{"product_id":"heavy-duty-black-poly-tubing-4mm-precision-micro-irrigation-250m-bulk-roll","title":"Heavy-Duty Black Poly Tubing – 4mm Precision Micro-Irrigation (250m Bulk Roll)","description":"\u003csection\u003e\n  \u003ch3\u003eHeavy-Duty Black Poly Tubing – 4mm Precision Micro-Irrigation (250m Bulk Roll)\u003c\/h3\u003e\n  \u003cp\u003eFor large-scale facilities and precision-focused growers, consistent nutrient delivery is non-negotiable. Our Heavy-Duty Black 4mm Poly Tubing is the professional standard for \"spaghetti\" feeder lines, offering a high-performance solution for individual plant irrigation. This massive 250-metre bulk roll is designed to connect main distribution manifolds directly to micro-drippers, stakes, and emitters. The opaque black construction is engineered to be 100% light-proof, preventing the algae growth that is the primary cause of blockages in small-diameter lines. By ensuring your micro-lines remain clean and clear, you guarantee that every plant receives the exact volume of nutrients required for a uniform, high-yielding harvest.\u003c\/p\u003e\n  \n  \u003chr\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Large-scale micro-drip installations, connecting individual dripper stakes, precision fertigation in commercial facilities, and high-pot-count hydroponic systems.\u003c\/p\u003e\n  \n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCommercial Bulk Value:\u003c\/strong\u003e The 250-metre roll is the most cost-effective choice for large-scale operations, providing enough length for hundreds of plant sites with minimal joins and zero wasted material.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTotal Light Blockage:\u003c\/strong\u003e Deep black pigmentation ensures zero light penetration, halting algae blooms in their tracks and protecting your emitters from the bio-film build-up that leads to crop-damaging blockages.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUltra-Flexible Pliability:\u003c\/strong\u003e Specifically formulated for micro-irrigation, this tubing navigates complex plant layouts and tight corners without kinking, ensuring an unobstructed flow of vital nutrient solution.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV-Stabilised Longevity:\u003c\/strong\u003e Manufactured from premium-grade polyethylene built to endure the extreme radiation and heat of professional LED and HPS lighting environments without cracking or becoming brittle.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUniversal 4mm Compatibility:\u003c\/strong\u003e Precision-engineered to fit all standard 4mm barbed micro-fittings, \"take-off\" joiners, and pressure-compensating (PC) drippers for a secure, leak-free seal.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInert \u0026amp; Nutrient Safe:\u003c\/strong\u003e Constructed from high-quality LDPE that will not react with concentrated mineral salts or pH adjusters, maintaining the chemical integrity of your feed.\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 4mm (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\u003eLength:\u003c\/strong\u003e 250 Metre Commercial Bulk Roll\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Precision Micro-Drip and Fertigation 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\u003eSoft-Seal Technique:\u003c\/strong\u003e For a faster and more secure installation onto barbed fittings, dip the end of the 4mm tubing in warm water for a few seconds to increase flexibility before pushing it into place.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUniform Delivery:\u003c\/strong\u003e To ensure every plant receives the same amount of water, try to keep your 4mm feeder lines as close to the same length as possible across your entire manifold.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClean Cuts:\u003c\/strong\u003e Use a dedicated tube cutter or a sharp blade to achieve a perfectly square cut. This ensures the tubing seats fully against the fitting barb, preventing leaks under high pump pressure.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eIdeal For (Uses)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCommercial Fertigation:\u003c\/strong\u003e The primary feeder line for rockwool, coco-coir, and perlite-based commercial grow rooms.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrip Stake Connections:\u003c\/strong\u003e Connecting 13mm, 19mm, or 25mm main supply lines to individual plant sites.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Misting:\u003c\/strong\u003e Suitable for low-flow propagation systems and specialized aeroponic cloning setups.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Holland Forge","offers":[{"title":"Default Title","offer_id":48410714767460,"sku":"5022","price":132.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/6487\/0244\/files\/ChatGPTImageMay13_2026_10_36_34PM_3f1881de-b5ee-4d4d-a86f-49238c637af1.png?v=1778685266","url":"https:\/\/www.greenhousepolytunnels.com.au\/products\/heavy-duty-black-poly-tubing-4mm-precision-micro-irrigation-250m-bulk-roll","provider":"Greenhouse \u0026 Polytunnels","version":"1.0","type":"link"}