What is the standpipe on a washing machine?

Washing machines drain into what is called a standpipe. A standpipe is a vertical piece of pipe with an elbow on the bottom. The elbow remains filled with water, preventing sewer gas from backing up into your laundry area.

P2706. 2 Standpipes for automatic clothes washers shall extend a minimum of 30 inches (762 mm) and a maximum of 48 inches (1219 mm) above the finished floor. The trap for a clothes washer shall be installed at a maximum of 12 inches (305 mm) above the finished floor.

Similarly, how do you vent a washing machine standpipe? The correct way to drain a washing machine is to install a standpipe. That is a vertical length of pipe that connects to a P-trap that, in turn, connects to the drain. The top of the standpipe must extend above the overflow level of the washing machine, and it must be properly vented.

Also, does a washer drain need to be vented?

If the drain of your washing machine fits tightly into the drain, you definitely need a washing machine drain vent. It allows air in which prevents the possibility of a vacuum forming that could affect the water draining from your washing machine.

What is the purpose of a standpipe?

Standpipe systems are a series of pipe which connect a water supply to hose connections, basically an extension of the fire hydrant system. They are designed to provide a pre-piped water system for building occupants or the fire department.

Is it OK to extend washing machine drain hose?

It is not advisable to extend a drain hose. The drainage system should be brought closer to the appliance, eg extend the plumbing to the washer. The drain pump is designed to pump water to the extent of the drain hose, no further.

How does a standpipe work?

The standpipe extends into the building to supply fire fighting water to the interior of the structure via hose outlets, often located between each pair of floors in stairwells in high rise buildings. Dry standpipes are not filled with water until needed in fire fighting.

When my washing machine is draining it overflows?

One of the most common reasons for your washing machine drain to overflow is caused by a clog in the drain standpipe. Over time, different items such as dirt, lint, and hair could begin to slowly build-up within the pipe to create a blockage that will stop water from draining fully.

What size drain pipe do I need for a washing machine?

The standard for new washing machine drain sizes, according to the Universal Plumbing Code, is now 2 inches. The pipe should be between 18 and 30 inches high from the floor, while the P-trap should be between 6 and 18 inches from the floor. These standpipes connect into the home sewage system.

Can a washer and sink share a drain?

The plumbing code requires one on every drain and has established rules governing its size and distance from the fixture trap. If you’re joining a washing machine and kitchen sink on the same drain, you may be able to vent them both with a single vent if they are close enough together.

How do you plumb a washing machine drain pipe?

Washer Drain Locate a drainpipe to which you can connect the washer drain. Cut the pipe with a hacksaw and install a wye fitting or a sanitary tee, depending on the orientation of the pipe. Run a length of 2-inch ABS pipe to the wall behind the washing machine.

Can you use an AAV for a washing machine?

in mass, we are not allowed AAV’s but if you are allowed to use one, put it higher than the standpipe. In NC, you can use an AAV on a washing machine trap. The trap can be below the floor.

Do I need a vent for every drain?

Every fixture is required to have an internal or external trap; double trapping is prohibited by plumbing codes due to its susceptibility to clogging. Every plumbing fixture must also have an attached vent. The top of stacks must be vented too, via a stack vent, which is sometimes called a stink pipe.

Can you put Drano down a washing machine drain?

Yes, Drano works just as well in a washer drain. Just make sure you run another load of water before you put laundry in your washing machine.

How do you connect a washing machine sink and washing machine to the same drain?

Many laundry areas have a laundry sink that is used as the drain for the washing machine. The drain hose from the washing machine is hung on the edge of the laundry sink. Water is drained from the washing machine directly into the sink. Connect the washing machine to the sink drain if the drain pipe is a 2-inch line.

Why does a washing machine need a standpipe?

The standpipe assembly keeps the water level of the washer tub below that of the drain, preventing siphoning from the drain or sewer line back into the washer. When backflow does occur, siphoning can cause water to flow back into the washing machine from the drain, or out of the drain onto the floor.

How do I extend my washer standpipe?

The standpipe shall extend not less than 30 inches (732 mm) above the weir of the standpipe trap and shall extend above the flood level rim of the laundry tray. The outlet of the laundry tray shall not be greater than 30 inches (762 mm) horizontal distance from the side of the standpipe.

How far can drain be from vent?

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.