PDFWAC 296-150V-1560
What is the minimum clearance for drain outlets?
The drain outlet and couplers must have a minimum clearance of three inches in any direction from all parts of the structure or appurtenances and with at least eighteen inches unrestricted clearance directly in front of the drain outlet.
[Statutory Authority: Chapter 43.22 RCW. WSR 99-18-069, ยง 296-150V-1560, filed 8/31/99, effective 10/1/99.]