If the two pipes run parallel to each other use the wye.
Floor sink wye to top of pipe.
A second case to consider is where a vertical pipe serves both as a drain and a vent.
The sink drain must maintain a minimum slope of 1 4 inch per foot from the stub out to the point where you tie it in.
Wyes are incorrect for this application.
It connects via a 3 length of 2 pipe a 1 5 2 adapter a 90 degree 1 5 bend and a 1 5 swivel abs adapter to the output of the hair trap.
I am looking to put a laundry box and am hearing that 42 from floor but i m also hearing that 18 to 30 from p trap as well.
2 install the fitting by cutting the main drain pipe with a hacksaw and solvent welding the fitting with plastic pipe cement.
Cross fittings crosses have four openings for pipes one inlet and three outlets or three inlets and one outlet depending on the need.
In this video we show you how to install dual kitchen sink drain plumbing pipes under kitchen sinks.
You run that 2 pipe toilet vent sloping upwards to the floor drain and put in a horizontal 2 2 2 wye for the 2 floor drain trap this seems like flat venting which is not allowed.
If you use a wye for the vertical for a trap arm when the trap is installed and if the pipe is properly pitched it puts the trap weir above the wye inlet which theoretically can cause the trap to siphon.
Installing a sanitary tee instead of wye or long sweep for drainage connection or back to back fittings sinks not directional upc 701 2 3 upc 704 1 704 2 706 0 sanitary tees may only be used on drainage piping when transitioning from horizontal 1 4 per foot to vertical.
Obviously anything higher than the utility sink but not to high that the washing machine can t pump out the water.
Sanitary wyes allow wastewater to enter a drain pipe from the side while the second part of the y aligns with the pipe to allow sewer gases to vent upward.
But they had to add a 45 degree elbow to make the horizontal p trap connection.
You can also drop the sink drain to a waste line on a lower floor.
In this picture a diyer has installed a wye to connect the p trap to the vertical drain.
The left pipe is a vent that goes through the roof and the right one is an upstairs kitchen drain.
With a wye the fluid passing through the junction would.