American Standard Flash Shower Rough-In Valve With CPVC Inlets/Universal Outlets - AMS-RU109

No. The RU109 valve body ships without the cartridge, which comes with the trim kit instead. Order the Flash trim separately, and it brings the cartridge with it. During rough-in the body uses a flush plug and test cap rather than the cartridge, so you can pressure test and flush the lines before the cartridge ever goes in.

The rough-in range runs from 1-3/4 inches to 2-3/4 inches measured from the finished wall to the back of the valve body. That one inch of tolerance is what lets you work with varying backer and tile thicknesses without resetting the valve. The plaster guard acts as a depth guide during setting, and on thin-wall builds it also serves as mounting support.

Inlets are 1/2 inch CPVC, so CPVC supply lines solvent-weld straight to the body with no adaptors and no extra joints to leak. The outlets are universal, meaning the showerhead riser and tub spout drop connections are not tied to a single pipe type. If your supplies are copper or PEX, you would be adding transition fittings at the inlets rather than connecting direct.

Yes, and without pulling a cartridge. The flush plug in the RU109 lets you test with air at 200 psi or water at 300 psi, and it also lets you flush the supply lines without cross flow between hot and cold. A stainless steel retaining ring with flats holds the test cap in place, so no screws are involved and the cap loosens by hand tool when you are ready to swap in the cartridge.

Not with this valve. The Flash RU109 body has back-to-back capability, so hot and cold can be reversed quickly at the valve rather than repiping the wall. That is the usual reason this body gets specified on mirrored bathroom pairs in multi-family and hotel work.

Yes. The body has a flat back specifically so it sits flush against a cross brace for a solid mount, instead of needing shims or a bracket to keep it square. The plaster guard doubles as mounting support, which matters on thin-wall or panel construction where there is no framing right behind the valve.

The manufacturer part number is RU109. It is the valve body only, in an unfinished rough-in casting, since nothing on it is visible once the wall is closed and the trim covers the opening.

The valve body is cast DZR (dezincification resistant) brass, chosen to resist corrosion where water carries high chloride content or high pH. For a facility standardizing shower rough-ins across many units, that is the material spec to compare against a standard brass body.