I am relocating my laundry to a room over my garage. I have an opportunity to put in a floor drain. My old laundry has a floor drain (not sure why — it is carpet and subfloor with only crawlspace below). Putting in the new drain will not be easy. It requires finding space for the trap and crossing a couple of 2×10 joists (12-OC) with 2 inch pipe. I do not intend to slope the floor towards the drain, but do intend to have Marmoleum or vinyl flooring. Again, it is only garage/shop below. So at worst I would lose drywall and insulation and maybe some tools(!). My previous home did not have a drain in the laundry room, but drains/pans seem to be common practice these days?
Plumbing – Should I install a floor drain in the laundry room
drainplumbingwashing-machine
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Best Answer
Consider that a typical washing machine holds roughly 40 gallons of water. Now imagine that all gushing out onto the floor at the same time. I've never seen this happen because of a washing machine failure, but I have seen it happen when the drain line from the washing machine pulled out and it wasn't a very pretty sight. If you have the opportunity to put in a floor drain, I'd do it - it doesn't add much work, but certainly beats ripping out a garage ceiling to replace wet drywall and insulation.