Fluidmaster® recommends using the 400LS fill valve in toilets that date prior to 1994 with flush volumes between 7 gal per flush and 3.5 gal per flush. The 400LS LEAK SENTRY® universal water-saving toilet fill valve has all the same benefits of the 400A fill valve, plus it comes with leak prevention technology and a water-saving roller clamp. Leak prevention technology stops the automatic refill of the toilet tank due to a worn or faulty flapper. The included roller clamp allows you to regulate the amount of water refilling the toilet bowl for maximum efficiency. Quickly replace inefficient, outdated and leaky toilet fill valves with this water-saving design. The 400LS is a code approved, anti-siphon design, that won't contaminate the fresh water supply. Some toilet models not supported - Glacier Bay® or Niagara® flapperless toilets, one-piece toilets.

• Fixes noisy toilets and detects leaks
• Easy-to-install, universal fit
• Leak Sentry® prevents the automatic refill of a leaky tank
• Water-saving roller clamp lets you regulate the fill level in the bowl
• EZ twist height adjusts from 9 to 14 in to fit most tanks
• Leak Sentry® automatically suspends refills and alerts users to leak before money and water are wasted
• Toilet easily resets, remains fully operational
• Saves up to 3000 gal of water per year

• https://assets.unilogcorp.com/187/ITEM/DOC/FLUIDMASTER_100002945_Catalog.pdf Catalog
• https://assets.unilogcorp.com/187/ITEM/DOC/FLUIDMASTER_100053796_Instruction_Installation_Manual.pdf Instruction/Installation Manual