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Old 12-20-2009, 10:14 PM   #1
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Green water


I have noticed that the water in the tub is getting green. No smell. Is this a sign that my hot water heater is getting ready to go? Has the heating element rusted.

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Old 12-21-2009, 07:18 AM   #2
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Green water


If I recall correctly, green stains are a sign of dissolved copper(not from the plumbing). Are you on a well?? Filters can help remove those things.

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Old 12-21-2009, 08:29 AM   #3
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Green water


If your water is acidic, it could be gradually taking and dissolving copper from all the pipes it passes through i.e. corroding the pipes. Non-deluxe tank water heaters do not contain copper although their metallic innards not including the parts still covered in glass or ceramic will also be gradually dissolved.

A water softener removes copper, iron, etc. but must substitute some other metal (usually sodium since ordinary salt "fuel" for the softener is cheap). Sodium compound deposits are white (less conspicuous) and also easier to rinse off the bathtub.

If you towel off the bathtub and shower curtain after using, the surfaces will not discolor due to copper etc. compound deposits as fast. Less water left to evaporate means less deposits left behind.
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Old 12-22-2009, 06:34 AM   #4
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Green water


Get the water tested, Usually plumbing supply houses can test the water for you at no charge. They will determine what type of system you need, I have very acidic water so I use an acid neutralizer which looks like a softner without the brine tank and after the neutralizer you are gonna need a softner because the media in the neutralizer will make the water Hard. After I installed my system there was no more green at the sinks and tubs which made my wife very happy, she didn't have to scrub the tub every couple of days, and you get soft water out of the deal, If your water is acidic it will eat the inside of your copper pipes till you start sprouting pin holes everywhere. Don't wait to long.
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Old 12-28-2009, 02:47 PM   #5
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Green water


Thanks for the advice. Im not on a well and it seems like it has just started happening over the last few weeks. I'll start by getting my water tested.
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Old 02-15-2010, 08:35 PM   #6
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Green water


I just fingured out that it is only green when I run HOT water - not cold. Noticed that the toilet water and tap water are clear - hot water from the tap and into the tub is yellow/green. What the heck is that?
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Old 02-15-2010, 08:45 PM   #7
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Green water


High alkaline will do it too and around these parts is far more common
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Old 02-15-2010, 08:54 PM   #8
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Why do I only see it with hot water?

Last edited by gruntman; 02-15-2010 at 09:00 PM.
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Old 02-15-2010, 09:52 PM   #9
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Green water


Low pH acidic water can cause this. A hot water recirculation system can cause erosion corrosion of copper tubing and that will add copper to the water. Electrical grounds on copper tubing or a bad ground on a water heater can cause it too.

Yellow tint usually means iron, or it could be tannin. Iron would be from an internal rusty area in the water heater or galvanized fittings.

Hardness is made up of calcium and magnesium.
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Old 02-16-2010, 12:40 AM   #10
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Green water


Maybe your copper pipes are not correctly bonded?
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Old 02-16-2010, 06:19 AM   #11
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Green water


Get the water tested. You can pick up a PH test kit at Wal Mart I think.
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Old 07-09-2010, 04:23 PM   #12
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Green water


It was the heater - replaced it and the problem is gone.

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