Do I Need To Protect PEX From Concrete Mix? - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 11-10-2012, 10:54 PM   #1
Join Date: Oct 2011
Location: US
Posts: 48
Rewards Points: 25

Do I need to protect PEX from concrete mix?

I'm finishing a basement wall with mortar mix, and wonder if I can have the mortar mix touch the pex piping, or if I need to ensure that I don't spill any on it or directly get in contact with it. Should I wrap it in plastic and leave a small space between the pipe (that comes out of the wall) and the concrete wall finish? Sorry if I sound stupid here

Also, if I wash down the wall with TSP (Trisodium phosphate, the real stuff), is this dangerous to PEX piping?

Thanks for any advice


TomU is offline   Reply With Quote
Old 11-10-2012, 11:44 PM   #2
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,920
Rewards Points: 806

Any pipe that passes through concrete should be sleeved or wrapped.
As for TSP, I can't say for sure but I'd keep it away just to be safe


When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is offline   Reply With Quote
Old 11-11-2012, 07:16 AM   #3
Master General ReEngineer
Bondo's Avatar
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 6,610
Rewards Points: 1,626

Ayuh,... Pex is directly bedded into concrete in radiant heating systems,...

Concrete has No effects on Pex tubing... That's Why it's used in radiant systems...
Bondo is offline   Reply With Quote
Old 11-11-2012, 08:30 AM   #4
Civil Engineer
Join Date: Mar 2009
Location: Boston
Posts: 5,637
Rewards Points: 4,854

PEX stands for cross linked polyethylene, a material which is has little reaction to most chemicals. Certainly if you spill some TSP on the PEX, you should wipe it off with a damp sponge, but I would no worry about it. As for sleeving through concrete, it is not the reaction of the concrete with the PEX that is an issue, more if the concrete shifts after construction it could cut the PEX, since PEX is soft. So it might be a worthwhile plan to install an oversize sacrificial sleeve of metal or plastic to run the PEX through.
Daniel Holzman is offline   Reply With Quote
The Following User Says Thank You to Daniel Holzman For This Useful Post:
TheEplumber (11-11-2012)
Old 11-11-2012, 09:22 AM   #5
Join Date: Oct 2011
Location: US
Posts: 48
Rewards Points: 25

Thanks, I'm just paranoid because the pipe coming out of the wall is before the main shutoff valve, so if it fails I can't even shut off the water myself I guess I'll wrap it, just in case, and leave a small gap between the wall finish and the pipe.
TomU is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
How To Keep Your Concrete Mixer Driver Happy Mort How To Guides 38 02-12-2014 06:25 PM
Concrete and Brick Repairs spidercharm Building & Construction 6 08-26-2012 04:15 PM
garden shed on existing concrete pad hartkem Building & Construction 6 10-27-2011 08:46 PM
Bamboo on modified concrete pad jhanson Flooring 0 10-08-2011 11:58 AM
Repairing concrete slab in shower JohnRoss Building & Construction 0 08-08-2011 01:20 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1