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The FLUIDMASTER INC 400LSRP4 is a toilet fill valve kit designed for licensed plumbers and professional service technicians. Each kit includes a 400A fill valve paired with the Leak Sentry device, which detects slow tank leaks and prevents the valve from automatically refilling the tank until the issue is addressed. The kit also includes a bowl refill adjustment clip. This combination gives installers a code-ready, service-grade solution for residential toilet tank repairs and replacements. Sold in a pack of four units, it is well suited for multi-unit service calls or inventory stocking.
This kit is intended for residential toilet tank installations where leak prevention is a priority. The Leak Sentry device is particularly useful in rental properties, multi-family housing, and commercial restroom applications where undetected silent leaks can drive up water costs over time. The 400A fill valve is a widely recognized aftermarket replacement component used across a broad range of toilet tank configurations.
Designed as an OEM-style replacement fill valve kit for standard residential toilet tank installations.
Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply valve at the wall before removing the existing fill valve. Follow all applicable local plumbing codes, including IPC guidelines, for toilet tank component replacement. Do not overtighten the lock nut securing the valve to the tank, as this can crack the porcelain.
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