Laundry standpipes must be tall enough to extend past the washing machine’s overflow line—typically 30-36” in height, or 18”-30” above the trap.

How high should the drain pipe be on a washing machine?

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 height is a washing machine drain and hook up set at?





Once you’ve selected the right washing machine outlet box for your situation, it should be installed at a height where the flood level rim (or the top of the drainage outlet) is 32” to 34” above the finished floor.

What is code for washing machine standpipe?

The standpipe for a clothes washer should be at least 18 inches and not greater than 42 inches above the trap weir. The standpipe should be at least 2 inches in diameter.

Does a washing machine waste pipe need to be high?

Yes, the drain hose needs to be elevated and it’s always best to do so at a level that’s higher than the washing machine itself. This will prevent possible siphoning. There are also other steps you can take to ensure that you get the best drainage.

How far should washing machine drain hose go into standpipe?

Washing machine manuals typically specify a minimum height of 39” for the entry of the drain hose into the standpipe or faucet box, and a maximum height of 96” (8 feet).

How do you install a washing machine standpipe?





Quote from the video:
Quote from Youtube video: Code the minimum standpoint height is 18 inches. So from coming up from the trap here we need to have an 18 inch piece of pipe.

Does a washing machine drain need a P-trap?

If they omit the trap and vent, it’s a mistake that can cause problems on two counts. The lack of a P-trap exposes the area to sewer fumes and the lack of venting will cause the drain to run sluggishly and overflow. Washers, like all fixtures, need a trap.

Can a washing machine drain into 1 1 2 pipe?

Drain and Trap Requirements



A 2-inch drain pipe is required for all washing machines. The former requirement of 1 1/2-inch pipe is not enough to handle the fast drainage of modern washers.

Why does a washing machine need a standpipe?

The 18-inch minimum height for a standpipe is designed to prevent water from overflowing as the washer drains. Besides overflowing, if a standpipe is too short, it could create a siphon effect as the washer drains, meaning the washer would continue to drain even if the pump is off.

Does a washer standpipe need a vent?



All plumbing fixtures—including washing machines—must be vented. Improperly vented drains can be sluggish and noisy, and can emit hazardous fumes. Properly vented drains allow the P-trap to do its job: prevent sewer gases from escaping into your home.

How do I extend my washer standpipe?

That isn’t difficult either — remove the ring entirely, wrap some rope packing around the pipe just above the junction (or install a new packing washer, depending on the age of the hardware), slip the ring back over the tube and tighten it onto the threads; doing so compresses the packing and makes the joint …

Where are standpipes required?

In addition, standpipes are required in high-rise buildings and some stage areas in assembly occupancies. Some occupancies also mandate the presence of standpipes, such as detention and correctional occupancies, airport terminals and piers, at certain thresholds.

What is a standpipe riser?



Quote from the video:
Quote from Youtube video: The standpipe outlet is a pressure reducing valve.

What is the size required for a dry standpipe?

Size. Dry standpipes shall be of such size as to be capable of delivering 946 liters (250 gallons) per minute from each of any three outlets simultaneously under the pressure created by one fire engine or pumper, based on the existing city equipment available.

What are the three main considerations that determine the required standpipe system installation?

What are the three main considerations that determine the required standpipe system installation? The building height above or below the level of fire department access, whether a fire sprinkler system is installed, the use and occupancy of the building.

How do you size a standpipe?

Pipe sizing



If the building is protected with an automatic sprinkler system, then the minimum combined standpipe size can be 4 in. (100 mm) if hydraulically calculated. The branch lines of the standpipe system are to be sized hydraulically but cannot be smaller than 2 -1/2½ in. (65 mm).

What are the 4 types of standpipe systems?



Following are four types of standpipes that you will find in use:

  • Wet system. Here, water is in the pipes at all times and is supplied by a water source. …
  • Automatic dry standpipe. Here, there is always air stored inside the standpipe at a constant pressure. …
  • Semi-automatic dry standpipe. …
  • Manual dry standpipe.