: Does a washing machine overflow tray get plumbed into a drain line? Does it need a trap? : Wouldn't that trap need to be primed? Or does the tray just catch the first two gallons or so?
Reply: Yes, these pans are supposed to be piped to an appropriate drain receptacle. And yes, a trap primer will be needed if the drain trap where the pan discharge drains to is subject to evaporation. Good Luck. e-plumber