You have to make a tight joint between the floor drain riser assuming there is a trap beneath it and then install your new shower drain.
Shower drain into floor drain.
It would double trap the line and it would prevent the drain from doing its job which is to catch surface water in the basement and move it to the drainage.
The shower will be trapped by the floor drain and the floor drain s vented by the holding tank.
The vents can then tie back together above the flood level of the fixtures plus six inches.
A traditional shower pan requires a clamping drain which must be installed to meet the height of the liner and deck.
If the concrete is broken then it would be possible to plumb for a new floor drain and a shower drain.
A composite pan commonly has the drain slightly recessed in the floor whereas the riser must be the exact length required of that particular pan and drain combination.
The shower drain trap piping for a shower drain includes a trap like the ones you see under your sinks.
From the bottom push a rubber washer onto the drain body then push on a slip washer to cover the rubber washer.
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2 no all your drainage is already vented.
4 floor drains typically were not vented but if yours is cast iron it may have been.
Everybody s happy and you don t have to tear anything up.
When the washers are in.
You don t want to run a drain pipe directly into the trap of a floor drain.
Check the water tightness of the shower drain and connection to the sewer to eliminate leaks.
Nothing else matters other than this drain and whether it is vented properly or not.
Slide the drain in the connector it is not necessary to glue this as the connector provides sufficient sealing.
Put the drain body into the drain hole in the shower.
Then simply remove the floor drain cover and drop a piece of pvc from the ell down the throat of the floor drain trap.
First connect the linear shower drain to the drainage pipe and make sure that the drain pipe has sufficient slope.