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.
Wash. Admin. Code § 296-150V-1560
Statutory Authority: Chapter 43.22 RCW. 99-18-069, § 296-150V-1560, filed 8/31/99, effective 10/1/99.