IPS 86600 3/4-Inch Arrester for Washing Machine 3/4 inch mht x 3/4 inch fht For use with washing Machine valves Made in United states "AA" Single Fixture Size Guaranteed for the lifespan of the Plumbing System UPC is Listed ASSE Certified to ANSI/ASSE 1010-2004 Standard Approved for sealed wall installations with no access panel required