I need to use a pressure washer outside my house, but there's no spigot nearby. I do have my tankless gas water heater nearby though, which has drain valves (both hot and cold). When I opened up the cold water drain valve cap (circled in red) and turned the valve above it, cold water came out. Can I hook up a garden hose to this and feed my pressure washer? I'll turn off the gas and the power to the heater when I do this just to be safe. Thank you.
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1 Answer
From you photo it also appears to also be the water source for the heater. As long as you can draw water without closing the water valve to the heater I see no reason why you cannot use hook up a garden hose to this and feed your pressure washer or possibly as a general purpose water outlet.
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It would be wise to add a backflow preventer between the spigot and the hose. Commented Apr 12, 2022 at 6:40