Hi all, I just built a garage at the rear of my property and want to run water and drain plumbing for a slop sink. I have a few questions and for reference I'm in VA and on city water and sewer:
I'll be trenching my supply and drain line to my basement about 70'. The 3" DWV pipe will go through the foundation wall in the corner and run along a wall with a "chimney", wrapping around that to tie into my house's main drain/vent stack which is 4".
First Q: Where the drain (and water line) penetrate the brick foundation wall, do I need to sleeve those penetrations the way you do for a slab (pipe thru pipe 2 sizes larger)? Or can that be sealed with something like plumber's putty or mortar?
Second Q: Is there a code requirement for height of a connection to a house's stack from the floor? I'll be dropping 1/8" per foot in my trench since I'm using 3" pipe but it's still probably going to come in between 10-18" from the basement slab where it meets the stack.
In the basement, I'll have to cut the slab and bring the pipes under the footer here, they'll be sleeved in larger pipes. From my drain riser, I'll use a tee with a clean-out plug, and just above that, a sanitary tee going to 1.5" PVC for my sink drain.
Third Q: Can I use an AAV (air-admittance valve) on the sink drain just after the P-trap or do I need to make a vent from my 3" riser out the roof? I'd like to avoid that if I can, and I don't plan on adding more plumbing fixtures in the future. If I had to I'd have a 2" PVC vent come off the drain riser with a wye fitting or reducer.
Fourth Q: Any code issues with running water supply in the same trench as the drain? The plan is side by side min. 24" below grade (6" below frost line). Electrical conduit will be above it at min. 18" below grade, and fiber/Cat6 and detectable tape above that.
Fifth Q: Any required clearances between PVC DWV and water heaters? My natural gas heater is currently against the wall I'd need to run my drain in the basement, so I'm planning on moving it a few inches off the wall so I can run the drain behind it.
I've attached a pencil sketch to help illustrate my plan. I can provide pictures if it helps.
P.S. I've heard of people tying their garage drains to their house's sewer line out in the yard, but the house is old and has a terracotta main line located god knows where or how deep. At a future point in time I'd like to pipe-burst it anyways with an HDPE line.
Thanks in advance for any help!!
I'll be trenching my supply and drain line to my basement about 70'. The 3" DWV pipe will go through the foundation wall in the corner and run along a wall with a "chimney", wrapping around that to tie into my house's main drain/vent stack which is 4".
First Q: Where the drain (and water line) penetrate the brick foundation wall, do I need to sleeve those penetrations the way you do for a slab (pipe thru pipe 2 sizes larger)? Or can that be sealed with something like plumber's putty or mortar?
Second Q: Is there a code requirement for height of a connection to a house's stack from the floor? I'll be dropping 1/8" per foot in my trench since I'm using 3" pipe but it's still probably going to come in between 10-18" from the basement slab where it meets the stack.
In the basement, I'll have to cut the slab and bring the pipes under the footer here, they'll be sleeved in larger pipes. From my drain riser, I'll use a tee with a clean-out plug, and just above that, a sanitary tee going to 1.5" PVC for my sink drain.
Third Q: Can I use an AAV (air-admittance valve) on the sink drain just after the P-trap or do I need to make a vent from my 3" riser out the roof? I'd like to avoid that if I can, and I don't plan on adding more plumbing fixtures in the future. If I had to I'd have a 2" PVC vent come off the drain riser with a wye fitting or reducer.
Fourth Q: Any code issues with running water supply in the same trench as the drain? The plan is side by side min. 24" below grade (6" below frost line). Electrical conduit will be above it at min. 18" below grade, and fiber/Cat6 and detectable tape above that.
Fifth Q: Any required clearances between PVC DWV and water heaters? My natural gas heater is currently against the wall I'd need to run my drain in the basement, so I'm planning on moving it a few inches off the wall so I can run the drain behind it.
I've attached a pencil sketch to help illustrate my plan. I can provide pictures if it helps.
P.S. I've heard of people tying their garage drains to their house's sewer line out in the yard, but the house is old and has a terracotta main line located god knows where or how deep. At a future point in time I'd like to pipe-burst it anyways with an HDPE line.
Thanks in advance for any help!!
