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a large 30 gallon (135 litre) insulated
water boiler with stainless steel fittings (including the element)
a 20 gallon (90 litre) cold water tank
with brass ball float-valve (no solenoid valves), and 2 electric
pumps. These pumps can supply hot or cold water - under pressure
- on demand.
a 24-hour or 48-hour time clock. |