402 range of single check valves. WRAS approved materials. Epoxy coated GJL cast iron body with two un-drilled bosses, 202 Stainless Steel spring and EPDM seal. Closing system Brass on 40mm bronze on others, guide bronze Maximum working pressure for clean water is 16.0 Bar up to 6" and 10.0 Bar 8" and above. Maximum temperature 100oC.