04:42PM | 03/25/07
Member Since: 03/24/07
2 lifetime posts
We purchased a 7 year old home and when we put water in the soaking tub in the master bath, the water turns blue. Could this be a special kind of tub? I can't find anything about it online.


04:35AM | 03/28/07
Member Since: 01/24/06
1626 lifetime posts
I once received a call from a CO-OP that a stock holder was complaining about blue water in her bathtub on the 18th floor.

After checking several apartments above and below this one I found one of the handymen install a ball ***** that was not code approved because it did not have a vacuum breaker.

Because this valve allowed back siphoning the blue chemicals used to clean a tank several floors below flowed back into the domestic water line and went up the riser to this apartment.

Once I replaced and flushed the lines end of problem


06:11PM | 03/30/07
Member Since: 04/01/05
32 lifetime posts
I am guessing that you have a low pH and using copper pipes. Is that right?

If so, you would need to neutralize the water by raising the pH by a variety of different ways depending on the pH level.

Gary Slusser

04:20AM | 03/31/07
Member Since: 02/17/04
112 lifetime posts
Blue usually means copper in the water. A water test for copper will tell if it is the cause.

If it is, there are a number of causes; low pH acidic water, high TDS, DO and CO2 content, hot water recirculation systems with excessive velocity, dissimilar metals corrosion, bacteria and electric grounds on copper tubing or a bad building ground etc..

All can lead to pinhole leaks in copper tubing.


Quality Water Associates


05:51PM | 04/01/07
Member Since: 03/24/07
2 lifetime posts
When we put the bath water into a clear glass, the water was clear. It only appears blue. This is what makes me think it's a special coating on the tub.


12:44PM | 11/09/15

Doreen! Me too and it is only the one bathtube not in the guest bathtub, did you ever figure out what it was?


06:06PM | 11/11/15
Ask the moderator she knows everything about plumbing. heating AC and roofing and electrical
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