame	4.2 in depth, snap-on frame up to 1 in drywall

Our Verdict

The EFIELD Universal Washing Machine Outlet Box is a practical, well-built choice for anyone installing a PEX-based laundry supply and drain. It saves time by combining PEX-A inlets, standard 3/4 in outlets, shutoffs, and stainless steel arrestors into one unit, offering solid value and fewer leak risks when installed correctly. Professionals and DIYers who favor PEX systems will find it a dependable, space-saving option.

Frequently Asked Questions

Does this box include water hammer arrestors?
Yes. Stainless steel water hammer arrestors are installed at the hot and cold valves.

What supply and outlet sizes does it use?
The inlet is a 1/2 in Pex-A cold expansion fitting and the outlets are 3/4 in MHT for washing machine hoses.

Will it fit standard drywall and wall cavities?
The box measures 9 in x 7.8 in with a 4.2 in depth and includes a snap-on frame that supports up to 1 in drywall thickness.