{"title":"Anti Siphons Valve Irrigation","description":"\u003cdiv class=\"collection-description\"\u003e\n\u003ch1\u003eAnti-Siphon Valves for Irrigation Systems\u003c\/h1\u003e\n\u003cp\u003eProtect your hydroponic and traditional irrigation setups with our premium \u003cstrong\u003eanti-siphon valves\u003c\/strong\u003e. Engineered to prevent backflow and contamination, these components are essential for maintaining water purity and system efficiency.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Anti-Siphon Valves?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackflow Prevention:\u003c\/strong\u003e Stops contaminated water from re-entering your clean supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e Meets UK water regulation standards for irrigation systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Built from corrosion-resistant materials for long-term performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Compatible with most hydroponic and outdoor setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIdeal for Hydroponics \u0026amp; Sustainable Gardening\u003c\/h2\u003e\n\u003cp\u003eWhether you're running a commercial grow room or a backyard greenhouse, anti-siphon valves are a must-have for maintaining system integrity. Our collection features models suited for \u003cstrong\u003elow-pressure drip systems\u003c\/strong\u003e, \u003cstrong\u003eautomated irrigation\u003c\/strong\u003e, and \u003cstrong\u003enutrient delivery lines\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eBrowse below to find the perfect anti-siphon solution for your irrigation setup.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"floraflex-air-bleed-valve-3-4","title":"FloraFlex Entlüftungsventil 3\/4\"","description":"\u003cp\u003e\u003cstrong\u003eMachen Sie sich keine Gedanken um die Fütterung und übernehmen Sie die Kontrolle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSie benötigen die \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/pvc-pipe-fittings\"\u003ePVC-Verbindung mit Innengewinde\u003c\/a\u003e, um sie an das Rohr anzuschließen. \u003c\/p\u003e\n\u003cp\u003eDas Flora Flex® Entlüftungsventil (3\/4 Zoll) sollte an der höchsten Stelle (über dem Verteiler) jeder Hauptleitung installiert werden, um Luftschlüsse zu verhindern.\u003c\/p\u003e\n\u003cp\u003eWenn Wasser zu fließen beginnt, wird Luft aus dem Entlüftungsventil gedrückt. Sobald Wasser auf das Ventil trifft, schließt sich dieses und Wasser fließt ungehindert durch die Leitung. Dieses Produkt gibt Ihnen mehr Kontrolle über die Genauigkeit Ihrer Fütterungen.⠀\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e¾ Zoll Außengewinde\u003c\/li\u003e\n\u003cli\u003eMaximaler Betriebsdruck 80 psi\u003c\/li\u003e\n\u003cli\u003eMinimaler Betriebsdruck 5 psi (öffnet sich, wenn der Druck unter 5 psi sinkt)\u003c\/li\u003e\n\u003cli\u003ePVC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FLORAFLEX","offers":[{"title":"Default Title","offer_id":39634546852024,"sku":"51","price":9.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/floraflex-pipes-hoses-fittings-floraflex-air-bleed-valve-3-4-the-hydro-bros-1254946548.jpg?v=1787691372"},{"product_id":"16mm-anti-siphon-valve","title":"Anti-Siphon Valve","description":"\u003cp\u003e\u003cspan\u003eAnti-Siphon Valve for bleeding air from irrigation supply tube to prevent a siphoning effect after the drip system turns off. Best positioned at top of the waterbutt, connected to a Tee Piece.\u003c\/span\u003e\u003c\/p\u003e","brand":"The Hydro Bros","offers":[{"title":"16mm","offer_id":43028479148247,"sku":"6973","price":5.5,"currency_code":"GBP","in_stock":true},{"title":"20mm","offer_id":44059984822487,"sku":"9207","price":6.5,"currency_code":"GBP","in_stock":false},{"title":"25mm","offer_id":44059569258711,"sku":"9205","price":6.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/the-hydro-bros-pipes-hoses-fittings-anti-siphon-valve-the-hydro-bros-1254951713.jpg?v=1787327113"},{"product_id":"netafim-dnl-dripline-non-leakage-valve","title":"Netafim DNL – Dripline Non-Leakage Valve (HSP-HPASV)","description":"\u003cp\u003e\u003cstrong\u003eNetafim DNL – Dripline Non-Leakage Valve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eNetafim DNL\u003c\/strong\u003e (Dripline Non-Leakage) valve is the simple solution to one of the biggest headaches in drip irrigation and hydro systems: drain-back and siphoning. By shutting tight when pump pressure drops, the DNL keeps your lines full of water, prevents airlocks, and stops gravity from pulling nutrients where they don’t belong. This item is also known as a High Pressure Anti-Siphon Valve.\u003c\/p\u003e\n\u003cp\u003eHas a 1\/2\" male thread; pair it with a \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/12-female-bsp-to-34-female-bsp-reducing-socket\"\u003ereducing socket\u003c\/a\u003e to fit 3\/4\" pipe work. \u003c\/p\u003e\n\u003ch2\u003eWhy use a Netafim DNL?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents drain-back:\u003c\/strong\u003e Lines stay primed between cycles, so your drippers start flowing instantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStops siphoning:\u003c\/strong\u003e Protects against unwanted run-off from downhill or lower-lying drippers when the pump switches off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates airlocks:\u003c\/strong\u003e No more trapped bubbles blocking drippers at startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEven distribution:\u003c\/strong\u003e Ensures all drippers open together once the system reaches the set pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven reliability:\u003c\/strong\u003e Built with Netafim’s trusted quality for years of trouble-free use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePressure-Compensated Drippers \u0026amp; Siphoning\u003c\/h2\u003e\n\u003cp\u003eEven \u003cem\u003epressure-compensated (PC) drippers\u003c\/em\u003e can still siphon if they sit lower than the reservoir or mainline. While their diaphragm shuts flow under low pressure, it isn’t a true check valve—gravity can still pull water through. Installing a DNL at the start of your line stops this problem cold, holding pressure in the pipe and preventing unwanted dripper run-on after irrigation ends.\u003c\/p\u003e\n\u003ch2\u003eHow it works\u003c\/h2\u003e\n\u003cp\u003eThe DNL is a compact check valve with a pressure threshold (commonly 0.2, 0.4, 0.6 or 0.8 bar). When line pressure is below the threshold, the valve shuts completely, locking water in place. Once your pump reaches the required pressure, the valve opens and water flows normally through your drippers.\u003c\/p\u003e\n\u003ch2\u003ePerfect for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic dripper systems with “up-and-over” pipe runs\u003c\/li\u003e\n\u003cli\u003eGrow setups with uneven elevation or multiple tiers\u003c\/li\u003e\n\u003cli\u003ePreventing nutrient waste and unwanted siphoning\u003c\/li\u003e\n\u003cli\u003eKeeping drippers primed and consistent between irrigation cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePro tip: Combine the Netafim DNL with an automatic air release valve at the highest point of your line for a bulletproof irrigation setup that prevents both drain-back and trapped air.\u003c\/em\u003e\u003c\/p\u003e","brand":"NETAFIM","offers":[{"title":"DNL Only","offer_id":57224276246901,"sku":"7387","price":7.9,"currency_code":"GBP","in_stock":true},{"title":"Barbed 16mm DNL kit","offer_id":57224276279669,"sku":"7388","price":15.0,"currency_code":"GBP","in_stock":true},{"title":"Barbed 25mm DNL kit","offer_id":57224276345205,"sku":"13020","price":18.0,"currency_code":"GBP","in_stock":true},{"title":"3\/4” Threaded Female DNL kit","offer_id":57224276377973,"sku":"13021","price":12.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/netafim-pipes-hoses-fittings-netafim-dnl-valve-anti-siphon-airlock-protection-the-hydro-bros-1254940016.jpg?v=1787331855"},{"product_id":"floraflex-micro-drip-lateral-flush-valve","title":"Floraflex Lateral Flush Valve – Air Relief \u0026 System Flush","description":"\u003cp\u003e\u003cstrong\u003eLateral Flush Valve – Keeps Your Irrigation Running Smooth\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eLateral Flush Valve\u003c\/strong\u003e is a simple but vital component that helps prevent clogging and air build-up in your irrigation system. Installed at the end of each watering zone, this valve \u003cstrong\u003eflushes debris before every irrigation event\u003c\/strong\u003e and \u003cstrong\u003ereleases trapped air\u003c\/strong\u003e as the system fills with water — protecting your emitters and maintaining consistent performance.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-in-1 design:\u003c\/strong\u003e Combination air relief and flush valve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents clogging:\u003c\/strong\u003e Automatically flushes debris before each cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir relief function:\u003c\/strong\u003e Expels trapped air to stabilise water flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable build:\u003c\/strong\u003e Made from weather-resistant, non-corrosive materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy maintenance:\u003c\/strong\u003e Removable top for quick access and cleaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable flow diaphragm:\u003c\/strong\u003e Flip for low or high flow applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFlow \u0026amp; Pressure Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Flow Side:\u003c\/strong\u003e 2–5 GPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Flow Side:\u003c\/strong\u003e 5–12 GPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Pressure:\u003c\/strong\u003e 8–25 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMaintenance \u0026amp; Diaphragm Cleaning\u003c\/h3\u003e\n\u003cp\u003eTo remove or adjust the diaphragm, rotate the green locking ring \u003cstrong\u003ecounter-clockwise\u003c\/strong\u003e to lift the cover. You can then remove the diaphragm for cleaning or flip it over to switch between low-flow and high-flow configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eTip: Always install the Lateral Flush Valve at the \u003cstrong\u003eend of your watering zone\u003c\/strong\u003e for the best performance and system protection.\u003c\/em\u003e\u003c\/p\u003e","brand":"FLORAFLEX","offers":[{"title":"Flush Valve Only","offer_id":55907300737397,"sku":"7687","price":6.0,"currency_code":"GBP","in_stock":true},{"title":"Flush Valve Remote","offer_id":57518957625717,"sku":"13252","price":18.0,"currency_code":"GBP","in_stock":true},{"title":"Flush Valve + Male Adaptor","offer_id":55907300770165,"sku":"7688","price":8.0,"currency_code":"GBP","in_stock":true},{"title":"Flush Valve + 16mm Threaded Barbed Tee","offer_id":55907300802933,"sku":"12191","price":9.0,"currency_code":"GBP","in_stock":true},{"title":"Flush Valve + 25mm Threaded Barbed Tee","offer_id":55907300835701,"sku":"7690","price":9.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/floraflex-pipes-hoses-fittings-lateral-flush-valve-air-relief-flush-valve-for-irrigation-systems-the-hydro-bros-1254948720.png?v=1787313072"}],"url":"https:\/\/www.thehydrobros.com\/de\/collections\/anti-siphon-valves-irrigation.oembed","provider":"The Hydro Bros","version":"1.0","type":"link"}