VA4 Airgap Washing Machine Wall Box Drain – Fresh Water Systems
What should I do about this washing machine drain? Currently the drain hose would be in contact with trap water but shouldn't there be an air gap? : r/DIYUK
VA4 | Lee Supply
Water Softener Air Gap for installation in Washing Machine box with 2-inch Drainpipe (61-S, GAP-IT, AG140-001) - Amazon.com
Do you really need to elevate the drain hose of the washing machine? Why do manufacturers say so? - Quora
Definition of Air... - Master Plumber's Review and Tutorial | Facebook