Black plastic water lines?

[Groove]

I've been fixing leaks in the RV this week and all but one have been repaired. Under my kitchen sink there's a 5" split right down the middle of my cold water line and I'm having a hard time locating the exact same tubing. What did Winnebago use in 1988? Pex tubing is a slightly different diameter.

The black line in this photo is what's throughout my RV. What is it?

[Groove]

Ok, I just found out that it's Polybutylene tubing and it's no longer being made. The link below shows how to adapt modern PEX tubing to the old Polybutylene for repairs. Good to know!

http://www.mobilehomerepair.com/article_waterlines1.html

[M & J]

That was easy. Thanks for posting the solution.

[DonD]

Have PB in my stick house..it's crap.

[ClydesdaleKevin]

Flair-It fittings will work to splice new line into the old black AND grey tubing.  Those things are amazing, and are all I use in our rig anymore.

KEv

[Froggy1936]

FYI My 77 Mini Winnie has a silvery grey colored line (plastic of some type) Both hot and cold ,I have never had any problems with it in the 16 yrs i have had this rig     Frank

[Oz]

Interesting, Frank.  That's what mine had in too from the PO.  All the main, larger lines.  From them they went to PEX to the faucets and shower.

[Groove]

Thanks Kevin! I have a couple of those fittings already in place, but I didn't know that they could adapt pex to poly.

[tiinytina]

As we've had leaks we've been switching to pex lines.  bought a crimper gadget etc.... only issue we've had is the old butyl fittings have leaks and a shower line rubbed against a support for 24 yrs and finally rubbed through.....  and yes on flairs.
tina

[Oz]

I had problems with that too.  Then Glenn fixed them right for me.  Perfect after that.