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Old 12-15-2008, 07:37 PM   #1
TTFishon
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Question Do I leave both hot and cold water on

I know I need to leave our kitchen water on tonight. What I don't know is do I need to have the hot water or the cold water on or both?

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Old 12-15-2008, 07:44 PM   #2
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Default Re: Do I leave both hot and cold water on

Cold is fine. All you want to accomplish is water running through the mainline pipes.
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Old 12-15-2008, 07:51 PM   #3
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Default Re: Do I leave both hot and cold water on

Both. Open the cabinets and leave a fan on low pointed into the cabinet.
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Old 12-15-2008, 07:52 PM   #4
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Default Re: Do I leave both hot and cold water on

It depends on a lot of things like the type of pipe, the distance pipe runs and whether or not the plumbing are in a outside wall. There are a lot more factors but when in doubt play it safe.

The other thing you can do is open the cupboard door under the sink, let the heat in.

Just keep your eye on it. I once saw a mud room that wasn't heated. They let the faucet drip but the pee trap froze and the sink filled up.

When in doubt play it safe, you won't use much water.

Keep your eye on stuff like hose bibs when it warms up. They may not leak until the ice melts.
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Old 12-15-2008, 07:52 PM   #5
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Default Re: Do I leave both hot and cold water on

Both.
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Old 12-15-2008, 07:53 PM   #6
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Default Re: Do I leave both hot and cold water on

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Originally Posted by huntercgr View Post
Cold is fine. All you want to accomplish is water running through the mainline pipes.

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Old 12-15-2008, 07:53 PM   #7
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Default Re: Do I leave both hot and cold water on

I do both. Just at a steady drip, not a stream. Leave the cabinet doors open like has already been suggested.
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Old 12-15-2008, 07:54 PM   #8
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Default Re: Do I leave both hot and cold water on

Last night I left my cold water running in the kitchen sink. When I got up this morning, the hot water froze up! Got it unfroze. So tonight will let both run on a trickle.
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Old 12-15-2008, 07:56 PM   #9
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Default Re: Do I leave both hot and cold water on

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Originally Posted by huntercgr View Post
Cold is fine. All you want to accomplish is water running through the mainline pipes.

It needs to be both. Hot and cold pipes are separate from each other. Either can cool and feeze when not running.
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Old 12-15-2008, 08:03 PM   #10
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Default Re: Do I leave both hot and cold water on

Where the heck are you running your hot water pipes for them to freeze?
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Old 12-15-2008, 08:04 PM   #11
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Default Re: Do I leave both hot and cold water on

hot water freezes quicker. Take a small amount of hot water in a cup outside tonight and toss the water into the air and see what it does.
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Old 12-15-2008, 08:08 PM   #12
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Default Re: Do I leave both hot and cold water on

I suppose you might have to run both depending on the layout of your pipes. Most hot water pipes should at least be well under your crawl space, which should be warm enough.

But I guess it's possible some pipes aren't installed with cold weather in mind.
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Old 12-15-2008, 08:12 PM   #13
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Default Re: Do I leave both hot and cold water on

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hot water freezes quicker. Take a small amount of hot water in a cup outside tonight and toss the water into the air and see what it does.
That may be true, but it is not hot in the pipes but only in the hot water tank.(Like it takes a few moments to get hot water to the faucet). Without the water running through the pipe, it will freeze up just like the cold water line. Since it is seperate from the cold line. It is always the worse when they come up through the outside/exterior walls. Esp. the North side of the house.
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Old 12-15-2008, 08:15 PM   #14
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Default Re: Do I leave both hot and cold water on

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Originally Posted by Jsail View Post
Just keep your eye on it. I once saw a mud room that wasn't heated. They let the faucet drip but the pee trap froze and the sink filled up.
were you in my mudroom last night??????

exact thing that happened last night. luckily my dryer vent can be aimed at the external drain pipe and I hooked up up a heat gun on low for about five minutes...sink drained and i wont be leaving the drip on.
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Old 12-15-2008, 08:17 PM   #15
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Default Re: Do I leave both hot and cold water on

The simple fact is, each faucet has two pipes running to it. A hot and a cold. Each runs approximately the same distance to the same location.

The "hot water pipe" will be just as cold as the cold water pipe, unless it is actively running.

(or unless you have a recurculation pump in your home, and most people don't.)

As of now, I am not willing to take my plumbing truck out of my driveway for insurance/safety reasons. I've turned down a couple "frozen pipe" calls today.

I'd recommend y'all keep a drip on tonight.
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Old 12-15-2008, 08:36 PM   #16
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Default Re: Do I leave both hot and cold water on

Sounds like I should have them both running. My pipes are on the outside of the house, but they have a little structure built around them. They froze up during our first winter here, but they weren't insulated. They're insulated now though. Thanks for the help.
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Old 12-15-2008, 08:48 PM   #17
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Default Re: Do I leave both hot and cold water on

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Originally Posted by TTFishon View Post
Sounds like I should have them both running. My pipes are on the outside of the house, but they have a little structure built around them. They froze up during our first winter here, but they weren't insulated. They're insulated now though. Thanks for the help.
Don't let the insulation fool you. Insulation only retains heat that is there it does not produce heat. After a couple days of this low 20s that pipe insulation isn't any warmer than the air around it.
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Old 12-15-2008, 09:19 PM   #18
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Default Re: Do I leave both hot and cold water on

Should it be left on just to cycle the well every so often?
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