Description Gerber Fast Fill Adjustable 8 to 12 inches Tall Anti-Siphon Fill Valve Adjustable water height toilet fill valve (Adjustable 8″-12″ Height) to fit short and tall tanks Anti-Siphon Fill Valve Water Saver Corrosion-resistant ABS Universal fit for both 1 piece and 2-piece toilets that are bottom water fed with a 7/8″ pipe connection Fixes: running, noisy, slow refill, and weak flushing toilets Easy to Install How to Install a Universal Fit Tower Fill Valve in Your Toilet