The Rubberflex handle provides the industry’s simplest, most cost effective maintenance with fewer leaks and tighter seals. Plus all Ultra and Delany flush valves feature the market’s only replaceable Main Valve Seat, allowing contractors to fully flush the supply lines at installation, alleviating the worry of clogged diaphragms from construction and installation debris. The replaceable nature of the Seat also allows for cost effective replacement if it were to become damaged or scored, unlike competitors’ diaphragm valves which must be completely replaced due to the built in design of their valves.