Washing Machine Drain Without Vent

If the washing machine drain continues to have backflow problems ensure the drain vent is connected and properly working.

Washing machine drain without vent.

If they omit the trap and vent it s a mistake that can. A washing machine drain vent serves a very important purpose. It allows air in which prevents the. The piping in the photo on the left represents a laundry sink drain while the photo on the right depicts a washing machine s stand 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. If the drain of your washing machine fits tightly into the drain you definitely need a washing machine drain vent. In your scenario if a fixture that s farther upstream discharges lots of water that rushes by the wye fitting where your washing machine drain pipe connects the vacuum created by the water rushing past the washing machine branch wye will siphon water from your trap. All household drains are vented to a drain vent typically located on the.

In each a is the vent b is the trap arm and c is the drain. If your drain is not at least 30 from the base of the washer you can use an anti siphon clip to attach the hose to the back of the washer. Kevin the answer is no. Without having the drain hose located high enough gravity will take over and the water filling the washing machine will run out of the hose and into the floor drain.

They may also see that the slope column references 1 4 inch per foot but they are likely to assume that it s just reiterating the minimum allowable slope for a 2 inch drain. If the drain lines in your home have poor venting as in figure a for example water rushing down the drains will pull water from nearby p traps. This is the purpose of a venting system. Although not always mandated by building codes it s a good idea to put one in when you install a washing machine.

When hooking up a new washing machine some people look for a convenient drain line and simply install a pipe that extends to the washer.