PEX vs PVC

luvrbus · February 20, 2015, 02:07:26 PM

You body absorbs anything in the tank when you shower drinking from it just speeds the process up

Now I have this thing about drinking from anything made of plastic the VCM (vinyl chloride) is some nasty stuff. I worked at Tenneco in the 60's where they made it

Iceni John · February 20, 2015, 04:16:19 PM

Quote from: lvmci on February 20, 2015, 01:36:44 PM
hi All, I let my blue & red coils sit in the sun, relaxes them some. I have never drank from holding tanks in any RV, just wash and flush with them, started with the kids years ago, bringing bottled water to drink & cook with, tom ,lvmci...

I also had problems with the coiled PEX not wanting to go straight, so I put it inside 10' lengths of 3/4" EMT conduit and left it in the sun for a few days. It's not quite as straight as the sticks, but good enough. Of course, if you live in the eastern states, this method may not work so well now . . .

John

mung · February 20, 2015, 08:29:36 PM

I am calculating how much it would cost to bring pex coils to a place warm enough to heat them up and I live in Florida, so that is really sad.

luvrbus · February 21, 2015, 03:20:47 AM

LOL I live in AZ I tied mine off to a pickup and pulled it with my tractor left it in the heat for 4 or 5 hrs with tension on it the Pex wasn't completely straight and the Pex still tried to coil back but more manageable to work with fwiw I was using 3/4 inch the 1/2 inch was a little easier to work but not by much

bevans6 · February 21, 2015, 04:42:41 AM

Pro's seem to love the coiled PEX, they just pull it through and let it un-coil as they pull it. The joys of working new construction... It's when you are trying to fish stuff around and through existing holes that it gets hard.

Brian

belfert · February 21, 2015, 11:59:36 AM

Quote from: luvrbus on February 18, 2015, 12:22:28 PM
Sharkbite fitting compatible with cooper and Pex will only work on CPVC not the standard sch 40 white stuff fwiw ,lol the RV industry is still using the gray Poly pipe ban from housing 20 years ago

The last (and only) factory built RV I bought in 2003 had standard PEX in it. No gray poly in it.

I guess I don't understand how PEX is really that much more expensive than PVC. PVC requires more connectors typically since it isn't flexible. There are plastic elbows, tees, and so on instead of metal that are less expensive. I personally think PEX is less likely to be damaged. PVC can break when hit while PEX has give to it.

eagle19952 · February 21, 2015, 01:36:34 PM

Not trying to be a smart A-ss.... who goes around hitting water pipes ?
There aer miles and miles of PVC that has suffered zero failure for 40 years or more.

I get the I want the latest greatest neatest stuff in my coach, but there is nothing wrong with PVC. And ..... If PEX is so great, why the heck would you run it in conduit ?

luvrbus · February 21, 2015, 01:56:54 PM

Saw a 2010 Newmar that Quest gray pipe was everywhere even had the Quest manifold that is all most RV supply's sell is the Quest fitting,valves and pipe YMMD Belfert,nothing wrong with PVC,CPVC,Quest or Pex in a RV IMO Pex is just cheaper and easier

All the water pumps for RV's have the Quest fittings to tie the water pump to the lines unless that has changed in the last few months

mung · February 21, 2015, 03:40:33 PM

Well, I started my job and as I was pulling out the old mess, the CPVC line coming from the water heater was shattered down the entire length, so it failed in a big way at some point. Must have been part of the "small" leak he said needed to be fixed.

RJ · February 21, 2015, 04:40:34 PM

Quote from: mung on February 21, 2015, 03:40:33 PM
Well, I started my job and as I was pulling out the old mess, the CPVC line coming from the water heater was shattered down the entire length, so it failed in a big way at some point. Must have been part of the "small" leak he said needed to be fixed.

Sounds like the "small" leak I have on Tortoise - goes from the water fill connection on the driver's side of the coach all the way across the rear baggage bay bulkhead to the curb side. It split when I went up to my daughter's in Kelowna, BC for Christmas.

The joys of one-bedroom-condos-on-wheels, eh?

Iceni John · February 21, 2015, 05:23:21 PM

Quote from: eagle19952 on February 21, 2015, 01:36:34 PM
Not trying to be a smart A-ss.... who goes around hitting water pipes ?
There aer miles and miles of PVC that has suffered zero failure for 40 years or more.

I get the I want the latest greatest neatest stuff in my coach, but there is nothing wrong with PVC. And ..... If PEX is so great, why the heck would you run it in conduit ?

I mentioned running PEX inside EMT conduit because I have some long unsupported runs next to the frame rails - I'm not going to drill holes into frame rails every 12" for support clips, so running it inside something rigid is the best way. Plus, inside the luggage bay I don't want things in there to bang against the water, gas and air lines there, hence my protecting them from any possible damage.

John

eagle19952 · February 21, 2015, 07:34:16 PM

Quote from: mung on February 21, 2015, 03:40:33 PM
Well, I started my job and as I was pulling out the old mess, the CPVC line coming from the water heater was shattered down the entire length, so it failed in a big way at some point. Must have been part of the "small" leak he said needed to be fixed.

well that is one place (even I know) that you don't use anything but copper in the first two or three feet....same as an air compressor.

I would not use PEX or anything but copper or iron there.

mung · February 22, 2015, 05:53:53 AM

Can Pex be expanded just a bit if you have a tight fitting barb? If so what is the preferred way to do it?

sledhead · February 22, 2015, 06:23:25 AM

I can't find the one I have as it is a kitec reamer but this should work

http://www.homedepot.com/p/Klein-Tools-Conduit-Reamer-19352/100647804

dave

luvrbus · February 22, 2015, 06:30:16 AM

A battery terminal expanding tool from AutoZone for 5 bucks works for me