Quick Answer

How far can P trap be below drain?

Maximum Distance

According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches.

Does P trap height matter?

If your P-trap is too low, the water in it is more likely to evaporate, allowing sewer gas to flow up the line. UPC code mandates P-trap height must be 6–18 inches above floor level. This height allows for proper functionality and easy repair of the P-trap.

Does it matter where the P trap is located?

How Do P-Traps Work? | Spec. Sense

Does the P trap have to be under the sink?

Even if you are meticulous about never dropping things down the drain, you still need a p-trap under your sink to keep gas out. Sewer gases can rise through the drain pipes in your home, but the u-shaped bend in the p-trap collects water. This water blocks the gases from rising up into your sink.

Can you have 2 P-traps in series?

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.

How do you line a P-trap with a drain?

P-Trap Installation Drain Doesn’t Line Up Bathroom Sink Pipe

What height should a sink p trap be?

The trap is usually attached to the end of the tailpiece, and tailpieces are typically between 6 – 8 inches long (though I’ve seen up to 12). So the “standard” height of a trap would be, 6 – 8″ below the fixture.

Can a P trap be to deep?

The trap seal depth in the P trap should be a minimum of two inches deep and a maximum of four inches – see the diagram below to know how to measure it.

What is the correct height for a washing machine drain?

In order for the drain hose on your Top Load washer to function properly, the drain must be at least 30″ up from the floor and less than 8 feet high. In order for the drain hose on your Front Load washer to function properly, the drain must be at least 24″ up from the floor and less than 8 feet high.

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

In general, if the P-trap doesn’t line up with the drain, you can adjust the length and height of your drainpipes by cutting them or simply slipping them in and out of their fittings.

Do shower drains need P-traps?

According to regulations, all shower drains are required to have P-traps. This includes all fixtures connected to a building’s main plumbing system. P-traps are curved pipes installed under showers and drains of all kinds.

How do I extend my P trap?

Extending a Sink Drain Pipe : Home Sweet Home Repair

Why is there a trap under the sink?

The purpose of the trap is to catch water in the dip in the pipes and keep it there. After you run water down the drain, gravity will keep a plug of water in the dip. (The maximum trap seal depth is 4”.) This plug blocks the odors of decaying sewage from wafting up from the wastewater system and into your home.

How far can a sink be from a vent stack?

There is a vent between the sink P-trap and the point where the waste line goes to the main sewer. The vent can’t be more than 2 1/2 feet from the trap if the waste line has a diameter of 1 1/2 inches. The critical distance is 3 1/2 feet if the waste line is 1 1/2 inches.

Can you put two P traps on a drain?

Yes, in most every home, multiple P traps eventually go into a single drain. The important considerations are that there is proper slope, there’s a vent within a certain distance of the drain (either wet or dry), and that the drains are properly sized.

Does a double sink need two P traps?

Related Articles. 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.

Can two drains share a vent?

Common vent

This very simple concept allows two traps to be vented by the same vent. The two traps and their fixture drains can be either at the same level or at different levels, provided that they are on the same floor. The following diagrams show some of the various approaches to common venting.

What if P trap doesn’t line up?

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. The size is typically 1 1/4-inch in the outer diameter of the plastic pipe.

Do flexible P traps work?

P-traps take on and maintain the shape of a letter p to keep sewer gases out of your house. When you use a flexible p trap, you’re more likely to get the shape wrong, and you’re more likely to accidentally misshape it when you bump the pipe. Or when you bump it, the force might cause it to spring a leak.

Why does my P trap smell?

A p trap is designed to use water to block the sewer gases from leaking up the drain. If a sink’s p trap dies out this can result in a drain that smells bad. To alleviate this problem pour water down the drain to restore the water barrier in the p trap.

How much pitch does a drain pipe need?

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. Many drains either have too little slope or too much slope. That’s right, it is possible to have too much slope in your drain lines.

How deep can traps be?

Typically, traps have a trap seal between 2 – 4 inches. This amount of water allows waste water and debris to flow down the drain, while still providing enough force to prevent sewer gases from pushing past.

Which trap have a high depth of water seal?

Explanation: Gully traps are deep seal traps, the depth of water seal should be 50 mm minimum. It prevents the entry of insects from sewer line to waste pipes carrying wastewater. Explanation: Indian water closet generally uses P. trap and they are made from cast iron or UPV sheet.

Can washer trap below floor?

All traps must be installed on the same floor as the fixture served with the exception of tubs and showers. If you create a waste pipe for any fixture that needs draining, including a washing machine, and the drain doesn’t have a properly installed P-trap, you’re creating a dangerous situation.