corrigendum tender for multi-layered hdpe tank with puf core insulated , puf insulated ppr pipe , ppr fitting , temperature differential controller , sensor , wire , nitrile foam, anti freezing system for water supply in high altitude region of sikkim, 500 litre capacity tank- multi-layered hdpe tank with uv stabilized 100 percent food-grade virgin inner liner. pre insulated with high-pressure machine-injected minimum 40mm thick cfc-free rigid puf core insulation layer , density - min 48 kg/cum. includes threaded self-locking lid with heavy-duty hexa-bolts to withstand extreme wind/snow loads. suitable for -40c to 40c thermal stability., 750 litre capacity tank- multi-layer hdpe tank with uv stabilized 100 percent food-grade virgin inner liner. pre insulated with high-pressure machine-injected minimum 40mm thick cfc-free rigid puf core insulation layer , density - min 48 kg/cum. includes threaded self-locking lid with heavy-duty hexa-bolts to withstand extreme wind/snow loads. suitable for -40c to 40c thermal stability, 2000 litre capacity tank- multi-layer hdpe tank with uv stabilized 100 percent food-grade virgin inner liner. pre insulated with high-pressure machine-injected minimum 40mm thick cfc-free rigid puf core insulation layer , density - min 48 kg/cum. includes threaded self-locking lid with heavy-duty hexa-bolts to withstand extreme wind/snow loads. suitable for -40c to 40c thermal stability, puf insulated ppr pipe of size 32 mm- pn 20, 3 layer, puf insulation-40mm thick & 48 kg/cum dense, with outer protective layer of 3 mm pvc, puf insulated ppr pipe 32 mm od with self-regulating heat tape, 35w/mtr and m20 connector for termination at both ends, ppr pipe- 40mm, puf density 48 kg/cum with 3 mm thick outer pvc protective layer, puf insulated ppr pipe 20 mm od with self-regulating heat tape, 35w/mtr and m20 connector for termination at both ends, ppr pipe- 40mm, puf density 48 kg/cum with 3 mm thick outer pvc protective layer, ppr elbow , for pn 20pipe 3 layer-32 mm size, ppr elbow , for pn 20pipe 3 layer-20 mm size, ppr tee , for pn 20pipe 3 layer-32 mm size, ppr tee , for pn 20pipe 3 layer-20 mm size, ppr union , for pn 20pipe 3 layer-32 mm size, ppr union , for pn 20pipe 3 layer-20 mm size, ppr half bend- 32 mm size, ppr half bend- 20 mm size, temperature differential controller for automatic on/off operation of heat tape, programmable on below 10 degree c, cut off at 15 degree c. additional 2 pole 16a mcb for heating element load, manual operation, pt 100 sensor with 10 mtr signal wire, 3 core 1.5 sqmm copper wire, black duct tape for protection for nitrile foam to be used on joints with insulation aluminum tape for cladding of nitrile foam joints