Most powerful fill valve on the market. The 400AH is also known as the 400ARHR. Fluidmaster recommends the PerforMAX® fill valve for toilets manufactured from 1994 to the current time. Works with all toilets, including Kohler®, Toto® and American Standard®.
Universal fit, perfect for:
• High efficiency toilets (HET 1.28 gal.)
• Dual Flush including DUO FLUSH™
• 1.6 gpf toilets with 2″ & 3″ flush valves (1994 & newer)