Installation may be slightly more complicated if you are alsoinstalling a garbage disposalas part of the new sink installation.
Occasionally, you may find a 2-inch kitchen drain outlet.
Extra-deep farmhouse-style apron sinks often require this kind of alteration.
The Spruce / Kevin Norris
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Measure up from the floor or base of the cabinet to the center of the trap arm.
So, the sanitary tee fitting serving as the drain outlet has been lowered (right photo).
The Spruce / Kevin Norris
Keep in mind that the drain height must leave enough room for removing the trap and cleaning it out.
Leaving the fittings loose will allow you some room for adjustment.
Before continuing to the next steps, remove the old sink andinstall the new sinkin the countertop.
The Spruce / Kevin Norris
Our installation will include a double-basin sink with a garbage disposal fitted to the right basin.
Next,install a basket straineronto the remaining sink basin.
You will need to work around these fittings as you connect the drain pipes.
The Spruce / Kevin Norris
Let the straight end of the pipe extend past the vertical tailpiece on the sink basin.
The pipe should slope downward slightly toward the tailpiece.
Now, cut the tailpiece and continuous waste pipe to length with a PVC tubing cutter or a hacksaw.
The Spruce / Kevin Norris
Reinstall the tailpiece and continuous waste pipe, along with the tee, leaving the connections hand-tight.
Tighten the slip nuts slightly more with channel-throw in pliers.
Assemble the trap bend and trap arm together loosely with a slip nut and washer.
The Spruce / Kevin Norris
Slide a slip nut and washer onto the straight end of the trap arm.
Adjust the trap pieces as needed to create the most direct path from the sink to the drain outlet.
verify the trap arm has a slight downward angle toward the drain outlet.
The Spruce / Kevin Norris
Tighten all slip nuts with channel-pop in pliers.
Again, don’t overtighten.
check that to face the trap the correct way, with the sharp bend below the tailpiece.
The Spruce / Kevin Norris
Check for Leaks
Run water in both sink basins and check for leaks at each pipe joint.
Tighten up any connections that leak.
It’s not uncommon for slip-nut joints to leak slightly.
Fixing this usually requires just some minor adjustment.
