{"product_id":"heavy-duty-black-poly-tubing-19mm-horticultural-irrigation-line","title":"Heavy-Duty Black Poly Tubing – 19mm Horticultural Irrigation Line","description":"\u003csection\u003e\n  \u003ch3\u003eHeavy-Duty Black Poly Tubing – 19mm Horticultural Irrigation Line\u003c\/h3\u003e\n  \u003cp\u003eReliable fluid dynamics are essential for a high-performing garden. Our Heavy-Duty Black Poly Tubing is the industry-standard choice for mid-sized nutrient delivery lines and custom irrigation manifolds. With a 19mm diameter, this tubing offers the perfect balance between high-volume flow and manageable flexibility, making it the go-to size for many indoor grow tent configurations and greenhouse drip systems. The opaque black construction is engineered to block 100% of light penetration, effectively halting algae growth within your lines—a critical step in maintaining a sterile nutrient solution and preventing frustrating blockages in your drippers and emitters.\u003c\/p\u003e\n  \n  \u003chr\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Secondary delivery lines, constructing manifold systems for 4–12 plants, connecting medium-flow pumps, and standard run-to-waste or recirculating hydroponic setups.\u003c\/p\u003e\n  \n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLight-Proof Algae Prevention:\u003c\/strong\u003e The deep black pigmentation prevents light from reaching your nutrient solution, stopping algae bloom in its tracks and protecting your root zone from pathogens.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile 19mm Diameter:\u003c\/strong\u003e Provides ample flow for multiple dripper sites while remaining easy to route around tent poles and corners, ensuring consistent pressure throughout your system.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV-Stabilised Durability:\u003c\/strong\u003e Manufactured from premium polyethylene designed to resist the intense radiation of LED and HPS lighting, ensuring the pipe won't crack or become brittle over time.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKink-Resistant Performance:\u003c\/strong\u003e Formulated for flexibility without sacrificing structural integrity, allowing for tidy, professional plumbing runs even in tight grow spaces.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStandard Fitting Compatibility:\u003c\/strong\u003e Specifically designed to pair with all standard 19mm barbed irrigation fittings (Tees, Elbows, and Joiners) for a secure, leak-free installation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInert \u0026amp; Safe:\u003c\/strong\u003e High-quality LDPE construction ensures that no harmful chemicals leach into your reservoir, preserving the purity and flavour of your final harvest.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e19mm x 10 Metre Roll:\u003c\/strong\u003e The ideal length for hobbyist tents (1.2m to 2.4m) and individual reservoir-to-tray connections.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e19mm x 30 Metre Roll:\u003c\/strong\u003e Excellent bulk value for commercial facilities or growers managing multiple rooms and larger irrigation networks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 19mm (Internal Diameter)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Low-Density Polyethylene (LDPE)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Opaque Black (Light-Proof)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePressure Rating:\u003c\/strong\u003e Optimized for standard horticultural water pumps\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydroponics, Aquaponics, and Soil-based Drip Systems\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSecure Connections:\u003c\/strong\u003e For a professional seal, use a cup of hot water to soften the end of the tubing before pushing it onto 19mm barbed fittings. This ensures a tight, leak-proof fit every time.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManifold Design:\u003c\/strong\u003e 19mm tubing is the ideal \"secondary\" line size; run it from a 25mm main line to create high-pressure manifolds for your individual plant sites.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeasonal Hygiene:\u003c\/strong\u003e Periodically flush your lines with a horticultural cleaning solution to remove mineral salt build-up and maintain maximum flow efficiency.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eIdeal For (Uses)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrip Irrigation:\u003c\/strong\u003e Serving as the primary supply line for 4mm or 6mm micro-tubing take-offs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Returns:\u003c\/strong\u003e Acting as a reliable drainage or return line for smaller flood-and-drain or top-feed systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePump Connections:\u003c\/strong\u003e The perfect fit for most standard 1000L\/h to 3000L\/h submersible pumps.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Holland Forge","offers":[{"title":"19mm x 10 Metre","offer_id":48410699366500,"sku":"7439","price":28.9,"currency_code":"AUD","in_stock":true},{"title":"19mm x 30 Metre","offer_id":48410699399268,"sku":"4070","price":75.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/6487\/0244\/files\/ChatGPTImageMay13_2026_10_36_34PM_ce8a9a7b-490e-4609-9ba4-aef770330c4d.png?v=1778683923","url":"https:\/\/www.greenhousepolytunnels.com.au\/products\/heavy-duty-black-poly-tubing-19mm-horticultural-irrigation-line","provider":"Greenhouse \u0026 Polytunnels","version":"1.0","type":"link"}