Rough in plumbing for a washing machine?

Question

I am finishing my basement as a mother in law suite and am installing a washer and dryer. My question involves the washer drain. My Washer will be located approx. 20 feet (horizontal) from the nearest drain, my basement is plumbed for a sump pump. My plan is to run my washer drain into the sump pump basin using the sump pump vent pipe, will that work? My next question is since my washer is 20 ft away and the drain pipe needs 1/4 in of drop every 2 ft, and my stand pipe must be a certain height, How high can my washer drain box be mounted to ensure I have the proper drain slope? My third question is since there are no accessible vent stacks close to the washer with exception of the one 20 ft away, can I use a air admittance vent, the valve should have plenty of air to function properly? any help on this would be great.

Answer 1

You had better check your local codes. Most places will not allow you to introduce grey water into a sump. The fines are very stiff. You must use a waste drain. It is the height of the open drain pipe(stand pipe) that goes behind the washer that you need to worry about. You cannot legally drain a washer without an air gap. You cannot hard pipe it. You should vent to the outside, otherwise your basement will get very hot and full of lint. The lint filter will not capture all the lint a dryer puts out. An air admittance vent will not help as you don't need to introduce fresh air, you need to extract hot air. A stand pipe that extends to the top of the washer is high enough. You are limited by the drain hose anyway, so use that as your guide If you have overhead pipes you will need a separate sump pump. In that case you will be working, most likely, with black pipe. If you have never worked with this type of pipe, don't start now. Hire a plumber. Good Luck..

Answer 2

Washing Machine Rough In Plumbing

Answer 3

The 1960s was when these washing machine drains began to be run in 2" pipe with 2" p-trap and drain. The vent was and is to this day 1-1/2" pipe. As clothes washers improved the drain cycle was shortened by the use of stronger pumps. These stronger pumps became a problem for the old 1-1/2" cast iron p-traps, overwhelming them and causing the water to back up the stand pipe and spill onto the floor.

Answer 4

I would just run it out through a cellar window or hole in the foundation and use it to water my garden or lawn. A washing machine pump should be able to pump 8 or 10 feet up and it will save the cost of running the sump pump. Use a sump pump check valve in the washer hose so water doesn't run back into the washer.

Answer 5

If you are going to use 1/8" fall then increase the drain to 3", or you can use 1/4" fall and install the AV after the 2" trap.

Answer 6

Corky had a competent clarification the thank you to do it. explanation why the drain pipe might desire to be on the top of the excellent of washer bathtub is to make advantageous the drain hose won't siphon out any water interior the bathtub throughout the time of wash or rinse cycles, or any water from the P catch back into the wash bathtub. maximum vertical bathtub machines have an impeller pump on the backside of the bathtub which pushes drain water out while the bathtub is spinning at extreme speed. For larger reliability and to maintain expenditures down, the mfrs oftentimes do not placed a examine valve after the pump. for this reason, the anti-siphon layout for the drain hose and standpipe.

Answer 7

i would suggest calling your express plumbing expert. you may need to have this done professionally to make sure everything is settled.