barasingha
New Member
Great forum. Longtime reader but first post. I am not a plumber but have done some plumbing.
I have decided to replace the cast iron drains under my slab on grade house and could use some advice. All work will be done below slab, not thru floor. Instead of tying onto the old cast iron dropping below the slab, I am considering coring new holes for the new PVC to penetrate the slab for sinks/laundry. Has anyone done this? If so how did you tie into the vents? My current plan is to fill the old drain lines with grout (below slab) and connect the new PVC to the old line in the wall to tie into the existing vent. (Hope that makes sense) Suggestions? Toilets will get new plumbing to them and the tub traps will be replaced from below.
Also, currently the laundry room p-trap is under the slab. I have a place above slab to move the p-trap to but the existing line has no vent. What are your experiences with one way vent valves?
Thanks in advance,
barasingha
I have decided to replace the cast iron drains under my slab on grade house and could use some advice. All work will be done below slab, not thru floor. Instead of tying onto the old cast iron dropping below the slab, I am considering coring new holes for the new PVC to penetrate the slab for sinks/laundry. Has anyone done this? If so how did you tie into the vents? My current plan is to fill the old drain lines with grout (below slab) and connect the new PVC to the old line in the wall to tie into the existing vent. (Hope that makes sense) Suggestions? Toilets will get new plumbing to them and the tub traps will be replaced from below.
Also, currently the laundry room p-trap is under the slab. I have a place above slab to move the p-trap to but the existing line has no vent. What are your experiences with one way vent valves?
Thanks in advance,
barasingha
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