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White plastic anti-siphon fill valve with Leak Sentry component

FLUIDMASTER

FLUIDMASTER Anti-Siphon Fill Valve with Leak Sentry

SKU CH-0JQ0-XMDZ9

Anti-siphon fill valve with Leak Sentry technology prevents back-flow and alerts you to leaks

  • TypeAnti-Siphon With Leak Sentry(TM)
  • Anti-siphon design prevents water supply contamination
  • Leak Sentry feature detects and stops silent leaks
  • Five-year manufacturer warranty included
  • California Proposition 65 chemical warning applies

Anti-Siphon Fill Valve With Leak Sentry

This Fluidmaster fill valve replaces the inlet assembly in a standard toilet cistern. The integrated Leak Sentry feature prevents continuous water loss by stopping refill when a flapper leak is detected. It suits homeowners and maintenance staff who want a drop-in repair part that addresses both supply safety and silent waste. The unit carries a Proposition 65 notice for California buyers.

Thermals Noise And Power Draw In Normal Use

The valve operates on mains water pressure and requires no electrical supply, so it generates no heat and draws zero power. Mechanical action is limited to the float and seal movement during each flush cycle, producing only the normal sound of water entering the tank. No fan, pump or active cooling is involved.

Highlights

  • Anti-siphon design prevents water supply contamination
  • Leak Sentry feature detects and stops silent leaks
  • Five-year manufacturer warranty included
  • California Proposition 65 chemical warning applies

Specifications

BrandFLUIDMASTER
TypeAnti-Siphon With Leak Sentry(TM)

Questions about this item

How is the anti-siphon fill valve installed and which step is often missed?

Turn off the water supply, flush the tank, remove the old valve, insert the new valve through the tank hole, secure the locknut, attach the refill tube to the overflow pipe, and turn the water back on; the step often missed is clipping the refill tube above the overflow pipe so it does not siphon.

What maintenance or replacement will the Leak Sentry fill valve need later?

The internal seal and float assembly may wear after several years; replace the seal kit if the valve runs continuously or fails to shut off at the correct water level.

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