PAP fittings

Steve Ebels_3

I'm going to ditto Hot Rod on the FostaPex from Viega. We use a bunch of it and have been badgering the rep and people at Viega to get with the program and get it on the market in 1 1/4" and 1 1/2". At that point I'd just about ditch the torch for residential heating. We never have any issues with noise, expansion or leaks. Great product.

Here's a couple links with some specs and info.

http://www.viega-na.com/downloads/pureflow-fostaPexTechData.pdf

http://www.viega-na.com/downloads/pureflow-fostaPexSellSheet0407.pdf

Jeff C

Never worked with PAP , so I'm wondering if standard pex fittings and clinch rings are compatable.. Or, does it vary from brand to brand . I dont want to have to use compression fittings or buy a new tool to use pex al pex. This leads to another question: Do I even need to bother using pap to pipe cast iron radiators? I was under the impression that it was better for higher temps.

Mike Kraft_2

Uponor.......

is the PAP i use.Have for some time now.You heard right,it does not expand like pex.Similar to CU.It has memory and is nice to work with.I use it for iron,HWBB,panel rads,boiler headers/distribution and DHW piind(HX side).I have a press tool and use the MLC fitting (formally multi-cor).As always follow Mans fitting/install instructions.Transitions to all types of pipe are there.And you get to buy more tools.......how cool is that.

cheese

Unknown

PAP pipes are not quite as interchangable as PEX pipes. PEX fittings are not generally compatible and generally I would recommend matching fittings and pipe MFG for PAP, though there are some cross combinations that work.

PAP expands at one tenth the rate of regular pex. that can be of benefit in most systems running at anything above ultra-low radiant temps, but it's not necessarily *required*. A nice way to stay out of trouble though.

Jeff Lawrence_25

Cheese?

The big Cheese?

Welcome back.

Jeff

Tony_23

PAP vs PEX

You've seen PEX installed at 70F after it's had 180F water run through it, right ? PAP doesn't do that. Even if you use compression fittings, it's a better job.

Personnally, I use Uponor/Wirsbo MultiPress fittings. Hand press came 1st for 1/2 and 5/8", Rems corded for 3/4 & 1".
We ran 60' out and back from an Ultra to an Amtrol WH-60 with 1" MC, 25' of it crawlspace, and had it running in 2 hours/20 minutes. Copper would've been 1-1/4 and ALL day because of an 8' limit on pipe length we could get into the basement.

hot_rod

Truth be know

quite a bit of the PAP on the market is made in the exact same factory. Different colors

In theory if the tube and the fitting have the same SDR and listings they should cross from brand to brand.

The manufacturers, of course, prefer to see you use their labeled fitting. Although again many fittings come from the same plant.

I'm doing a Dianorm panel rad job with Oventrop fittings. They claim to be suitable with any brand of tube with the correct OD. Or any brand copper tube for that matter.

Check into the Viega fostaPex. Not exactly a true PAP. It is a standard pex dimension tube with an additional aluminum wrap around it. So you get a full pex inner with a tough outer jacket. Strip the aluminum outer layer to expose a basic pex. They have a great stainless crimp ring. I often use a regular copper crimp ring for test manifolds and temporary connections. Less $$ and they go into my copper recycle bucket when cut off.

hot rod

Plumdog_2

A comparison chart

would be nice. Someone that loves legwork and research should assemble a chart showing which tubing is compatible with which fittings and tools and rings. As soon as you get comfortable with one brand your supply house drops it or it gets pulled from the market or the name changes or what have you.

ralman

I had been looking at his awhile back.

This web link has a chart of compatibility if you scroll down the page. I can't vouch for the information on the site.
http://www.pexinfo.com/#fittings

Plumdog_2

\"Voila\"

Gracias! Now I can get back to work and stop pulling out the hair!

Weezbo

i once saw that very chart...

it was on a site from the United Kingdom.

it shows quite a variety of pex connections basically over 258 different connections and assemblies from all four corners of the world *~/:)