W-400 - Genuine OEM Symmons Laundry-Mate Washing Machine Valve
W-400 – Genuine OEM Symmons Laundry-Mate Washing Machine Valve
The W-400 Genuine OEM Symmons Laundry-Mate Washing Machine Valve is a factory-original water supply control valve designed for washing machine installations. Manufactured by Symmons, this high-quality valve controls both hot and cold water flow to your washer while helping protect against leaks and hose failure.
Available from Appliance Kingdom, a trusted Canadian supplier based in Edmonton, AB, this part ships quickly across Canada to homeowners, landlords, and professional installers. Replacing a worn or faulty washing machine valve is essential to maintain safe water control and prevent potential flooding issues.
What This Washing Machine Valve Does
The Symmons W-400 Laundry-Mate valve is installed in the water supply line feeding your washing machine. It performs two critical functions:
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Controls water flow to both hot and cold inlet hoses using a single lever
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Relieves constant water pressure from hoses when not in use, helping reduce the risk of hose bursts and leaks
This valve is designed with an automatic shut-off function and durable brass construction, making it suitable for residential laundry installations operating under typical household water pressures .
Using a Genuine OEM Symmons valve ensures proper sealing, pressure handling, and long-term reliability—critical for any component connected to your home’s water supply.
Why This Part Matters
Unlike internal washer components, this valve directly connects your appliance to your home’s plumbing system. A properly functioning valve:
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Prevents continuous water pressure buildup in hoses
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Reduces the risk of flooding due to burst supply lines
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Ensures safe and reliable water shut-off control
If this valve fails, it can lead to serious issues such as leaks, uncontrolled water flow, or inability to shut off water to the washer.
Common Symptoms of a Faulty Washing Machine Valve
If your water supply valve is worn or damaged, you may experience:
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Water leaking from the valve body or connections
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Inability to fully shut off water to the washer
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Stiff, loose, or unresponsive control lever
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Water continuing to flow even when the valve is off
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Visible corrosion or mineral buildup around the valve
If you notice any of these issues, replacing the W-400 valve can restore proper water control and help prevent costly water damage.
Compatibility Guidance
This part is designed for washing machine water supply systems, not for internal appliance repair.
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Compatible with standard residential washer plumbing setups
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Typically installed between 1/2-inch supply lines and washer hoses
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Designed for use with hot and cold water connections
Always verify your plumbing configuration and installation requirements before ordering. If unsure, Appliance Kingdom can assist with confirmation.
Key Features & Benefits
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Genuine OEM Symmons valve for dependable performance
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Single-lever control for both hot and cold water supply
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Helps reduce hose pressure stress and extend hose lifespan
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Durable brass body construction for long-term reliability
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Rated for up to 100 PSI and high-temperature water applications
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Designed for standard laundry installations in residential settings
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Ideal for homeowners, landlords, and professional installers
Installation Overview
Installing the W-400 washing machine valve involves working directly with your home’s water supply lines.
Typical installation steps include:
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Shutting off the main water supply
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Removing the existing valve (if installed)
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Mounting the new valve between wall studs or supply lines
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Connecting hot and cold water supply lines
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Attaching washer hoses and testing for leaks
This installation is generally considered moderate difficulty and may require plumbing experience.
Professional installation is strongly recommended, especially if modifications to plumbing lines are required.
Canada-Wide Availability & Trusted Supply
When you order from Appliance Kingdom, you benefit from:
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Fast shipping across Canada
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A reliable Canadian appliance and plumbing parts supplier
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Products suited for Canadian residential plumbing standards (CSA-compliant systems)
Buyer Confidence & Support
With the W-400 Genuine OEM Symmons Laundry-Mate Valve, you get:
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Proven OEM quality and durability
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Reliable water control and leak prevention
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Confidence in safe washer operation
Need help confirming if this valve is right for your setup? The Appliance Kingdom team is available to assist before purchase.