{"product_id":"tub-outlet-professional-bulkhead-connector-leak-proof-tank-fitting","title":"Tub Outlet – Professional Bulkhead Connector \u0026 Leak-Proof Tank Fitting","description":"\u003csection\u003e\n  \u003ch3\u003eTub Outlet – Professional Bulkhead Connector \u0026amp; Leak-Proof Tank Fitting\u003c\/h3\u003e\n  \u003cp\u003eThe Tub Outlet is a fundamental component for any grower looking to construct a high-performance hydroponic system or custom nutrient reservoir. Engineered for maximum reliability, these fittings provide a permanent, watertight connection through the wall or base of any plastic container. Installation is straightforward: simply drill a 32mm hole, insert the outlet, and tighten the compression nut to create a perfect, leak-proof seal. Whether you are building a recirculating deep water culture (RDWC) system, a flood and drain tray, or a massive nutrient storage tank, these outlets ensure your plumbing remains secure and your grow room stays dry.\u003c\/p\u003e\n  \n  \u003chr\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Constructing custom reservoirs, installing drainage points in grow trays, connecting main feed lines to nutrient tanks, and building DIY hydroponic systems.\u003c\/p\u003e\n  \n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWatertight Compression Seal:\u003c\/strong\u003e Features a high-quality gasket and precision-threaded nut that creates a robust, airtight seal against both flat and slightly curved surfaces.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Impact Construction:\u003c\/strong\u003e Manufactured from heavy-duty, UV-stabilised polymers that resist the corrosive effects of concentrated fertilisers and the intense heat of indoor grow rooms.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile Barb Sizes:\u003c\/strong\u003e Available in 13mm, 19mm, and 25mm options to match standard Australian irrigation tubing, ensuring maximum flow efficiency for your specific application.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSimple 32mm Installation:\u003c\/strong\u003e Standardised for use with a common 32mm hole saw, making it easy to create consistent, professional-grade plumbing entries across multiple reservoirs or trays.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLow-Profile Internal Design:\u003c\/strong\u003e Engineered to sit as flush as possible against the inside of the tank, allowing for maximum drainage and preventing the \"dead zones\" of stagnant water found in taller fittings.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStandard Compatibility:\u003c\/strong\u003e Designed to fit perfectly with SeaHawk screens and extensions, allowing you to build a fully modular flood and drain or overflow system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e13mm Tub Outlet:\u003c\/strong\u003e Ideal for smaller feed lines, individual pot connections, and low-volume nutrient delivery.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e19mm Tub Outlet:\u003c\/strong\u003e The standard size for Ebb \u0026amp; Flow drainage and medium-flow recirculating systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e25mm Tub Outlet:\u003c\/strong\u003e The professional choice for high-volume main lines, large-scale reservoir drainage, and high-flow manifold systems.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHole Saw Requirement:\u003c\/strong\u003e 32mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Horticultural-Grade ABS Plastic\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeal Material:\u003c\/strong\u003e Chemical-Resistant Rubber Gasket\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Black (Opaque to prevent light penetration)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Reservoirs, Grow Trays, and Header Tanks\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eGrower's Best Practices\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrilling for Success:\u003c\/strong\u003e When drilling your 32mm hole, use a high-quality hole saw at a medium speed to prevent melting the plastic. Ensure you remove any plastic burrs from the edge of the hole to guarantee a flat, leak-proof seat for the gasket.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThe Perfect Seal:\u003c\/strong\u003e Always place the rubber gasket on the \"wet\" side (inside) of the tank or tray. Hand-tighten the nut firmly; do not over-tighten with tools, as this can compress the gasket unevenly or stress the threads.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStrategic Placement:\u003c\/strong\u003e If using as a drain, install the outlet at the lowest point of the container. If using as an overflow, ensure it is positioned high enough to allow for the desired nutrient volume while leaving a safety margin.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eIdeal For (Uses)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReservoir Plumping:\u003c\/strong\u003e Creating custom intake and return ports for nutrient mixing and storage tanks.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFlood \u0026amp; Drain:\u003c\/strong\u003e Serving as the primary bulkhead for inlet and outlet assemblies in grow trays.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Overflow:\u003c\/strong\u003e Providing an emergency drainage point in top-feed systems to prevent spills in the event of a pump malfunction.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Holland Forge","offers":[{"title":"13mm","offer_id":48410806354020,"sku":"7246","price":3.9,"currency_code":"AUD","in_stock":true},{"title":"19mm","offer_id":48410806386788,"sku":"7247","price":3.9,"currency_code":"AUD","in_stock":true},{"title":"25mm","offer_id":48410806419556,"sku":"7248","price":3.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/6487\/0244\/files\/ChatGPTImageMay14_2026_12_35_22AM.png?v=1778690445","url":"https:\/\/www.greenhousepolytunnels.com.au\/products\/tub-outlet-professional-bulkhead-connector-leak-proof-tank-fitting","provider":"Greenhouse \u0026 Polytunnels","version":"1.0","type":"link"}