American Standard Flash Shower...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$132.39
$84.79
American Standard Flash Shower Rough-In Valve With PEX Inlets/Universal Outlets With Screwdriver Stops for Crimp Ring System - AMS-RU107SS

American Standard Flash Shower Rough-In Valve With PEX Inlets/Universal Outlets With Screwdriver Stops for Crimp Ring System - AMS-RU107SS

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Model: RU107SS
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$132.39
$84.79
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Flash Shower Rough-In Valve With PEX Inlets/Universal Outlets With Screwdriver Stops for Crimp Ring System
  • Flush Plug: Eliminates the need to remove cartridge during installation and allows installer to flush the lines without cross flow. Can be tested using flush plug with air (200 psi) or water (300 psi).
  • Stainless Steel Retaining Ring with Flats: Secures test cap/ cartridge in place and eliminates need for screws. Flats make it simple to loosen ring for quick, easy insertion/removal of test cap/cartridge.
  • Flat Back: Allows valve to be mounted flush against cross brace for easy and solid installation
  • PEX Connections: Fast and easy installation without adaptors reducing leak points.
  • Cast DZR Brass Valve Body: Resists corrosion due to high chloride and pH levels in water.
  • Back-to-Back Capability: Hot and cold can be reversed quickly and easily.
  • Exclusive Plaster Guard: Plaster guard is designed to protect valve and act as a guide during installation. It can serve as mounting support for thin-wall installations.
  • Wide Rough-in Range: From 1-3/4" to 2-3/4" from finished wall to the back of the valve.
  • 1/2" PEX crimp inlets/Universal outlets (ASTM F1807)
  • Includes Scredriver Stops for easy servicing at the valve;Cartridge Ships with Trim

Manufacturer Resources

Spec Sheet

Product Specs

Product Group:
Washroom/Bath Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Rough In Valve
Department:
Plumbing
Parts and Accessories Type:
Rough-In Kit
Application:
Toilet

American Standard RU107SS – Frequently Asked Questions

1) Does the American Standard Flash RU107SS shower rough-in valve come with the cartridge and trim?
No. The RU107SS ships as the valve body only, with screwdriver stops and a flush plug installed. The cartridge comes packed with the trim kit, so you have to order the Flash trim separately to finish the shower. That is deliberate on this design: you rough in and pressure test the wall without ever exposing a cartridge to debris.
2) What pipe connections does the Flash RU107SS rough-in valve take?
Inlets are 1/2 inch PEX crimp, made to ASTM F1807, so they go straight onto PEX with a crimp ring and no adaptors. The outlets are universal. If your supply runs are copper, you will need to transition to PEX or pick a copper sweat version of the Flash valve instead.
3) How deep can the wall be for a Flash shower valve rough-in?
The rough-in range runs 1-3/4 inch to 2-3/4 inch measured from the finished wall surface to the back of the valve. That one inch of play covers most stud-and-backer assemblies, tile over cement board included. The plaster guard doubles as a depth gauge while you set it, and on thin-wall installs it can carry the mounting support itself.
4) Can I pressure test the line before the shower trim goes on?
Yes, that is what the flush plug is for. It stays in place of the cartridge so you can flush the lines without cross flow between hot and cold, and you can test at 200 psi with air or 300 psi with water. No need to install and then pull a cartridge just to test.
5) I piped the hot and cold backwards. Do I have to re-pipe the wall?
No. The Flash valve body has back-to-back capability, so hot and cold can be reversed at the valve quickly rather than re-running supplies. That is the same feature that lets you use one valve on back-to-back bathrooms sharing a wall where the supply orientation flips.
6) Can I shut off water at the shower valve for service, or do I have to kill the whole riser?
The RU107SS includes integral screwdriver stops, so a maintenance tech isolates hot and cold right at the valve behind the escutcheon and services or swaps the cartridge without shutting down the branch or the building riser. For multi-family and hotel work that is the reason to spec the SS version over a stopless body.
7) Is this shower valve body OK for aggressive municipal water?
The body is cast DZR brass, dezincification resistant, chosen to hold up to high chloride and high pH water. The test cap and cartridge are held by a stainless steel retaining ring rather than screws, so the retention hardware in the wet area does not rust up either.
8) How does the Flash valve mount to the framing?
It has a flat back, so it sits flush against a cross brace between studs and screws up solid without shimming or strapping it off round stock. The plaster guard protects the valve through drywall, mud and tile work and guides the depth setting at the same time.
9) What is the exact part number to order this American Standard rough-in valve?
American Standard part number RU107SS, the Flash shower rough-in valve with 1/2 inch PEX crimp inlets, universal outlets and screwdriver stops. The SS suffix is the one that carries the stops; specify it if you want service shutoffs at the valve.
How fast can I get the American Standard RU107SS delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the American Standard RU107SS come with a warranty?
Absolutely. The American Standard RU107SS is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the American Standard RU107SS?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the American Standard RU107SS from ZenSupply?
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