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Piston Assy 1.6Gpf F/Pedal Toilet Fv
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- Piston Assembly
- Department:
- Plumbing
- Parts and Accessories Type:
- Toilet
- Application:
- Toilet
- Country of Origin:
- China
American Standard M964905P-007130A – Frequently Asked Questions
1) What does the American Standard M964905P-007 piston assembly do in a flush valve?
It's the internal piston cartridge for an American Standard pedal-operated toilet flush valve rated at 1.6 gallons per flush. The piston is the part that meters the flush: when the pedal is pressed it lifts off its seat, passes the metered volume, then reseats to close the valve. Worn or scaled pistons are the usual cause of a valve that runs on, short-flushes, or won't shut off.
2) Why are there two versions of the M964905P-007 piston, and which do I order?
Two are offered: a polished nickel version, MPN M964905P-007130A, and a no-finish (raw) version, MPN M964905P-0071600A. The difference is the plating on the exposed metal. For a rebuild where nothing is visible once the cover is on, the no-finish part is the functional equivalent. Choose polished nickel if you're matching exposed trim on the valve.
3) My flush valve keeps running after the pedal is released. Is the piston the fix?
Usually, yes. A valve that runs on is normally a piston that won't reseat, from grit under the seat or a worn relief seal. Replacing the piston cartridge with the matching 1.6 gpf assembly restores shutoff without pulling the valve body off the supply. Shut the control stop first, then open the valve cover and lift the old cartridge out.
4) Will this work on a hand-lever flush valve or only the foot pedal version?
It is specified for the pedal-operated American Standard flush valve. Pedal valves use a different actuating arrangement than a standard handle valve, so match the part to a pedal valve. If the fixture on your wall is a conventional lever handle valve, order the piston kit for that valve instead.
5) Is the 1.6 gpf rating set by the piston itself?
Yes, on a piston-type valve the flush volume is governed by the cartridge, so installing the 1.6 gpf piston is what keeps the valve delivering 1.6 gallons. If you are chasing a water-use target across a building, swapping pistons is how you standardize the fleet without changing valve bodies. Don't mix volumes across identical fixtures or your flush performance will vary door to door.
6) Do I need to replace the whole flush valve or can I just rebuild it with this part?
For a leaking or mis-metering pedal valve, the piston rebuild is the first move: the valve body, supply, and spud stay in place and only the internal cartridge changes. Replace the whole valve only if the body itself is damaged or the chrome is beyond saving. For a property manager running many identical pedal fixtures, stocking pistons is far less disruptive than valve replacement.
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Does the American Standard M964905P-007130A come with a warranty?
Absolutely. The American Standard M964905P-007130A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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