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Do I Need To Turn Off Water Heater?

I am needing to fix a bathroom faucet which is leaking, so i need to turn off the water supply to my house. The valve by the street is way too tight and will not turn. I did notice two pipes from the wall in my laundry room which come into the water heater (gas) one pipe has red valve on it. I’m assuming that might turn off the water to my house maybe? If it does, do i need to turn off the flame to the water heater for any reason while I’m messing with this stuff?

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  1. Comment by shell
    September 3, 2009 @ 8:47 pm

    If you only have the one house valve to the water, turn off everything. There is usually detailed instructions for relighting any pilot lights on the water heater, furnace, stove….The gas company will come relight anything you have trouble with. Sometimes free, sometimes with a cost. Read everything and make sure you can or cannot relight. Way worth it to call the gas company if you can’t. (or have really good insurance)

  2. Comment by Honsell T
    September 3, 2009 @ 11:52 pm

    The color of the valve shouldn’t matter, Turn the valve off and see if you have only cold water, or no water at all. If no water at all you can make the repair. And no you don’t have to mess with the flame on the gas water heater, as it has a thermostat and will still be full of water, so there will be no harm done there. If only the hot water is off, then you need to do some more investigating to find the main shut off.

  3. Comment by don_hora
    September 4, 2009 @ 2:51 am

    you shouldn’t need to turn off the water heater. it will still have 10, 20, 30, etc gal depending on size. now if you where going to have the water off for a day or more then yes turn off the gas (only to save money) but for just a quick repair don’t bother, just turn off the water line where you can and drain the system (leaving the water heater alone). side note have towels and a drip pan ready and make absolutely shore there is no water pressure before cutting a pipe or undoing a nut.
    BTW get some wd40 to fix the stuck valve if you can’t call you’re utility company to replace it (usually free maintenance service).

  4. Comment by 53classi
    September 4, 2009 @ 3:52 am

    Do not turn off the gas (red knob). Turn down the temperature on the front of the water heater to “VACATION”. Turn off the cold water pipe on
    top of the water heater. This will allow you to disassemble the HOT bathroom faucet only.
    If the COLD water faucet is leaking, you will need to turn off the whole house water supply.
    If you are unsure, call a plumber.

  5. Comment by Stephen
    September 4, 2009 @ 6:58 am

    You don’t need to shut off the water supply to the w/h. If you can’t shut the water off inside the house, go outside with a large crescent wench, take the cover off of the water meter/shutoff valve and shut the water off there. That is the valve the water company uses if you don’t pay your bill.

  6. Comment by overnigh
    September 4, 2009 @ 10:58 am

    as long as you are not draining the tank there is no reason to shut off the gas or mess with the pilot.
    reason being, as long as the tank is full the water in the tank will absorb the heat.
    turn off the water supply line to the tank, and then open the faucet you need to fix, let the pressure bleed then make your repair.

  7. Comment by William B
    September 4, 2009 @ 4:30 pm

    yes turn it to pilot that will keep it from coming on
    the valve going to the heater will shut the hot side off but not to the house,
    there should be valves under the sink to shut the water off to the faucet, if not when you shut the water off and replace the faucet add valves to the faucet lines,

  8. Comment by D2
    September 4, 2009 @ 11:04 pm

    not sure but i think that valve turns the water supply to the water heater only,look under the sink in question you should have shut off valves for that faucet,this will let you work on that one w/o disturbing the rest of the house

  9. Comment by dvdacmn
    September 5, 2009 @ 3:08 am

    the red valve is cold water supply to w/h only it does not cut off water to house that will cut off cold water to w/h only call the city they will turn it off for you to make repairs put w/h on vacation not pilot

  10. Comment by tholeede
    September 5, 2009 @ 4:30 am

    the only reason to turn off the water heater would be to drain it or if it got drained out through a leak.as long as there is water in it you don’t have to turn it off.

  11. Comment by sensible
    September 5, 2009 @ 8:09 am

    Look under the sink for water shut-off valves that control the sink water only. The valves at the water heater will not shut off all water in the house.

  12. Comment by luka
    September 5, 2009 @ 1:14 pm

    yes anytime that you turn of the water to a house to do plumbing work the hot water heater should be turned off.

  13. Comment by Mr Fixit
    September 5, 2009 @ 5:54 pm

    No, if you are draining electric you need to cut power

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