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 Main water supply
Author: jmsealre (NY)

Can I turn off my main water supply while away from home for an extended period.? I live in a extremely cold region during the winter. I am worried about frozen pipes. If I can do this do I open faucets to drain the lines?

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 Re: Main water supply
Author: packy (MA)

it will do no harm to shut the water main off.
remember to shut off the power to your water heater if it is electric. if it is gas just turn the control knob to 'pilot'.
if you have hot water heat you need to be sure there are no leaks as the heating system water will not be replenished.
opening faucets and flushing toilets will de-pressurize the system but there will still be water setting in the pipes and traps etc.
other than that, i see no problems...

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 Re: Main water supply
Author: jmsealre (NY)

Thank you.

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 Re: Main water supply
Author: PlumberLoren (CA)

I will add that you should open the exterior hose bib located at the lowest point in your system to relieve pressure when you do this. Be sure to close the hose bib and open the highest valves in your home to bleed off any air that enters the line when you turn your water main valve back on. Others may add to this answer if I left out anything. Good luck.

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