Hi, I'm adding two bathrooms to a 3-story house. I'm having difficulty finding a local company who can design & install the drain lines behind the wall. The ones I found on Yelp are almost only doing the service work fixing leaks and connecting of small fixtures.
Plumbing plays such an important role in the remodeling process. There are so many Qs need to be answered. How many stacks do I have (main line, # of branch lines)? What's the load on each stack? Can I add the new load to an existing drain stack, or do I need to branch off a new stack? How to lay the pipes to keep minimum disruption/drilling to studs & floor joists? Without seeing what's behind the wall and under the basement slab, how do I know the answers of those Qs above?
Is there such a designer role in a plumbing company that homeowners can consult with?
My two new bathrooms will contribute 15 DFUs total, one will bring in 5.5 DFUs (1 lavatory, 1 toilet, 1 shower), the other 9.5 DFUs (plus a standalone tub). The nearest stack has a current load of 22 DFUs, and it is ~38' away. The new bathroom floor is 1' elevated. The 38' distance will allow 9 1/2" drop (based on 1/4" per foot slope rate). Because the toilet flange and shower drain trap also take up space, I'm not sure if 1' difference will be enough. Can I do 1/8" slope rate if the pipe size is 3" or 4"? My water meter size is 1", street main has 144 psi, the most remote fixture is 109.5' away, highest fixture is 12.65' above water meter.
Can I connect them to this existing stack? A new branch stack is impossible to implement due to hydronic radiant floor. Could you please share what you think?
Thanks a lot!
Lily
Plumbing plays such an important role in the remodeling process. There are so many Qs need to be answered. How many stacks do I have (main line, # of branch lines)? What's the load on each stack? Can I add the new load to an existing drain stack, or do I need to branch off a new stack? How to lay the pipes to keep minimum disruption/drilling to studs & floor joists? Without seeing what's behind the wall and under the basement slab, how do I know the answers of those Qs above?
Is there such a designer role in a plumbing company that homeowners can consult with?
My two new bathrooms will contribute 15 DFUs total, one will bring in 5.5 DFUs (1 lavatory, 1 toilet, 1 shower), the other 9.5 DFUs (plus a standalone tub). The nearest stack has a current load of 22 DFUs, and it is ~38' away. The new bathroom floor is 1' elevated. The 38' distance will allow 9 1/2" drop (based on 1/4" per foot slope rate). Because the toilet flange and shower drain trap also take up space, I'm not sure if 1' difference will be enough. Can I do 1/8" slope rate if the pipe size is 3" or 4"? My water meter size is 1", street main has 144 psi, the most remote fixture is 109.5' away, highest fixture is 12.65' above water meter.
Can I connect them to this existing stack? A new branch stack is impossible to implement due to hydronic radiant floor. Could you please share what you think?
Thanks a lot!
Lily
