QA

Quick Answer: How To Install Offset Drain Pipes For Bathroom Sinks

What if new sink drain doesn’t line up with existing pipes?

Move the trap into the position you need it to be under the tailpiece by pushing it to the side. If the tailpiece will not line up with the trap, move the trap into its original position, tighten the collar with the pipe wrench and obtain a flexible tailpiece extension for your drain.

Can you offset a sink drain?

PVC pipes and elbows are required to create a proper angle that allows pipes to run from the sink drain to the main waste pipe of your home when setting offset drains. Offset sinks with two drains require a lot of work to hook up compared to single drain offsets.

Can you angle a sink drain?

Plan the route of the extension that connects the trap outlet and the drain to determine which fittings you’ll need to direct it along that route. Another easy solution is to angle the trap perpendicular to the drain opening and route the extension with a single 90-degree elbow.

Can you connect two sinks to one drain?

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. Affix the drain assembly to each sink before you install it in the cabinet.

How far below drain should P-trap be?

However, the Universal Plumbing Code stipulates that the total developed length of all tailpieces, arms and fittings connecting the drain to the p-trap must be 24 inches or less. Jennifer Roberts has enjoyed writing since 2008.

Can a sink P-trap be angled?

The only way I can get a P trap to fit under the tub is to use a flexible plastic one and angle it sideways (horizontally) about 45 degrees. The inlet and outlet is essentially at the same height as if it were installed the regular way except they are slanted.

Can you use flexible pipe for sink drain?

Flexible drain parts can be used to quickly connect offset sink drains. It is possible to cut out the pipes under the sink and install a new sink drain using a 45- or a 90-degree bend to make up the difference, but it may not be necessary for a minor misalignment.

What size is a bathroom sink drain pipe?

The standard size for a bathroom sink drain pipe is 1.25 inches in diameter. However, this is determined based on your state’s housing code, and you may find that they suggest 1.5 inches or 1.65 inches in diameter, and your home has been built with this plumbing standard.

Can a sink drain run horizontal?

Drain piping can be horizontal (1/4” per foot), vertical, or 450- vent piping shall be free of sags and be graded and connected to drip back by gravity to drain pipe it serves.

Does P-trap have to be directly below drain?

It doesn’t have to be directly under the shower drain, but it should be as close as possible. Shower drains and traps are notorious for getting hair clogs, and it’s best if they are reachable with a drain snake or cleaning tool of some sort.

What slope should a sink drain be?

The ideal slope of any drain line is ¼ inch per foot of pipe. In other words, for every foot the pipe travels horizontally, it should be dropping ¼ inch vertically.

What is proper slope for drainage?

Lawn Drainage The minimum slope that we work with is two percent, or 1/4 inch per foot. As an example, the grade at a spot four feet away from your house should be one inch lower than the grade at the house. This will assure that water will be directed away from the building.

What is the correct slope for drainage?

The standard slope for proper concrete drainage is a one-quarter inch drop for every foot of length.

What is a tailpiece in plumbing?

The tailpiece, or sink tailpiece, is the straight section of pipe that connects to the bottom of the sink drain fitting. Typically, the tailpiece attaches to the drain fitting with a slip nut—a threaded ring that can be tightened and loosened by hand (or with gentle persuasion from channel-type pliers).

Can you use one P trap for two sinks?

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. The pipes you use to connect the sink to the P-trap are the same type the P-trap is made from.

Does each sink need a vent?

Though it, not a must-have necessity, every drain needs to have a vent pipe. Every drain whether it’s the shower, toilet, sink, or floor drain needs venting. Vents facilitate the prevention of airlocks by allowing atmospheric pressure in drains.