Skip_Johnson
Active Member
Hi everyone,
Have a customer that requested the supply system be set up with a homemade manifold mainly for ease of use for future tenants.
Material list acquired was all 3/4" and 1/2" pex pipe and fittings.
Double checked with them today and they insisted that they wanted the manifold to have a 3/4" main trunk with 1/2" shut offs and home runs to each fixture through the house. The cold manifold will have 9 off-shoots and the separate hot manifold will have 7 off-shoots.
I haven't set up pex using a manifold before. All pex work I've put in I've always just ran it like a copper system out of habit and would run a large 3/4" main trunk the length of the house and shoot off of that as needed for rooms and/or individual fixtures with shut offs accessible in the basement.
I am concerned though that this 3/4" main with 1/2" home runs will not handle the average use sufficiently and be more prone to bottoming out. Is that valid or is this arrangement sufficient?
If not sufficient as-is, would it make a significant improvement to have 3/4" main body with 3/4"off-shoots to each separate room (bathrooms, kit, laundry) and then split off for each fixture from the individual 3/4" sub-trunks?
Thanks for reading!
Have a customer that requested the supply system be set up with a homemade manifold mainly for ease of use for future tenants.
Material list acquired was all 3/4" and 1/2" pex pipe and fittings.
Double checked with them today and they insisted that they wanted the manifold to have a 3/4" main trunk with 1/2" shut offs and home runs to each fixture through the house. The cold manifold will have 9 off-shoots and the separate hot manifold will have 7 off-shoots.
I haven't set up pex using a manifold before. All pex work I've put in I've always just ran it like a copper system out of habit and would run a large 3/4" main trunk the length of the house and shoot off of that as needed for rooms and/or individual fixtures with shut offs accessible in the basement.
I am concerned though that this 3/4" main with 1/2" home runs will not handle the average use sufficiently and be more prone to bottoming out. Is that valid or is this arrangement sufficient?
If not sufficient as-is, would it make a significant improvement to have 3/4" main body with 3/4"off-shoots to each separate room (bathrooms, kit, laundry) and then split off for each fixture from the individual 3/4" sub-trunks?
Thanks for reading!
Last edited:
