Not Enough Water in Toilet Bowl: Fix it with Fluidmaster PerforMAX® Fill Valve 

* Quietest, most powerful solution to fix and upgrade your toilet
* Easy to install, Universal fit
* 2X greater bowl refill delivers a more powerful flush for 1.6 or lower GPF toilets
* Water saving roller clamp lets you regulate the fill level in the bowl
* Best for newer, high efficiency toilets (HET), 1.6 gallons or less
* EZ-Twist height adjusts from 10″ to 15″ to fit most tanks
* 7 year warranty
Fluidmaster® recommends the PerforMAX® fill valve for toilets manufactured from 1994 to the current time (works on older toilets). If you are replacing the fill valve, we recommend you also replace the flapper with the 502 flapper for the best performance. The 502 flapper works on both old and new 2 inch flush valve toilets.
The most powerful toilet fill valve on the market. The 400AH is also known as the 400ARHR. With efficient and ultra-quite fill the 400AH replaces other inefficient, or outdated fill valve designs. Help prevent excessive or inadequate bowl fill levels. The 400AH 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. Does not replace Side Entry Valves.
It is recommended that you replace the flapper along with the toilet fill valve for best performance. Here are the videos of the flappers you can choose from: • Toilet Flapper Install...