{"product_id":"waterman-4800001-air-vacuum-relief-valve-1-5-in","title":"Waterman 4800001 Air Vacuum Relief Valve 1.5 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WATERMAN 4800001 is an air and vacuum relief valve designed to protect piping systems from negative pressure conditions and air pockets that can cause water hammer, flow restriction, or pipe damage. Sized at 1.5 inches, this valve automatically releases trapped air during system startup and admits air to prevent vacuum formation during draining or sudden pressure drops. It is suited for water distribution, irrigation, and plumbing applications where pressure management is critical. Licensed plumbers and irrigation technicians are the primary installers of this type of valve.\u003c\/p\u003e\n\u003cp\u003eThis air and vacuum relief valve is intended for use in residential and light commercial water distribution lines, irrigation mainlines, and similar piped systems where trapped air or vacuum events are a service concern. The 1.5-inch port size accommodates moderate-flow piping runs. Install at high points in the pipeline where air naturally accumulates or vacuum is most likely to develop.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1.5-inch connection size suitable for moderate-flow water lines\u003c\/li\u003e\n  \u003cli\u003eAutomatic air release and vacuum relief in a single valve body\u003c\/li\u003e\n  \u003cli\u003eProtects piping from water hammer and negative pressure damage\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard threaded pipe fittings at 1.5 inches\u003c\/li\u003e\n  \u003cli\u003eDesigned for straightforward inline installation at pipeline high points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation air and vacuum relief valve for 1.5-inch water distribution, irrigation mainline, and plumbing piping systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or qualified irrigation technician in accordance with applicable local plumbing codes and the IPC. Shut off system pressure and depressurize the line fully before removing an existing valve or making new connections. Mount the valve at the highest accessible point of the pipeline to ensure proper air and vacuum relief function. Do not install below grade or in an orientation that restricts the valve float mechanism.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Air and Vacuum Relief\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrder Increment\u003c\/strong\u003e: 1\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: WATERMAN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4800001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WATERMAN","offers":[{"title":"Default Title","offer_id":51396435476786,"sku":"4800001","price":58.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312833927.jpg?v=1782831908","url":"https:\/\/voomisupply.com\/products\/waterman-4800001-air-vacuum-relief-valve-1-5-in","provider":"Voomi Supply","version":"1.0","type":"link"}