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PressureSystems - About Seaward Heaters
Rated for service at pressures of 5 bar or more, these robust US-made aluminium cylinders are suitable for use with any make of pressure-controlled water pump.  The cylinder itself is thermally insulated and enclosed in a smart steel case (galvanised, enamelled & stainless steel options).  Seaward heaters are factory-fitted with an AC electric immersion heater.  Full safety protection is provided by twin thermostats and a temperature-and-pressure-relief valve.