supply of heavy dutyheavy duty,heavy duty brass body spring loaded non return valve to size 1 (inch) bsp female threads, c lass: type 1, position : horizontal to is 778:1984. [ warranty period: 12 months after the date of delivery ] ] , heavy duty brass body spring loaded non return valve to size 3/4 (inch) bsp female threads, class: type 1, position : horizontal to is 778:1984. [ warranty period: 12 months after the date of deliver y ] ] , heavy duty brass body spring loaded non return valve to size 1/2 (inch) bsp female threads, class: type 1, position : horizontal to is 778:1984. [ warranty period: 12 months after the date of deliver y ] ] => limited