{"product_id":"automatic-svrs-adjustable-auto-reset-center-thread","title":"Vacless Automatic SVRS Adjustable, Auto-Reset, Center Thread","description":"\u003cp\u003eThe Vacless SVRS-10ADJ is an adjustable safety vacuum release system with automatic reset and a center thread connection. It threads into the pump in place of the suction side drain plug and covers pumps from 0.5 to 10.0 horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow it works\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCentrifugal pool pumps pull a strong vacuum at the inlet. If something blocks the suction side, that vacuum climbs sharply. The valve uses an orthogonal seal, an o-ring on a moving disc that seals on both the face and the radius, held closed by a spring. When the vacuum spikes, the disc moves, the o-ring crosses air channels, and atmospheric air rushes into the pump pot. The pump loses prime and the suction releases. The seal then springs back to its normal position so the pump can re-prime.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy the adjustable model\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePool plumbing is rarely textbook. The adjustable version compensates pneumatically for variations in the piping and filtration system, so it can provide suction relief on runs where a fixed unit would be a poor match. Vacless states the design is compliance tested up to 200 feet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTwo jobs beyond safety\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe same seal movement suppresses surges. It absorbs the vacuum spike at start up, which spares the pump and filter the shock and vibration that shorten equipment life. And because the valve threads out, removing it lets water drain fully from the pump for winterization.\u003c\/p\u003e","brand":"Vacless Systems","offers":[{"title":"Default Title","offer_id":48625788813524,"sku":"VSI-42-1001","price":453.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_97114cdc-f566-4d95-b2ac-d61554eb18b3.jpg?v=1788700051","url":"https:\/\/www.activepoolsupply.com\/products\/automatic-svrs-adjustable-auto-reset-center-thread","provider":"Active Pool Supply","version":"1.0","type":"link"}