Anyone on this board have any experiences to share re-plumbing a house with PEX?

you mean like rip sheetrock out and re-plumb? why? what is kitec?

I don't have any personal experience with Kitec but I do have a bit with ripping out old plumbing lines. I would avoid tearing up an inhabited house if at all possible.

I think exterior corrosion is evident on those problem fittings if serious corrosion is occurring. Maybe inspect the fittings and even drill some inspection holes under sinks, ect and use a borescope to look inside walls. But if the ones you can see don't look to be a problem then its more likely the ones you can't see are ok as well.

Its probable that the supply water mineral makeup has an effect on how fast corrosion occurs. So maybe you have a water condition that isn't as bad as others that have failed. If you live in a neighborhood that was constructed around the same time you might ask around, nextdoor, ect if anyone else has the same plumbing.

Investing in one of those smart wifi watermain shutoffs would be nice peace of mind. I don't have any experience with them but from what I've read they are pretty nice and do a decent job of detecting leaks.


but man, screw drywall patching and painting in a home you're living in.

Last year I replumbed all the main trunks running through my attic. The old pex was 3/4", and was clogged from iron from our well. I upsized to 1" pex. The original stuff was Pex A, or expansion pex. I bought a milwaukee expansion tool and it made the job a breeze.

At the time it was a little tricky to find expansion fittings, but now it seems that all Lowes and HD stock them.

I did not redo the drops going down to each fixture, I just connected the old drops to the new main trunk. I imagine all that drywall work would be a real pain.

I was able to put in some extra shut off valves and improve on some things I didn't like. The water was down to a trickle, and now it flows well.

I’m a big fan of pex
I have tons of it run exposed under my deck and in my carport and none of it burst in the last deep freeze. It froze but it didn’t break, and it thawed almost immediately

We bought our current house in 2020 just before Covid. It was built on the 90s and had polybutylene pipes which have a history of failure. Made a total replumb with Pex a condition of purchase. 3 story 4100 sq ft house, work took 7 days before we moved in. I was in and saw all the places they cut into drywall and wouldn't have known it was done once put back together. It cost $8k and that included upgraded fittings.

All in all it was quick and painless since the house was unoccupied.

I did my place in a DIY project a little over a year ago.

The biggest challenge was access. I had to tear out some walls to get it to the piping. I had a few tight spots that was a booger-bear to get to.

For the most part it went fairly easy.

I used the crimp-on style fittings. A few spots was hard to get to, so I used the quick-connect Shark bite fittings. The Shark bite fittings are a lot easier to use but the crimp-on style seems a lot more secure.

Plus the crimp-on type takes a crimping tool and a little extra effort.

A few of pointers:

If you are going to DIY, a few YouTube vids would be extremely helpful.

Save your old piping to use as a pattern, especially around the bathrooms, sinks and hot water heater(s). Some of the routing can be a little confusing if you are inexperienced with plumbing.

I insulated my piping with foam tubing using zip-ties to hold them in place. Make sure you have enough 45 degree , 90 degree elbows and t-shape ones to insulate the pipes.

I purchased my supplies from Lowes.

Re piped our raised house recently with PEX A expansion. Very easy. Get the Milwaukee expander tool, well worth the money