Restore performance to your toilet fill valve with the Fluidmaster 385 Replacement Valve Cap, designed specifically for use with the Fluidmaster 400A series fill valves. This genuine replacement part helps fix common fill valve issues such as continuous running or slow refilling, without the need to replace the entire valve.

The cap includes the seal and locking ring, making it easy to install and ideal for quick DIY toilet repairs.

 ‎Includes adapter for older style 400A, although complete replacement of valve is recommended if more than 5 years old.