Radio Flyer
Member
I’m adding an upper-level, interior laundry room. Thanks to previous guidance here, I’ve plumbed the washer drain downstream of the toilet in the adjacent bathroom, like this.
I now need to install a washer drip pan, but because of my interior-wall location and cold climate, instead of direct piping to outdoors, I’m planning to plumb the pan drain to sewer with a small 1” trap covered with mineral oil to reduce evaporation and a 1” vent.
Question: Can I connect the pan drain into the horizontal 2” washer drain underneath the floor? This would be downstream of the washer standpipe and vent, but before meeting the main 3” drain. Would the little 1” drip pan trap be protected, or would the washer drain suck it dry, despite it being downstream of the standpipe vent? (And if so, would making the pan trap larger than 1" help?)
It would look like this.
Thanks for all advice!
I now need to install a washer drip pan, but because of my interior-wall location and cold climate, instead of direct piping to outdoors, I’m planning to plumb the pan drain to sewer with a small 1” trap covered with mineral oil to reduce evaporation and a 1” vent.
Question: Can I connect the pan drain into the horizontal 2” washer drain underneath the floor? This would be downstream of the washer standpipe and vent, but before meeting the main 3” drain. Would the little 1” drip pan trap be protected, or would the washer drain suck it dry, despite it being downstream of the standpipe vent? (And if so, would making the pan trap larger than 1" help?)
It would look like this.
Thanks for all advice!
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