Bathroom Sink Drain Pipe Size. Although most bathroom sink drain holes are similar in size to coordinate with the drains and plumbing used with the sinks themselves there is no single standard size for them. Vigo vessel bathroom sink pop up drain and mounting ring in brushed nickel model vg07000bn 29 90. Save 5 00 14 29 90.
Consider drain pipe to be the vertical centerline. But as far as the pipe or standard size pvc for sink drain is concerned it s 2 or 3 inches in diameter it s the measurement that surrounds the center of the drain from both sides.
This makes our bathroom sink drain 1 5 the vent 1 5 the trap arm 1 5 and the p trap 1 5.
The most common size of the drainage hole in a bathroom sink is 1 1 4 inches in diameter although you may also find some with a diameter of 1 1 2 inches or more. Other is 4 inches to left of centerline discharge hole vertical. What can sometimes make bathroom sinks tricky is the fact that some don t come with a drain. A standard rule of thumb is that sewer pipes leading away from a toilet are 3 inches in diameter.
