bids are invited for cylindrical vertical water tank (1000 ltrs) with accessories as per item description.make: sintex /vectus/supreme.(colour : white/green) - cylindrical vertical water tank (1000 ltrs).(a) provn of rotational moulded polyethylene water storage tanks with lid, cylindrical vertical type, three layer 1000 ltr capacity, ‘isi’ marked confirmingto is1 2701:1996 (reaffirmed-2006) edition 2.2, and as per general technical requirements. make: sintex /vectus/supreme.(colour : white/green)(b) the tank shall be durable for a minimum pd of 1 yr under normal service temperature conditions from ± 50 degree c.the firm shall furnish guarantee to this effect.(c) the water tank meant for outdoor use shall be manufactured from carbon black compound polyethylene. the carbon black content shall be 2.0 to 3.0%.(d) the following accessories would also be required for the fitting of water tank :-isi marked make jindal/tata (i)gi nipple 150 mm long, 20 mm dia - 02 nos(ii) tank nipple 20 mm dia - 02 nos(iii) gi socket 20 mm dia - 02 nos (iv) bib cock cp brass alloy 20 mm dia - 01 nos (v) float valve brass 20 mm dia - 01 nos , cylindrical vertical water tank (2000 ltrs) with accessories as per item description.make: sintex /vectus/supreme.(colour : white/green) - cylindrical vertical water tank (2000 ltrs).(a) provn of rotational moulded polyethylene water storage tanks with lid, cylindrical vertical type, three layer 2000 ltr capacity, ‘isi’ marked confirmingto is1 2701:1996 (reaffirmed-2006) edition 2.2, and as per general technical requirements. make: sintex /vectus/supreme.(colour : white/green)(b) the tank shall be durable for a minimum pd of 1 yr under normal service temperature conditions from ± 50 degree c.the firm shall furnish guarantee to this effect.(c) the water tank meant for outdoor use shall be manufactured from carbon black compound polyethylene. the carbon black content shall be 2.0 to 3.0%.(d) the following accessories would also be required for the fittin