How far can you run a 2 inch drain pipe?

When builders look only at the table without reading the text, they find that a 2-inch-diameter drain can run a maximum distance of 8 feet to the vent.

How long can a 2 drain be?

2 Fixture drains. The total fall in a fixture drain resulting from pipe slope shall not exceed one pipe diameter, nor shall the vent pipe connection to a fixture drain, except for water closets, be below the weir of the trap. So if you're using 2" PVC, the drain must be less than 8' long horizontally.

How long can a drain line be?

Building codes, plumbing codes and not being able to cut through floor joist in the top and bottom 2” of joist, the pipe generally leaves only 4” to run horizontally and drop at a rate of ¼” per foot of horizontal travel. Therefore, drain line can only run 16 feet before dropping into the ceiling.

How far can a drain run horizontal?

If you have 1- 1/4-inch pipe, the horizontal distance of the vent ought to not be more than 30 inches. For a 1- 1/2-inc pipe the vent must be 42 inches away at the most while a 2-inch pipeline must have an optimum distance of 5 feet.

How far can a sink drain be from the main drain?

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.

The Proper Slope For Drain Pipe-Plumbing Basics

How far can a trap be from a drain?

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

How far can a 2 shower drain be from the vent?

The connection between the fixture drain and the horizontal drain and vent pipe is the only vertical pipe of a combination drain and vent system. 8 feet is the maximum vertical distance.

How far can a vent pipe run horizontal?

If you have 1 ¼-inch pipe, the horizontal distance of the vent should not be more than 30 inches. For a 1 ½-inc pipe the vent should be 42 inches away at the most while a 2-inch pipe must have a maximum distance of 5 feet.

Does every drain need a vent?

Without getting too far into building science, a general plumbing rule of thumb is that every drain needs a trap, and every trap needs a vent. All those traps and drains are designed to prevent sewer gas from entering your home.

Can a drain pipe have too much slope?

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 far can a washer drain be from the stack?

This happens when the drain height is too low. Siphoning can also occur if the drain hose is pushed too far down into the drain pipe. For new Top Load washers, the drain hose should be no more than 5" down into the drain pipe. For Front Load washers, the drain hose should be no more than 7" down into the drain pipe.

How long can a toilet drain run horizontal?

If you're in the IPC, there is no limitation in length for the toilet's trap arm. That's right, no limitation! That means your fixture drain can have an unlimited distance (909.1). Keep in mind your toilet still needs a vent, but your trap arm can be as long as necessary.

What is the maximum length for a tailpiece?

Research has proven that limiting the tailpiece length to 24 inches will help to eliminate the possibility of the trap to self-siphon. The tailpiece may offset but the developed length of the tailpiece must not exceed 24 inches (see Figure 1001.2i).

How far can the P trap be from the shower drain?

The maximum distance between the shower drain and the P-trap is 5 feet. However, the P-trap should be as close to the shower drain inlet as possible. You should even have the P-trap directly under the shower drain for the best results.

How far can a toilet be from the main drain?

If the toilet is less than six feet from the stack, tie the waste line from the new toilet directly into the stack. The toilet can be as far as 10 feet from the stack if the waste line is 4 inches.

How far can vent be from P trap?

trap, the distance from the weir of the trap to the vent pipe opening “shall not” exceed 30 inches.

How many fixture units can a 2 inch vent handle?

There can be 24 fixture units on a 2-inch vent according to national building regulations. This allows for a safe, efficient plumbing setup that delivers consistent results.

How far can plumbing vent be from fixture?

The only vertical pipe of a combination drain and vent system shall be the connection between the fixture drain and the horizontal combination drain and vent pipe. The maximum vertical distance shall be 8 feet (2438 mm). 912.2.

How far can a vent be from a shower?

The maximum distance from a shower trap arm to a vent is usually 5 feet, though some municipalities may allow up to 8 feet.

Can a shower and a toilet share a vent?

Wet vents are typically used when plumbing a bathroom group. So yes the shower can also be vented by the wet vent along with the toilet. There is one major stipulation when wet venting multiple fixtures when a toilet is one of them: the toilet must be the last fixture connected to the wet vent.

How far can a vent be from a bathtub drain?

The only vertical pipe of a combination drain and vent system shall be the connection between the fixture drain and the horizontal combination drain and vent pipe. The maximum vertical distance shall be 8 feet (2438 mm).

How far can a toilet be from a vent stack?

According to the UPC, the distance between your trap and the vent should be no more than 6 feet. In other words, for the vent to work properly, it needs to feed into the drain line within 6 feet of the trapways that connect to it.

Does trap have to be directly below 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. They both work and have seen it many times. But essentially anything below already creates its own p-trap- so using another is redundant.

Can you tie a drain into a vent pipe?

Tying Into a Vent Stack

Individual vents must rise above the overflow line of the topmost plumbing fixture in the house before you can tie it to the main vent stack. This is a precaution that prevents the vent from becoming a drain if that fixture's drain gets blocked.