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Pentax waterpump smart head is a non-adjustable electronic device that automatically controls the operation of the pump. It replaces a pressure tank, pressure switch and float switch. If your water tank runs dry, the pump will shut off immediately. Brand: Rotoplastic Features: Pump body cast iron with threaded inlet and outlet, motor bracket aluminium, impeller in noryl or in brass, mechanical seal ceramic-graphite, motor shaft stainless steel AISI 416, liquid temperature 0 - 50 ?C and operating pressure max 6 bar. Smart head Option includes: switch for manual pump starter, special non-return value which avoids surges, security system to avoid the pump running with no water and pressure gauge. 3/4hp