Tub Outlet – Professional Bulkhead Connector & Leak-Proof Tank Fitting

Tub Outlet – Professional Bulkhead Connector & Leak-Proof Tank Fitting

The 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.

Best For: Constructing custom reservoirs, installing drainage points in grow trays, connecting main feed lines to nutrient tanks, and building DIY hydroponic systems.

Key Features

• Watertight Compression Seal: Features a high-quality gasket and precision-threaded nut that creates a robust, airtight seal against both flat and slightly curved surfaces.
• High-Impact Construction: Manufactured from heavy-duty, UV-stabilised polymers that resist the corrosive effects of concentrated fertilisers and the intense heat of indoor grow rooms.
• Versatile Barb Sizes: Available in 13mm, 19mm, and 25mm options to match standard Australian irrigation tubing, ensuring maximum flow efficiency for your specific application.
• Simple 32mm Installation: Standardised for use with a common 32mm hole saw, making it easy to create consistent, professional-grade plumbing entries across multiple reservoirs or trays.
• Low-Profile Internal Design: 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.
• Standard Compatibility: Designed to fit perfectly with SeaHawk screens and extensions, allowing you to build a fully modular flood and drain or overflow system.

Available Sizes

• 13mm Tub Outlet: Ideal for smaller feed lines, individual pot connections, and low-volume nutrient delivery.
• 19mm Tub Outlet: The standard size for Ebb & Flow drainage and medium-flow recirculating systems.
• 25mm Tub Outlet: The professional choice for high-volume main lines, large-scale reservoir drainage, and high-flow manifold systems.

Specifications

• Hole Saw Requirement: 32mm
• Material: Horticultural-Grade ABS Plastic
• Seal Material: Chemical-Resistant Rubber Gasket
• Colour: Black (Opaque to prevent light penetration)
• Application: Reservoirs, Grow Trays, and Header Tanks

Grower's Best Practices

• Drilling for Success: 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.
• The Perfect Seal: 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.
• Strategic Placement: 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.

Ideal For (Uses)

• Reservoir Plumping: Creating custom intake and return ports for nutrient mixing and storage tanks.
• Flood & Drain: Serving as the primary bulkhead for inlet and outlet assemblies in grow trays.
• System Overflow: Providing an emergency drainage point in top-feed systems to prevent spills in the event of a pump malfunction.