Mark: The Deringer Model 30 is a double check detector assembly. Production began in 2014. The Model 30 has a type 2 bypass arrangement which incorporates a single check valve. The check valves for the mainline assembly are modular in design. There are no special tools needed to service this assembly....

Mark: The Wilkins 950DA is a double check detector assembly that was manufactured in 2 1/2” through 10” sizes. Production of this model began in 1991 and was discontinued in 2004. The body is made of ductile iron and has a blue epoxy coating. The bypass assembly used for this model is a 3/4”...

Mark: The ARI model RP-501 is a reduced pressure principle assembly and started production in 2016. This series is produced in ¾”- 2” sizes. The valve body is made of a black composite plastic material. What makes this assembly very unique is the fact that the inlet and outlet shut off valves...

Mark: The Watts model 709 is a double check valve assembly. The ¾” thru 2” sizes of the 709 started production in 1979 and were discontinued in 1993. Early versions of this model utilized a bronze body and came standard with gate valves. Later versions utilized ball valves as shut off valves....