The purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building. An air admittance valve is a one way valve designed to allow air to enter the plumbing drainage system when negative pressures develop in the piping system. The device shall close by gravity and seal the vent terminal at zero differential pressure (no flow conditions) and under positive internal pressures.

Fix noisy or slow filling toilet with the quietest, most powerful toilet fill valve
A fill valve with both tank and bowl water control for a more powerful
flush
The adjustability of the bowl water helps newer, 1.28 gpf and lower flow toilets flush efficiently
Easy to install
Universal fit for most toilets
2X greater bowl refill for a more powerful flush than standard designs
EZ-Twist height adjusts from 9 to 14 in to fit more tanks

TOILET FILL VALVE ADJUS FLAPPER

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 Quickly replace inefficient, outdated and leaky toilet fill valves with this water-saving design.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.

UNIVERSAL FILL VALVE