Model # W-400

Internet #202269938

Store SKU #498346

Symmons 1 in. Copper IPS PE Laundry-Mate Washing Machine Valve


1 in. Copper IPS PE Laundry-Mate Washing Machine Valve

$3543 /each
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Frequently Bought Together

Product Overview

The Symmons Washer Machine valve comes with the valve assembly only and has a limited lifetime warranty. The valve removes water supply pressure and designed to withstand domestic water supply pressures. Symmons has been the trusted choice by professionals for over 75 years; when you choose Symmons you choose quality.

California residents: see   Proposition 65 information

  • Removes water supply pressure to limit danger of flooding from bursting supply hoses
  • Single lever that works like a switch by controlling both hot and cold water supply to machine
  • Designed to withstand domestic water supply pressures
  • 1/2 in. elbow sweat union connections
  • Valve only for unfinished areas (model W-400)
  • Attractive valve enclosure (model W-500-B)
  • Brass valve body

Info & Guides

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Product Depth (in.)
Product Height (in.)
1.9 in
Product Length (in.)
4.78 in
Product Width (in.)
4.75 in
Valve Inlet Diameter (in.)
Valve Outlet Diameter (in.)


Water Supply
Compatible Pipe Material
Lead Free,Mounting Bracket Included
Maximum Pressure (psi)
Maximum Working Temperature (F)
Product Weight (lb.)
Valve Type
Washing Machine

Warranty / Certifications

Manufacturer Warranty
Lifetime Homeowner

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Customer Questions & Answers

Can washers be replaced if valve leaks?

Hot water does not shut off...can washer be replaced?
Asked by: steve
Free rebuild kit under lifetime warranty (home use only).
Answered by: OnerousEthic
Date published: 2017-05-20

Can I use the Symmons W-400 valve to replace the valve in the W-600 in wall drain

I have a leaking valve in the W-600 in wall washing machine supply and drain fixture. I do not need to replac ethe entire fixture - jus the valve and it looks like the W-400 drain valve will work. Does it fit or do i need to buy the W-600 and just use the valve that comes with it?
Asked by: Steve
Theoretically Yes - the guts are the same. HOWEVER, BEWARE THE POOR QUALITY OF THE W-400. I bought 3 units from 2 separate Home Depot's and they all had faulty cold sides that failed to shut off at all. Sadly, doesn't seem to be the same quality that it used to be...
Answered by: DisappointedInSymmons
Date published: 2016-12-27

Is there a better handle so it can be turned on/off easier?

the straight handle is too small and hard to turn o/off.
Asked by: mrwoj
You would have to get a longer handle to get more leverage to make it easier. A small rubber or soft plastic tube slipped over thje handle would help.
Answered by: Billiebob
Date published: 2016-08-17

which way handle turn to have hot and cold

which way do you turn handle to have hot and cold
Asked by: mark
It is an ON/OFF lever and no Hot/Cold selection. Left is OFF< Right is ON
Answered by: Billiebob
Date published: 2016-08-17
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Customer Reviews

1 in. Copper IPS PE Laundry-Mate Washing Machine Valve is rated 3.7 out of 5 by 7.
Rated 5 out of 5 by from This Symmons valve is an excellent product, with a lifetime warranty for home use. After 20 yea... This Symmons valve is an excellent product, with a lifetime warranty for home use. After 20 years, mine no longer shuts off the hot water. This morning, I called Symmons, and they are sending me a new valve for free!!! WOO HOO! American quality at an affordable price!!
Date published: 2017-05-19
Rated 5 out of 5 by from The unit was an exact replacement of the one I... The unit was an exact replacement of the one I have. Worked well.
Date published: 2017-07-11
Rated 5 out of 5 by from These are great valves. It lasted 36 years. Called Symmons 4 months ago and they kindly sent me a... These are great valves. It lasted 36 years. Called Symmons 4 months ago and they kindly sent me a new valve with new washers. Customer service person was very nice and approved the warranty without jumping through hoops! I've read the other negative reviews. There could be many causes for problems not related to the quality of the valve. Like if a new valve doesn't close on the cold side but closes on the hot side. The tap water across the US can be different, some may have more sediment and sand/particles that could pose a problem with the valve, especially when turning the main shut-off valve back on, there could be a large amount of sand and even tiny pebbles entering the pipes, where as the hot water side is coming from the hot water heater where the sediment and sand would rest at the bottom of the water heater tank and outputting a lot less sediment and sand particles unless it's a tankless water heater where there isn't a storage tank. Sediment and sand particles can not only cause valves from working properly, it also can clog the aerator screens and flow restrictors (California Title 20 Water-Efficiency Standards) in faucets. Sometimes I've experienced about 90% loss of water flow at a faucet and shower head because the aerator screen was clogged with sand and small pebbles after I turned the main water valve back on slowly. Ceramic discs in valves are also susceptible to damage from sand and small pebbles. Also when someone sweats/solder a copper fitting to the Symmons brass elbow fitting while it's attached to the valve housing, the extreme heat from the torch could compromise the gasket/seal. Whatever the seal/gaskets are made of, mine lasted 36 years, washing about once a week. So using the Symmons valve 3-4 times a week vs once a week could make a difference of the lifespan theoretically unless it's more about corrosion than wear and tear. As far as I know and according to the Symmons website, these valves are made in the US, not China. If it says made in China, you might own a knock off. Also tap water across the US has different levels of chlorine and disinfection byproducts from high levels of organics in both the surface and groundwater supplies which can damage rubber seals in toilet flappers and valves, sink valves, hose bib valves, angle stops and the Symmons valve seals. Some companies offer lifetime warranties but want pictures, receipts, jump through hoops and at the end, won't honor the warranty like Red Dot® electrical outdoor outlet face plates and Irwin tools 1/4" drive extension bit holders.
Date published: 2017-06-23
Rated 1 out of 5 by from DO NOT BUY - THIS IS THE POOREST QUALITY PRODUCT I HAVE EVER PURCHASED. Bought 3 defective in a r... DO NOT BUY - THIS IS THE POOREST QUALITY PRODUCT I HAVE EVER PURCHASED. Bought 3 defective in a row. I had a 10 year old W-400 where the cold side was completely blocked, letting no water through regardless of the position of the lever. While not happy that the product failed after ten years of light use (we use that laundry machine once every 2-3 weeks), I figured that at least I got twice the waranteed life of 5 years. I bought the W400 since it was cheaper (and faster) to unscrew and replace the whole assembly than to buy the repair kit. Plus, I figured better to get all new parts and washers. A 27 dollar and 10 minute fix. To make a long story short, I went to Home Depot THREE times and tried 3 different W-400 boxes. Each time, the cold side failed to close, letting through a full stream of water, regardless of the position of the handle. Note that the hot side did shut off completely when the handle was slid to off. The first time, I was unprepared for such a part failure and I flooded the entire first floor laundry room with water pouring through the floor boards into the basement... Given that there is seemingly no way for even an amateur to mess this installation up, I can only blame the quality of the part. Perhaps it was a bad batch? (though I bought the 3rd one at another local Home Depot just in case). Still NO EXCUSE for such poor quality control (or lack thereof) So after wasting the better part of my day off going back-and-forth to Home Depot along with installing, deinstalling, reinstalling, deinstalling, reinstalling the same part plus wasted time cleaning up my flooded laundry room and basement, I still don't have a working shutoff switch. I guess the only minor consolation is that now that it is stuck in the on position, I can at least do my laundry (before the cold was stuck in the off position). Symmons, if you are reading this, I deserve better than an apology for my day of troubles, 3 trips to Home Depot, and a flooded laundry room.
Date published: 2016-12-26
Rated 5 out of 5 by from Quality product, exact replacement. Name brand product made in China, it appears to be a quality product. Exact fit except. the ON/OFF lever does not line up with the slot in the valve cover.. The lever on the replacement is a different configuration than the original. Had to use the original lever.
Date published: 2016-08-16
Rated 1 out of 5 by from Seemingly Poor Design I installed this valve with relative ease – it just required sweating on two fittings and then screwing the valve body to them (but this is the way other valves in this class work). However, when I tested the valve, by opening and closing it, it wouldn’t shut off completely – water kept coming out but with a reduced flow. This was problematic as it required me to turn off the main water till I could get a replacement – which was the next day! Fortunately, the replacement worked. The valve is designed in such a way that its action is binary: it’s either completely on or completely off. When it’s not connected to a washing machine, this can be quite jarring because it opens up to full blast immediately, and, when it closes, it shuts off with a giant BANG! (This can’t be good for the rest of the plumbing in the house.) Admittedly, this doesn’t happen when a washing machine is connected – because there’s little or no flow when the valve is actuated – but having nothing attached should also be a valid operating condition. And, it appears that the shutoff mechanism uses rubber washers, which I feel will be damaged by the violent action, and which are much more likely to wear out over time than, say, a Teflon ball valve (which is what’s used in a competing product) would. It will be a while before I get over the fact that I had to have my main water off for an extended period of time due to a defective part from this company. And, I’m still uneasy about its ability to stop the flow of water if one of my hose connections should break – which is its main purpose. Either I’m missing something or this valve is poorly designed.
Date published: 2013-11-21
Rated 4 out of 5 by from Direct Replacment This was a direct replacement of an existing mixer valve. I merely replaced the guts of the old valve with the new one so that it was not necessary to un-sweat the old valve.
Date published: 2013-10-22
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