R & D Multiple’s Dual Plate Check Valves combine the best features with top class workmanship making them unique for any kind of waterworks applications. The clamped resilient seat on Body is a feature which combines high seal integrity & assurance against seal wash-off. Considering features as above & many others, R & D Multiple’s Dual Plate Check Valves will give you the best in areas of Features, Workmanship, Initial & running costs. This is the best choice.