new water lines

jack z

I have to run new hot and cold water lines to a bathroom. The house has foam insulation(Icynene) and there is no easy way to gain access. Rigid copper won't work due to the amount of turns needed to get through the foam. The only way I can see to run these lines is to use pex or something like Heatways rubber hose. I would also like to use a pex copper connection that doesn't need a special crimping tool if something like this exists. Anybody have any ideas or suggestions. Thanks

Joe_51

Most manufactures make some sort of comression style fittings that may have threads on the other side to connect to copper fittings. Other will come along and add to this thread.

Joe_51

Wirsbo

Wirsbo Part number A4322050 is a fitting that compression fits 1/2 pex to 1/2NPT copper other sizes are avalable. Hope this helps. Someone locally or at this site may sell you the amount of pex you need for this retrofit.

hr

You could

use PAP tube for this application, it lies nice and flat. It would stay in those wall spaces better than curley pex, I feel.

Or buy pex in straight lengths.

They make compression couplings and fittings for all pex tube. Go with the tube manufactures fitting.

You can also buy compression fittings for regular copper tube sizes (cts).

Generally 1/2" copper pipe is called 5/8 (od size)when buying compression fittings. It may take two separate fittings to get from pex to copper with compression on both ends. Maybe not, check with the pex tube manufactures.

Not sure any of the rubber or EPDM tubes are rated for potable water applications, by the way. Sure would be some smelly water coming out the end

hot rod

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Bill Verdecchia

Many manufacturers have compression style fittings that would work for you. The most important thing is to make sure that you use a compression fitting that is designed for plumbing. Some fittings are designed for radiant and do not have the NSF listing. When making parts for plumbing, the pressure requirements are higher as well as the amount of extracted toxic components from the fittings (Because you could be drinking the water).

If you are looking for a simple system, Zurn has a fitting system called Qicktite. The system uses the outer diameter only to make the connection. This allows the fittings to be used with PEX,Copper,CPVC, and even Polybutalene. I would suggest cutting a small section of copper out and installing the appropriate Qicktite Tee. Then install the pex on the branch of the tee. Very clean and simple with only the need for a wrench. The Qicktite Tee also has no wetted metal parts to corrode and no o-rings to degrade.

Just one way you could go.


Bill