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Old 07-21-2012, 09:24 PM   #1
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question about painting pex pipes


I do not want to do a drop in ceiling due to short ceiling height so I am strongly considering an "industrial" look and hiring a painter to spray the ceiling black...Is there an issue if we paint the water lines which are a plastic pex type product. We live in Alabama so the basement stays fairly constant in terms oftemperature (no extreme expansion and contraction) the paint is called "dry fall". Just wasnt sure if it could adversely affect the plastic pipes.


Last edited by mikey1999; 07-21-2012 at 09:27 PM.
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Old 07-22-2012, 03:44 AM   #2
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question about painting pex pipes


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Originally Posted by mikey1999 View Post
Is there an issue if we paint the water lines which are a plastic pex type product. We live in Alabama so the basement stays fairly constant in terms oftemperature (no extreme expansion and contraction)...
1. It's the water in the lines that's the issue. Your hot water lines will vary from ambient temperature when not in use, to about 120 degrees when in use. PEX expands and contracts 10 times more than copper. I don't think any paint will work.

2. PEX must not be exposed to sunlight, directly or indirectly since it will deteriorate when exposed to UV. Paint will have to be very opaque with many, many coats to block all light.

3. Be careful what touches PEX. The manufacturers warn against that to prevent premature deterioration of PEX. I remember seeing a list of some items while I was researching PEX but I don't have the list now.

You will probably have to build a soffit along the ceiling to enclose the PEX. If the run is long, expansion loops (like a roller coaster 360 loop) should be installed every 50 feet. If run in a small soffit box along the ceiling and the run is less than 50 feet, ample room at both ends must be provided to absorb the expansion and contraction of the tubing.

HRG


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Old 07-22-2012, 12:06 PM   #3
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question about painting pex pipes


I would contact the mfg of the pex and ask them.
Some googling showed a fair number of comments not to paint it but nothing seemed too fact-based.
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Old 07-22-2012, 12:59 PM   #4
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question about painting pex pipes


I recall most manufacturers stating that PEX shouldn't come into contact with petroleum based products. Uponor explicitly states not to use oil based paints:
Quote:
Originally Posted by Uponor PEX Installation Manual, page 17
- Do not use petroleum or solvent-based paints on Uponor PEX
.

Installation Manual: http://www.uponor-usa.com/~/media/Fi...spx?sc_lang=en

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Old 07-22-2012, 01:29 PM   #5
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question about painting pex pipes


I have used Krylon Fusion spray paint to protect PEX used for outside showers on the beach front without a problem.

Krylon Fusion is made from plastic to handle the expansion and contraction.
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Old 07-22-2012, 02:28 PM   #6
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Another consideration regarding running exposed PEX along the ceiling. PEX will droop between the supports and the droop will vary depending on the water temperature. Even if you paint the PEX, are you willing to put up with drooping tubing along the ceiling?

All considered, I would run copper lines along the ceiling and paint them.

HRG

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