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Protecting PEX from abrasion on wood tray and in blind fish run
As you can see in the pictures, these water lines on the 2nd floor are run in a retrofit manner which required creating an access door in the floor. The ceiling under is ornate plaster, so I’m sure that was the best option when they did the retrofit about 80 years ago. I am replacing these particular pipes with PEX because I’m concerned with the l ead content in the old brass lines.
As you can see in the attached photos, the current brass pipes sit on a wood tray that has been built into the floor. They are not attached to anything (no hangers/brackets) for their entire length. Furthermore, this tray runs about 12’ under a carpeted area where I do not want to pull up the carpet.
What is the best way to protect the PEX on this run?
I’m concerned about abrasion sitting on the wood tray, and in particular abrasion in the part where I can’t access it to install any sort of hangers or standoffs.
My current thoughts are to install regular hangers in the part that I can access and use some sort of a sleeve, such as pipe insulation or PVC, to protect the pex for the section where I need to snake it blind. I’m unsure if this is necessary though. Thoughts?
Homeowner from Providence, RI
Home b. 1897, one-pipe steam with a indirect gravity hot air system using Gold's pin radiators.