The Watts 994RPDA is a reduced pressure detector assembly (RPDA). It is available in 2 1/2″-6″ sizes and has been in production since 1999. The body is made of stainless steel. The 994RPDA utilizes a 3/4″ 009M3 for the bypass assembly. The 994RPDA is a Watts private label of the Ames 5000SS.