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rvCharlie · 11-23-15, 08:41 PM

I've never tried it for a PEX application, but electrical workers have several solutions for permanent protection of buried electrical joints. There's liquid that's painted on, but I have no idea about whether it will adhere to PEX. There are also tapes that seal to typical insulation used on direct burial cable.

This
http://www.permatex.com/products-2/p...ne-tape-detail
might be an option to apply over whatever connector/crimp is used for the splice. The tape would only serve to keep ground water away from the outside of the joint. (There are lots of other brands; I just picked this link because Permatex has a good reputation for their other products, in my experience.)

I even wonder if a pvc compression splice would fit over the crimp rings of a standard PEX splice. Almost 20 years ago, I trenched through a 1/2" plastic (polyethylene) medium pressure natural gas line (that fed my gas meter). The service guy for the tiny community gas company showed up (without any tools or supplies) and asked if I had a plastic PVC splice. I did; he installed it; it's still in the ground, about 20 feet from my gas meter.

Last, those direct burial polyethylene natural gas lines have their own connectors, too. Link to one source:
https://www.gastite.com/us/products/...nd/couplings/#

FWIW....

Charlie

edit: I'd probably still bring the splices to somewhere near the surface, but I have little risk of freezing where I live. Perhaps a 90 degree splice would make the rise & fall easier.

11-23-15, 08:41 PM	#1796
rvCharlie Lurking Renovator Join Date: Jul 2013 Location: central MS Posts: 23 Thanks: 2 Thanked 3 Times in 3 Posts	I've never tried it for a PEX application, but electrical workers have several solutions for permanent protection of buried electrical joints. There's liquid that's painted on, but I have no idea about whether it will adhere to PEX. There are also tapes that seal to typical insulation used on direct burial cable. This http://www.permatex.com/products-2/p...ne-tape-detail might be an option to apply over whatever connector/crimp is used for the splice. The tape would only serve to keep ground water away from the outside of the joint. (There are lots of other brands; I just picked this link because Permatex has a good reputation for their other products, in my experience.) I even wonder if a pvc compression splice would fit over the crimp rings of a standard PEX splice. Almost 20 years ago, I trenched through a 1/2" plastic (polyethylene) medium pressure natural gas line (that fed my gas meter). The service guy for the tiny community gas company showed up (without any tools or supplies) and asked if I had a plastic PVC splice. I did; he installed it; it's still in the ground, about 20 feet from my gas meter. Last, those direct burial polyethylene natural gas lines have their own connectors, too. Link to one source: https://www.gastite.com/us/products/...nd/couplings/# FWIW.... Charlie edit: I'd probably still bring the splices to somewhere near the surface, but I have little risk of freezing where I live. Perhaps a 90 degree splice would make the rise & fall easier.