Do you need special plumbing for a double sink?

A double vanity can offer a “his” and “hers” sink. In most cases, you can easily adapt the supply and drain pipes to accommodate two sinks, using tee fittings, special valves, extension pipes and hoses. You may have to vent each sink separately, though, depending on your local plumbing codes.

Does a double sink need two traps?

A double bathroom sink installation rarely requires more than one P-trap. The usual practice is to connect the two sinks to a tee and then feed the tee into a single P-trap, which then connects to the drain.

How many P traps does a double kitchen sink require?

I agree with David(as usual!) It is perfectly fine to have (2) “P” traps, one on eash sink of a (2) sink setup. As long as the “P” traps are not Double Trapped ( more than one trap serving a fixture ) then it is fine as long as the weir is sized correctly.

Can two sinks use the same drain?

One per works just fine and cost difference is negligible. if they don’t have enough access for the drop I could see the need for a single trap. Adding in the trap in the second sink would be fine.

What is a double sanitary tee used for?

The double sanitary tee is generally used at the junction of two different pipes. Generally, the tee connects the two pipes with the vent. This helps to pass fumes and gases out of the system.

Why is s trap illegal?

The “S” trap is prohibited under the Uniform Plumbing Code throughout the United States. This is because the “S” trap will siphon or suck water out from the trap which will end up releasing methane (sewer) gases into the home.

Does each sink need its own P trap?

Having said that, any plumbing fixture directly connected to the sanitary drainage system must be equipped with a water seal trap. That means every single plumbing fixture used to evacuate waste from a building should have its own plumbing trap.

Can a p-trap be higher than the drain pipe?

6 Answers. You attach the p-trap directly to the drainage and manuever the p-traps exits into you existing drain. It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally.

How do I know what size p-trap I need?

If you have 2.5 inches from the bottom of the tailpiece to shelf and 0.5 inches from the drain to shelf you can use CP-trap. First you have to cut 2.5-2.0 inches from the end of the tailpiece. The height of the p-trap is 4.5 inches 5-2.5=2.5 inches or 4.5-2.5=2.0 inches.