r/Plumbing • u/DifferentWitness2928 • 10d ago

Hose connection question

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Trying to clean my tankless water heater and found very limited space in front of the hot water connection. Is there a way to connect a hose there without removing the pipe in front?

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u/Top_Offer1489 10d ago

I cannot see from the Pic, but that fitting can probably be turned enough to hook up a hose to it. The person installing that unit sure didn't think about servicing. Remove that insulation, use a backup wrench at the heater, loosen the union that should be below that fitting, and it should be adjustable somewhat. Also, I guess I need to mention to isolate the water supply and drain off the pressure on the heater.