{"product_id":"macomb-group-approved-660-hb-water-hammer-arrester","title":"Macomb Group Approved 660-HB Water Hammer Arrester","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MACOMB GROUP APPROVED 660-HB is a MiniRester-style water hammer arrester designed to eliminate pressure spikes caused by fast-closing valves in residential and light commercial plumbing systems. Built from 304 stainless steel with an EPDM sealing ring, it handles up to 250 psi working pressure and 250 degrees F operating temperature. The unit measures 5 inches in overall length and connects via a female swivel hose thread inlet and a male hose thread tee outlet. Licensed plumbers and HVAC service technicians install this device as a direct inline solution to protect piping, appliances, and fixtures from water hammer damage.\u003c\/p\u003e\n\u003cp\u003eThis arrester is suited for residential and light commercial applications where hose-connected appliances such as washing machines, dishwashers, or solenoid-valve-fed equipment generate pressure transients. The tee configuration allows the arrester to branch off the supply line without interrupting flow. The AA unit size classification aligns with standard sizing charts based on fixture unit load. It is appropriate for new construction and retrofit installations where hose thread connections are already in place.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e304 stainless steel body with EPDM ring for corrosion resistance and long service life\u003c\/li\u003e\n  \u003cli\u003e250 psi working pressure rating with a 1500 psi burst-tested pressure rating\u003c\/li\u003e\n  \u003cli\u003e250 degrees F maximum temperature rating\u003c\/li\u003e\n  \u003cli\u003eFemale swivel hose thread x male hose thread tee connection for direct inline installation\u003c\/li\u003e\n  \u003cli\u003eAA unit size  -  certified by ASSE to the ANSI\/ASSE 1010-2004 standard\u003c\/li\u003e\n  \u003cli\u003ecUPC listed to UPC and Canadian plumbing codes and standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation water hammer arrester for residential and light commercial plumbing systems using 3\/4 inch hose thread connections, sized AA per ASSE 1010 fixture unit tables.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber in accordance with the Uniform Plumbing Code and applicable local amendments. Shut off the water supply and relieve system pressure before connecting or disconnecting the arrester. The swivel hose thread inlet allows hand-tight positioning before final wrench tightening  -  do not overtighten threaded hose connections. Verify the installation meets ASSE 1010 placement guidelines for proximity to the source valve.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Female Swivel Hose Thread x Male Hose Thread Tee\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit Size\u003c\/strong\u003e: AA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTop to Branch Center\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter to Branch End\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Pressure\u003c\/strong\u003e: 250 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBurst Test Pressure\u003c\/strong\u003e: 1500 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: 304 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeal Material\u003c\/strong\u003e: EPDM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: ASSE certified to ANSI\/ASSE 1010-2004; cUPC listed to UPC and Canadian codes and standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MACOMB GROUP APPROVED\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 660-HB\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MACOMB GROUP","offers":[{"title":"Default Title","offer_id":68081417355570,"sku":"660-HB","price":29.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/293843547.jpg?v=1793138890","url":"https:\/\/voomisupply.com\/products\/macomb-group-approved-660-hb-water-hammer-arrester","provider":"Voomi Supply","version":"1.0","type":"link"}