Salamander NP 50 - Pearl Regenerative Twin Shower Pump (1.50 Bar) Tough, easy to fit general purpose booster pumps. Designed purely to boost the hot and cold supplies to thermostatic or manual shower mixer valves. These pumps are positive head only. - 50ft head (1.5 bar) - 2 amps/480 watts - Continuous at 20°C 230v