supply of set of purge-o-mat automatic float air ventset of purge-o-mat automatic float air vent,set of purge-o-mat automatic float air vent valve and vacuum valve for roof water tank 30l mounting for lhb coaches. 1) purg-o-mat automatic float air vent valve with shut-off valve having thread bsp 3/8 inch to rcf drg. no. lw63150, item-4, alt-e, qty/set: 1no. 2) vacuum valve g-1/2 inch to rcf drg. no. lw63150, item-3, alt.e, qty/set: 2 nos. note:(1) as per drawing air vent valve and shut-off-valve must be procured from m/s hans h. voss tulpenweg or m/s calefi or m/s watts industries italy. (2) one advance sample to be got approved by the consignee for functional requirements before bulk supply. [ warranty period: 30 months after the date of delivery ] ]