supply of purg-o-mat automatic float air vent valvepurg-o-mat automatic float air vent valve,set of purg-o-mat automatic float air vent valve for overhead roof water tank and vaccum valve consisting of following items. (1) purg-o-mat automatic float air vent val ve with shut off valve having thread bsp 3/8 to rcf drg. no. lw 63150. item no. 4 alt b qty-0 1 nos. (2) vaccum valve g-1/2 to rcf drg. no. lw 63150, item no. 3, alt b qty-02 nos. as per drg .no. 1. rcf drg. no. lw 63150 and 2. drg. no. lw63150 specn: (1) purg-o-mat automatic float air vent valve with shut off valve having thread bsp 3/8 to rcf drg. no. lw 63150, item no. 4 alt b qty-01 nos./set (2) vaccum valve g-1/2 to rcf drg. no. lw 63150, item no. 3, alt b qty-02 no s/set. [ warranty period: 30 months after the date of delivery ] ] => limited