American Standard Flash 3-Way ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$357.94
$307.94
American Standard Flash 3-Way Integrated Shower Diverter Rough-In Valve with Pressure Balance Valve Cartridge - AMS-RU531

American Standard Flash 3-Way Integrated Shower Diverter Rough-In Valve with Pressure Balance Valve Cartridge - AMS-RU531

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Model: RU531
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$357.94
$307.94
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Flash 3-Way Integrated Shower Diverter Rough-In Valve with Pressure Balance Valve Cartridge
  • VERSATILE INSTALLATON — Compact body and flat back for easy and solid installation
  • 3-WAY DISCRETE FUNCTIONALITY – Provides the ability to alternate water flow among 3 separate outlets
  • OPTIONAL SHARED CAPABILITY - Provides the ability to share water flow simultaneously from any 2 outlets with the addition of shared cartridge, M970730-0070A, sold separately
  • 150° COMFORT RANGE — Provides a wider, more usable temperature range when fine-tuning water for the perfect shower
  • NO SOLDERING REQUIRED — Solid brass inlet connections for fast installation without adaptors, reducing leak points
  • QUALITY PRESSURE BALANCE VALVE — Double ceramic technology ensures faster adjustment to changes in water pressure to eliminate scalding, and a guarantee of drip-free performance for life
  • EXCLUSIVE PLASTER GUARD — Protects valve and acts as a guide during installation; can serve as mounting support for thin-wall installations
  • SELF-ALIGNING SCREW HOLES — Screw holes are easy to find; simplifies reattaching plaster guard to valve body
  • EASY SERVICING — Screwdriver stops for servicing at the valve
  • COMPATIBLE TRIMS — Designed for use with select American Standard trims: Town Square S, Townsend, Studio S, Delancey, Serin and Times Square

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:
Shower and Tub
Country of Origin:
Mexico

American Standard RU531 – Frequently Asked Questions

1) Does the American Standard RU531 rough-in valve come with the pressure balance cartridge, or is that ordered separately?
The RU531 Flash 3-way rough-in ships with the pressure balance valve cartridge already included, so you are not buying that as a separate line item. What is not included is the shared cartridge, M970730-0070A, which you only need if you want two outlets running at the same time.
2) Can the Flash 3-way diverter valve run the showerhead and body sprays at the same time?
Not as it ships. Out of the box the RU531 is a discrete 3-way, meaning it sends water to one of three outlets at a time. To share flow between any two outlets simultaneously, you add the shared cartridge M970730-0070A, which is sold separately. Decide that up front, because it changes how the shower actually behaves for the end user.
3) Which American Standard shower trims work with the RU531 rough-in valve?
The Flash 3-way rough-in is built for select American Standard trim lines: Town Square S, Townsend, Studio S, Delancey, Serin and Times Square. Trim is a separate purchase, so pick the trim family first and confirm it is on that list before the valve goes in the wall.
4) Will the Flash diverter valve fit in a shallow or thin wall with 2x4 framing?
The body is compact with a flat back, which is what lets it sit solidly in tight bays. For thin-wall installs, the plaster guard doubles as mounting support rather than just a cover, and it also acts as a depth guide while you set the valve. Keep the guard on until the finished wall is done.
5) Can maintenance service this valve without opening the wall?
Yes. The RU531 has screwdriver stops built into the valve, so water can be isolated at the valve for cartridge service or trim work without shutting down a riser or cutting drywall. For a property manager with a stack of identical units, that is the difference between a 20 minute call and a plumber plus a drywall patch.
6) Is this valve anti-scald?
It uses a pressure balance cartridge with double ceramic technology, which reacts to pressure changes on the hot or cold side to prevent scalding when a toilet flushes or another fixture opens. Note that pressure balance is not thermostatic, so it holds temperature against pressure swings rather than mixing to a set degree number.
7) Do I have to solder the inlets on this American Standard Flash rough-in valve?
No soldering. The valve body uses solid brass inlet connections that take the supply directly, so you are not adding adaptors at the valve. Fewer joints in the wall means fewer places to chase a leak later, which is the main reason spec and maintenance groups standardize on it.
8) Is this a tub and shower valve or shower only?
The RU531 is listed for shower and tub applications, so it covers both a shower-only riser and a tub/shower arrangement depending on which outlets you pipe and which trim you pair it with. It is a rough-in kit, not a finished trim assembly.
9) What does the 150 degree comfort range on the Flash valve actually mean for the user?
It refers to the rotational range of handle travel dedicated to usable temperature, 150 degrees of it. Spreading temperature over a wider arc means smaller handle movements produce smaller temperature changes, so dialing in a setting is less twitchy than on a valve with a short range.
10) Why does the plaster guard have self-aligning screw holes, and do I need to keep it?
Keep it. The guard protects the cartridge and ports through framing, tile and mud work, and it guides your setting depth. The self-aligning screw holes matter on the reinstall: if you pull it to test and put it back, the holes locate without hunting, which saves time when you are setting a run of identical showers.
How fast can I get the American Standard RU531 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 RU531 come with a warranty?
Absolutely. The American Standard RU531 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 RU531?
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 RU531 from ZenSupply?
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