Can I run a 1 1/2'; drain line for clothes washer?

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Can I use an 1-1/2'; drain line for a clothes washer instead of a 2'; line?


ThanksCan I run a 1 1/2'; drain line for clothes washer?
The minimum drain pipe size for a clothes washer is 2 inches and the minimum drain pipe size for a kitchen sink is 1 1/2 inches. You could either upsize the drain pipe for the washer to a 2 inch drain with a 1 1/2 inch vent through the roof that would accomodate both fixtures, or install separate 1 1/2 inch drain line for the new kitchen sink with a 1 1/4 vent through the roof. By the way, all these sizes are minimums per the uniform plumbing code. You can use a larger size if you wish.Can I run a 1 1/2'; drain line for clothes washer?
no





I work with mobile homes all the time, and they used 1 1/2 drain lines for the washers. Older washers would work fine, however the new washers have such a high output of water we have to put in a threaded adapter install a barbed fitting and hose clamp the line to keep it from overflowing.
No.


Although the code might be different elsewhere,


here in California, it's 2';.