Product water storage tank made of food-quality Polyethylene in a space saving rectangular design. The tank includes: 1 handhole diameter 400 mm, with air-tight covering cap,reinforcing braces made of galvanized steel 1 PVC safety overflow DN32 1 PVC product water inlet connection 1 PVC product water outlet connection incl. d25 closing valve 1 level sensor for 4-20mA signal for automatic control of the RO-unit: ON/OFF as well as dry-run protection for the permeat-pump. Display of level content in percent via display. Compatible with all Protegra CS RO, Protegra CS Pro and Ultra Clear RO series. Product water storage tank made of food-quality Polyethylene in a space saving rectangular design. The tank includes: 1 handhole diameter 400 mm, with air-tight covering cap,reinforcing braces made of galvanized steel 1 PVC safety overflow DN32 1 PVC product water inlet connection 1 PVC product water outlet connection incl. d25 closing valve 1 level sensor for 4-20mA signal for automatic control of the RO-unit: ON/OFF as well as dry-run protection for the permeat-pump. Display of level content in percent via display. Compatible with all Protegra CS RO, Protegra CS Pro and Ultra Clear RO series.