{"product_id":"rain-bird-1-anti-siphon-irrigation-valve-dasasvf100-built-in-flow-control-vacuum-breaker","title":"Rain Bird 1\" Anti-Siphon Irrigation Valve DASASVF100 — Built-In Flow Control \u0026 Vacuum Breaker","description":"\u003cp\u003e\u003cstrong\u003eRain Bird DASASVF100 is a professional-grade 1\" anti-siphon irrigation valve with built-in flow control and a vacuum breaker for reliable above-ground backflow protection.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heavy-duty valve is engineered for commercial and residential irrigation zones that require dependable automatic shutoff, adjustable flow, and prevention of backflow into the potable water supply. Built with a Buna-N diaphragm, an encapsulated low-power solenoid, and a patented vacuum breaker, the DASASVF100 replaces standard 1\" anti-siphon valves and connects to any 24 VAC controller. Its reverse-flow design minimizes diaphragm stress, helping the valve stay closed if the diaphragm fails internally.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this valve prevent backflow and flooding?\u003c\/h3\u003e\n\u003cp\u003eThe DASASVF100 features Rain Bird’s patented vacuum breaker and a reverse-flow chamber that work together to stop back-siphonage and reduce the risk of flooding should an internal diaphragm give way. The top-mounted bleed screw allows either automatic or manual venting to atmosphere, ensuring the line cannot siphon contaminated water back into the supply when installed properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePatented vacuum breaker with bleed screw for manual or automatic operation\u003c\/li\u003e\n  \u003cli\u003eReverse-flow internal layout reduces diaphragm stress during failure\u003c\/li\u003e\n  \u003cli\u003eDesigned for above-ground installation at least 6\" above the highest sprinkler head\u003c\/li\u003e\n  \u003cli\u003eMeets I.A.P.M.O. and A.S.S.E. standards and is CSA approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I fine-tune water delivery for specific zones?\u003c\/h3\u003e\n\u003cp\u003eYes — the valve includes a top-mounted, easy-turn flow control knob so you can dial in the flow rate to optimize spray patterns and avoid misting or runoff. Adjusting flow at the valve helps create uniform coverage across the zone without changing the controller schedule.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFlow range 0.2 to 40 GPM for broad application flexibility\u003c\/li\u003e\n  \u003cli\u003eKnob allows incremental adjustments to match sprinkler performance\u003c\/li\u003e\n  \u003cli\u003eFor flows under 3 GPM or drip setups, install a 200-mesh filter upstream\u003c\/li\u003e\n  \u003cli\u003eHelps reduce misting and overspray for better water efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and specs support durability and performance?\u003c\/h3\u003e\n\u003cp\u003eThe valve is constructed for long service life in outdoor irrigation systems: a Buna-N (nitrile) diaphragm resists degradation in challenging water conditions and a captured-plunger, low-power solenoid conserves electricity while offering durable actuation. Stainless-steel fasteners and a threaded 1\" female inlet\/outlet provide sturdy connections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N diaphragm with water filter and captive spring for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eEncapsulated, low-power solenoid with captured plunger for durability\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty body with stainless screws and 1\" female pipe threaded inlet\/outlet\u003c\/li\u003e\n  \u003cli\u003eOperating pressure range 15–150 psi to cover typical irrigation systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain this anti-siphon valve?\u003c\/h3\u003e\n\u003cp\u003eInstall the valve above ground and position it at least 6 inches higher than the highest sprinkler head on the same branch. Before powering the system, use the external bleed screw to flush debris; follow local plumbing codes and never place another valve downstream of this anti-siphon unit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMount at least 6\" above the highest outlet on the valve line\u003c\/li\u003e\n  \u003cli\u003eFlush the system manually using the external bleed screw before startup\u003c\/li\u003e\n  \u003cli\u003eUse a 200-mesh filter upstream for flows below 3 GPM or for drip lines\u003c\/li\u003e\n  \u003cli\u003eConnect to any standard 24 VAC irrigation controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Rain Bird DASASVF100 is intended for landscapers, irrigation contractors, commercial property managers, and homeowners who need an above-ground, code-compliant anti-siphon valve with adjustable flow. It suits projects that require a rugged valve capable of withstanding variable pressures and water quality, while offering straightforward field adjustments and reliable backflow protection.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a filter for drip irrigation with this valve?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. For flows below 3 GPM or drip systems, install a 200-mesh filter upstream to prevent clogging and protect the valve diaphragm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this valve connect to my sprinkler controller?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The DASASVF100 works with any standard 24 VAC irrigation timer or controller and features a low-power solenoid.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Rain Bird","offers":[{"title":"Default Title","offer_id":54204282241208,"sku":"B00004RAB0","price":78.61,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0636\/7416\/files\/rain-bird-dasasvf100-front-profile.jpg?v=1790628106","url":"https:\/\/canadianlawn.ca\/products\/rain-bird-1-anti-siphon-irrigation-valve-dasasvf100-built-in-flow-control-vacuum-breaker","provider":"Canadian Lawn","version":"1.0","type":"link"}