{"product_id":"orbit-3-4-fpt-brass-anti-siphon-sprinkler-valve-51016-manual-flow-control-heavy-cast-durability","title":"Orbit 3\/4\" FPT Brass Anti-Siphon Sprinkler Valve — 51016 Manual Flow Control, Heavy-Cast Durability","description":"\u003cp\u003e\u003cstrong\u003eOrbit 51016 is a 3\/4\" FPT manual anti-siphon sprinkler valve built from heavy-cast brass to control flow and stop irrigation water from siphoning back into the home supply.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis brass anti-siphon valve combines a forward-flow shutoff with an atmospheric vacuum break to help prevent contaminants from entering potable water. Designed for outdoor cold-water irrigation, the unit offers manual flow control and rugged brass construction for long life. It’s commonly used where local code requires individual zone-level backflow prevention — especially in regions like California — and is intended for above-ground installation where proper elevation above sprinkler heads is maintained.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this valve stop water from flowing back into the house?\u003c\/h3\u003e\n\u003cp\u003eThe Orbit 51016 uses an integrated vacuum-break device paired with manual flow control. When pressure drops or suction occurs, the atmospheric break opens to interrupt reverse flow, protecting the main water line from irrigation return.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrated atmospheric vacuum breaker prevents backflow into potable piping\u003c\/li\u003e\n  \u003cli\u003eManual inline valve lets you shut off or throttle water to the zone\u003c\/li\u003e\n  \u003cli\u003eOperates automatically to break siphon when negative pressure appears\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere and how should I install this anti-siphon valve?\u003c\/h3\u003e\n\u003cp\u003eInstall the valve above the highest sprinkler head it controls — at least 12 inches higher — and mount it above ground on risers for correct operation. Use appropriate fittings and a steel sprinkler key for deep or hard-to-reach setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMount at least 12\" above the highest head in the zone\u003c\/li\u003e\n  \u003cli\u003eAbove-ground riser installation is recommended for reliability\u003c\/li\u003e\n  \u003cli\u003eCompatible with PVC-Lock fittings for quick, glue-free connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and features make this model reliable?\u003c\/h3\u003e\n\u003cp\u003eThe valve’s heavy-cast brass body resists corrosion and physical wear, while the smooth-flow handle provides precise manual adjustment. The design balances durability with straightforward serviceability for landscape irrigation systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-cast brass body for long-term outdoor durability\u003c\/li\u003e\n  \u003cli\u003eEasy-turn flow-control handle for fine adjustment of water delivery\u003c\/li\u003e\n  \u003cli\u003eDesigned for cold-water irrigation applications only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan this replace a whole-system backflow device?\u003c\/h3\u003e\n\u003cp\u003eNot necessarily — local codes vary. In many areas a single backflow preventer at the main connection protects the entire system, while others require anti-siphon valves at each zone. Check local regulations or consult a licensed irrigation professional.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeant as a zone-level anti-siphon solution, not always a substitute for mainline backflow devices\u003c\/li\u003e\n  \u003cli\u003eCommonly required in certain jurisdictions like California\u003c\/li\u003e\n  \u003cli\u003eConfirm municipal code or plumber guidance before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Orbit 51016 appeals to landscapers, irrigation contractors, and homeowners who need a rugged, manual zone valve with built-in anti-siphon protection. It’s a practical choice when code or system design calls for individual zone backflow prevention, and for anyone wanting a brass valve that stands up to outdoor use and gives easy manual flow control.\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 to install this valve above ground?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. For the anti-siphon feature to work, install the valve at least 12 inches above the highest sprinkler head and mount above ground on risers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this valve protect my whole irrigation system?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This valve protects a single zone. Some areas require a mainline backflow device instead — check local code to confirm requirements.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Orbit","offers":[{"title":"Default Title","offer_id":56823703404884,"sku":"B00004S22H","price":61.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/orbit-51016-front-brass-valve_jpg.jpg?v=1786977869","url":"https:\/\/gardenluxe.co.uk\/products\/orbit-3-4-fpt-brass-anti-siphon-sprinkler-valve-51016-manual-flow-control-heavy-cast-durability","provider":"Gardenluxe Uk","version":"1.0","type":"link"}