Description Jacuzzi HB66000, GU910000 Toilet Fill Valve Replacement Fits Jacuzzi HB66000, GU910000 Adjustable 8″-12″ height to fit short and tall tanks Anti-Siphon fill valve for water saver toilets Corrosion-resistant material Universal fit for both 1- 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