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Old 11-20-2009, 09:35 AM   #1
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House sitting vacant 2 years - city water

I have been warned that I should clean the water lines in a house that has been sitting so long.

I know how to do that for a well, but how do I do that for a house that has city water?

Is it important to have it professionally done?


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Old 11-20-2009, 11:22 AM   #2
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Shut the water heater off & drain it
Shut the boiler off & drain it
Open the taps & let them run
Flush the toilets, open up all sink/shower valves & let them run a few minutes
Open the outside hose lines & let water run
If there is a water softener drain that too

Once the house lines are all flushed out refill the water heater & boiler

I don't know of any way other then this....


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Old 11-20-2009, 12:06 PM   #3
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Thanks dor you reply. So the pipes need not or cannot be chlorinated?

I will do the things you suggested.

I thought I should run chlorine through the system and let it sit in the pipes overnight like you would do when you have a well. I just couldn't figure out where you would put the chlorine in the system.

Is mold growing inside pipes a concern when a house has been vacant?
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Old 11-20-2009, 01:37 PM   #4
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Determine what the plumbing lines are made of. If it is galvanized steel pipe, it is likely to clog soon after you have the water turned on. Copper and PVC do not have this problem. If you are on City water, the chlorine should be in the water. If you flush the lines and then let it sit overnight, the problem should be cleared. Be sure to remove the aerators on the end of faucet spouts before flushing to prevent them clogging.
If you have never made a mistake, you haven't done much.
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Old 11-20-2009, 03:19 PM   #5
Mold!! Let's kill it!
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Mold won't grow inside of pipes filled with water. Bacteria will. A good flush like Dave described will take care of it. I'd pull all of the aerators off of the faucets first and remove the shower head(s). Soak those items in a 10% clorox solution. Depending on the water temperature, Legionella loves stagnant water inside of pipes. Shower heads are the easiest way to blow it into the air where you can breath the crap. You don't really want to do that, so don't turn on the shower to flush the head.
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