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I am having the floorcovering replaced in the laundry room, where my water heater is located. When the plumber temporarily removes the water heater, will I still have use of the cold water throughout the home, until the plumber reinstalls the water heater? It may be a day or two. Thanks!

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  • Should have. Most hot water heaters get their cold water from a tee with a shut off valve.
    – crip659
    Aug 9, 2022 at 14:34
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    If the valves isolating the water heater are correct, yes. If the valves are not correct or not there at all, no.
    – Ecnerwal
    Aug 9, 2022 at 17:08
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    That depends on whether the shutoff valves are present to successfully do that. Note George Anderson's comment that many valves when open will backflow cold water up their hot line, and you could have a flood in the laundry room if that is not closed off with a valve or capped off. Aug 10, 2022 at 22:43
  • When the plumber temporarily removes the water heater, will I still have use of the cold water throughout the home, until the plumber reinstalls the water heater? That's correct. You only get hot water via hot water heater tank or tankless Mar 15, 2023 at 18:31

1 Answer 1

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If the plumber does their work correctly, yes.

Typically, there should be a shut-off valve just for the water heater. They would turn off water to the water heater, then work on it (after capping the hot water line). You would only lose hot water to the house.

Even if there's not, then a competent plumber would install one. That's a 15-minute job. Then you would still get cold water during the works.

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    One thing to be careful about is the hot water line from the water heater should be capped when the WH is removed. Mixing valves on sinks, etc. can backflow cold water into the HW pipe and then it comes out at the WH making a mess. Turning the valve to full cold should prevent that, but that's easy to forget. A simple cap installed on the HW line is good insurance. Aug 9, 2022 at 15:33
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    @GeorgeAnderson This should be the answer. IF the hot water side isn't capped, then I would bet 100% that someone in the house will mix the cold water into the hot side at another fixture. Aug 9, 2022 at 18:54
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    @RibaldEddie edited to add this detail. It wouldn't have crossed my mind that a plumber would not think of capping the hot water line. But yeah, this is DIY, and it could guide the next DIY'er to not forget this step.
    – Jeffrey
    Aug 9, 2022 at 20:01
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    Mine has a valve on the inlet and outlet so closing them will isolate the system. You could always connect the pipe feeding the hot water heater to the pipe that is connected to the outlet of the hot water if that is easier.
    – Gil
    Aug 9, 2022 at 22:58
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    Note that while installing a shutoff valve is a 15-minute job for a plumber, in my area plumbers charge $200+ to do this - even while replacing the water heater :o
    – mmathis
    Aug 10, 2022 at 17:27

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