Pex plumbing conversion part 1

[goofy78270]

In remodeling an upstairs bathroom, I am looking to convert the existing copper pipes into pex. In doing this, I have seen numerous post about using manifolds and seperate homeruns to each fixture rather than the conventional single run using T's and L's for fixtures.

Unless anyone has strong objections to the conversion, I would like to know how I can convert the bathroom to pex and keep the homerun philosophy. If I install seperate runs to each fixture, at what point do I join to the single supply line in place, untill I move on to the next section? Or is converting to a homerun methodology something I would have to do all at once, for the entire house?

 

[Another-Plumber]

im confussed to what your saying, but pex is the way to go,,,,

 

[Cjsruger]

I am also doing the same thing right now, new bathroom and then new pex through out the house, is anyone going to tell me not to use the brand home depot sells? Because thats what im leaning toward

 

[LiQuId]

home runs...

Advantages: no joints in non accesibble locations
even pressure and flow distribution due to manifold.
Easy to fix if leaks occur ( you can valve every run off of a manifold and sut down a single fixture w/o affecting the whole residence )

Disadvantages: hot water lines must often purge the entire line to get true hot water
Manifold cost
harder to run proper rrecirculation runs ( this is debateablle due to new tech. developed )


im sure theres more but as far as me.

We run home run systems typically in Condo's
We run Branching systems typically in large houses with Recirculation.

 

[Another-Plumber]

is it ok to run a recir in pex? if so, what should i NOT do..

 

[goofy78270]

Thank everyone for their responses, but this still did not answer my question. let me try and explain it a little better.

When I replumb the bathroom, I plan on creating five runs, two hot and three cold, for the sink, shower, and toilet. as these five runs are NOT going to go all the way to the future manifold location, at this time, what is the recommendation for splicing these five lines into the two supply lines until the next remodel project takes flight?

Since this is an upstairs bathroom, the current supply lines are run from the basement to the bathroom, through a downstairs wall. Would it be best to splice the lines inside the downstairs wall itself or within the floor, before going through the header and into the downstairs wall?

 

[goofy78270]

Can you please explain what a recur is and why or when I would install one?

 

[havasu]

They are referring to a recirculating pump for your hot water.

 

[Cjsruger]

Im thinking of doing the trunk and branch system using one of these at the bathroom. fed by 3/4 and 1/2's coming off to each fixture.

http://www.homedepot.com/h_d1/N-5yc1v/R-202721980/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=sharkbite%20copper%20manifold&storeId=10051

 

[LiQuId]

AP, yeah you can run a recirc line in pex 1/2 " is perrrrfect.

To the Op. Trunk and branch works better for bigger homes, you would run the end of the 3/4 line back to the hwt and install a circulator if you wanted to run recirc on your lines.