Pex A - extra run for future remodel?

[eyeball]

I had a slab leak and am repiping my home tomorrow. I decided on Pex A. Good or bad, that decision is in the rear view mirror.

The pex will begin in the rear wall of the home, travel up the interior of the wall, across the ceiling and drop down to the 1st floor fixtures an up to 2nd floor fixtures.

While the ceiling is opened, I have the opportunity to run the hot and cold lines to a future upstairs laundry room. Unfortunately, since the laundry room is not yet there, I have no wall stub the pex out of the wall.

My current plan is to have the lines run with enough slack to eventually reach the future laundry room but just leave them lying in the ceiling connected, capped and unused.

Realistically, it could be 1-3 years before we do the remodel to include the new laundry.

My question is “Will I have any problems with the water sitting in these 15’ long runs of Pex with no way out?” I have city treated water but just wonder if it will stagnate and cause issues with the rest of the system.

Any thoughts are appreciated.

 

[adsinnott1]

Put a valve on them where your T off of you line. Just leave the valves closed until you are ready to use them.

 

[rlitman]

Put a valve on them where your T off of you line. Just leave the valves closed until you are ready to use them.

And blow out any stagnant water when you finally do the install.

 

[eyeball]

I thought a valve would be useful but it will be tee’ing off the line in the ceiling and the valve would be buried.

 

[firebirdparts]

Then don't worry about it. Water is just water and mud and chlorine and all that. It'll be fine. Brown, but so what.

 

[RAYJAY]

can you put a panel where you can get at the valves, say a closet ?

 

[hilld]

Maybe you should plumb your house with a manifold instead of T's. You could just keep the ones off that are not used.

Check out this ebay listing: https://www.ebay.com/itm/142354801585

 

[The Cobbler]

I wouldn't be concerned .

 

[allinon72]

Don’t overthink it - cap the lines and be done with it.

 

[Glemon]

If it flushes water as it runs through the other pipes it won't stagnate, if it doesn't mix or flush with the water it may stagnate, but it isn't mixing with other water. My optimistic, unscientific, assessment.

 

[Bert_]

Plenty of houses have a sink or hose bib/ect in the basement that never gets used. Never heard of a problem with it and I doubt anyone worries about it.

 

[Git]

Well, since you have everything opened - wouldn't 'best case' be to run a new line back to where you have access to where you 'T'd in, or better yet, back to a manifold. That way you avoid the potential of having a problem/leak in your ceiling?

 

[Aaron_W]

I thought a valve would be useful but it will be tee’ing off the line in the ceiling and the valve would be buried.

Can you put the valves somewhere useful? It will make your life easier when you do the install if you don't have to shut the water off, except in those lines.

When we put in Pex we set it up where we can shut off every room individually, but our plumbing is basement based, sounds like your is in the attic.

 

[RAYJAY]

Maybe you should plumb your house with a manifold instead of T's. You could just keep the ones off that are not used.

Check out this ebay listing: https://www.ebay.com/itm/142354801585

alway forget that with pex you do home runs to a manifold.

 

[allinon72]

alway forget that with pex you do home runs to a manifold.

Actually in most cases it still makes more sense to do a trunk and branch system rather than home runs from a manifold.

I have several lines capped off in my unfinished basement for future use and I don’t expect any issues.

 

[flat350]

Don't know if you're having inspections done but some codes limit the length of dead ends on water piping and waste lines.

 

[yeldogt]

alway forget that with pex you do home runs to a manifold.

I was going to do a home run system w/ my new project -- unfortunately, I did not have the room in the small mechanical room for the manifold. The lines really add up ...

As mentioned. In most cases it is still a branch system with PEX. PEX use is all about speed and lower cost. My builder provided a tidbit ---- he is very picky with his subs and only allows some crews within a given company. The guys that were doing my plumbing were very skilled ... all around 50. My builder had them do copper. They train the better new guys on copper work .... but -- it's moving to PEX for a huge chunk of the jobs.