Need a sanity check on a proposed plumbing layout for my house. I am fixing a basement bathroom (already installed the ejector pit and under slab drains) that used to drain out to the tank but had to nix that drain line for a French drain system (part of my basement saga.)
I am also turning two small bathrooms upstairs (a half-bath and a full bath that back up to each other) into one full bathroom with a little elbow room.
See above picture for my layout design. The drain for the ejector and tub concern me so I need some opinions.
First, the wye on the main stack that catches the 3" drain from the left. I know that can cause siphoning in a trap upstream, but with the dry vent coming in the top of the 1/4 bend low heel on top will that alleviate that concern?
Second, would it be best to ditch the vertical 1/4 bend low heel and tie the dry vent into another wye after the bathtub? It would go EJECTOR->BATHTUB->VENT then to a 90 down to the wye in the stack?
I am leaning towards option 2. That way the dry vent would be after the tub to break any siphoning if it were to occur. The total distance from where the tub trap is and the main stack is about 5-6'. The 2" street 45 off the wye on that line will basically immediately catch that trap.
Thank you for any advice or critiques in my plan. I am still 4-6 months away from doing this, maybe longer. This will replace ALL of the plumbing in the house.
I am also turning two small bathrooms upstairs (a half-bath and a full bath that back up to each other) into one full bathroom with a little elbow room.
See above picture for my layout design. The drain for the ejector and tub concern me so I need some opinions.
First, the wye on the main stack that catches the 3" drain from the left. I know that can cause siphoning in a trap upstream, but with the dry vent coming in the top of the 1/4 bend low heel on top will that alleviate that concern?
Second, would it be best to ditch the vertical 1/4 bend low heel and tie the dry vent into another wye after the bathtub? It would go EJECTOR->BATHTUB->VENT then to a 90 down to the wye in the stack?
I am leaning towards option 2. That way the dry vent would be after the tub to break any siphoning if it were to occur. The total distance from where the tub trap is and the main stack is about 5-6'. The 2" street 45 off the wye on that line will basically immediately catch that trap.
Thank you for any advice or critiques in my plan. I am still 4-6 months away from doing this, maybe longer. This will replace ALL of the plumbing in the house.
