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

UNIVERSAL FILL VALVE