{"product_id":"pvc1037-air-admittance-valve","title":"[PVC1037] Air Admittance Valve","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eAir Admittance Valve\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe Air Admittance Valve is a one-way mechanical vent designed to allow air into a drainage system without requiring a roof penetration, providing a practical alternative to traditional vent piping.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eAs wastewater flows through the drain pipes, it creates negative pressure in the system — the valve automatically opens to admit air, preventing trap seals from being siphoned dry and helping wastewater drain smoothly. Once water flow stops and pressure equalises, the valve closes under gravity, preventing sewer gases from escaping into the building. This mechanical operation requires no electricity or manual intervention.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eReducing the need for roof penetrations helps lower installation costs and reduces the risk of roof leaks over time, making this valve especially useful for fixtures located far from existing vent stacks, or where running traditional vent pipe through walls, attics, and roofs isn't practical. Note that at least one traditional stack vent penetrating the roof is still required for the overall system.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eFinished in white, this single-size valve is suitable for use with both 40mm and 50mm pipe in sewer and vent applications. Manufactured to comply with Australian and New Zealand Standard AS\/NZS 1260, and Watermark certified, this valve is designed for dependable, long-term performance in non-pressure drain, waste, and vent (DWV) applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOne-way mechanical air admittance valve\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSuitable for 40mm and 50mm pipe\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOpens automatically to relieve negative pressure\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCloses to prevent sewer gas escaping\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eReduces the need for roof vent penetrations\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNo electricity or manual operation required\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWhite finish\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSuitable for sewer and vent applications\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProven product in the New Zealand market\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured to AS\/NZS 1260 standards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eApproved Watermark Certificate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eIdeal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eVenting fixtures without a roof penetration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRenovations where running new vent pipe is impractical\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eResidential and commercial drainage systems\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNew builds, renovations, and repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe Air Admittance Valve provides a reliable, code-compliant solution for venting drainage systems without additional roof penetrations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eReliable one-way venting. No roof penetration needed. Code-compliant performance.\u003c\/strong\u003e\u003c\/p\u003e","brand":"NZ Pipe","offers":[{"title":"Default Title","offer_id":40719607300182,"sku":null,"price":7.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0137\/0688\/7254\/products\/IMG_4061_42e93162-5fd1-490b-801e-754f11cd7f38.jpg?v=1709281374","url":"https:\/\/nzpipe.co.nz\/products\/pvc1037-air-admittance-valve","provider":"NZ Pipe","version":"1.0","type":"link"}