supply of the set of following itemsthe set of following items,electrical push button (1 no+1 nc) with green led indicator designed for press urised flushing system, as per mdts 19027. rev.01 of make: spac item code spac.0011223 or si milar make, functionally compatible in pressurised flushing system of indian railway coach es fitted with pressurized flushing system of spac .(sample to be approved before bulk supply) [ warranty period: 30 months after the date of delivery ] ] , supply of piston head water side suitable for oasis make water pressurizer unit having part n o. ofpfs10000-1 or similar(sample to be approved before bulk supply) [ warranty period: 30 mont hs after the date of delivery ] ] , complete seal kit with o-ring for pfs-oasis part no. ofeppfs21000or similar or co mplete seal kit with o-ring for pfs-oasis part no.- ofeppfs21000 or similar. similar means it should be fu nctionally similar in oasis pressurize flushing system, (material used for repairing eppfs of lhb coaches)sa mple to be approved before bulk supply. [ warranty period: 30 months after the date of delivery ] ] , water locking unit with angle seat valve-3/4 for electro pneumatic pressurized flushing syst em of lhb coaches as per mcf specification mmdts 19027, functionally compatible in eppfs of ir coaches to spac item code: spac.0011042 or equivalent. supplier to get 2 nos. advance sample approved from the consignee [ warranty period: 30 months after the date of delivery ] ] => limited