Hydroponic Tub Outlet | 13mm, 19mm & 25mm Tank & Reservoir Bulkhead Fittings

Every hydroponic reservoir, grow tray, and nutrient tank needs a reliable exit point for water and nutrient solution. Without a properly sealed outlet, you're relying on improvised connections that leak, fail under pressure, or require constant attention. Hydroponic tub outlets solve this at the source, creating a permanent, watertight connection point through the wall of any container so your irrigation system can run cleanly and consistently without intervention.

Available in 13mm, 19mm, and 25mm sizes, these bulkhead-style fittings install through a drilled hole in your tank or tray wall and lock into place with a threaded nut and rubber seal. The barbed outlet connects directly to standard hydroponic irrigation tubing, giving you a secure, leak-resistant flow path for gravity-fed drainage, pump-driven recirculation, or flood and drain cycle management. A straightforward fitting that underpins the reliability of your entire system.

How It Works

Insert the fitting through the correct size drilled hole in your tank, reservoir, or grow tray wall. Thread the locking nut onto the fitting from the outside and tighten against the rubber seal to create a watertight bulkhead connection. Push your irrigation tubing onto the barbed outlet to complete the connection. The barbed design grips the inner wall of the tubing to prevent pull-out under normal operating pressure, maintaining a consistent, leak-free flow path for the life of your system.

Key Benefits

• Available in 13mm, 19mm, and 25mm sizes. Covers the full range of standard hydroponic tubing sizes, from small feeder lines through to high-flow main supply lines.
• Leak-resistant bulkhead fitting design. Threaded body with rubber seal creates a watertight connection through container walls, eliminating the slow drips that undermine system reliability.
• Barbed outlet for secure tubing connection. Barbed design grips irrigation tubing firmly to prevent pull-out and maintain consistent flow under pump pressure.
• Suitable for tanks, reservoirs, and grow trays. Installs in any container with a drilled hole, making it compatible with a wide range of hydroponic system configurations.
• Supports gravity-fed and pump-driven systems. Works equally well as a drain outlet, a pump inlet connection, or a flood and drain system fitting.
• Durable high-strength polymer construction. Built for long-term use in nutrient-rich hydroponic environments across multiple grow cycles.
• Easy installation with threaded locking system. No specialist tools required, besides a drill for the hole.

Applications

• Hydroponic reservoir and nutrient tank outlet connections
• Grow tray drainage and flood and drain system plumbing
• Drip irrigation tank inlet and outlet fittings
• Recirculating hydroponic system connections
• Greenhouse irrigation tank plumbing
• Nutrient solution transfer between containers

Technical Specifications

• Sizes. 13mm / 19mm / 25mm
• Connection Type. Barbed outlet with threaded bulkhead
• Includes. Threaded bulkhead body, locking nut, rubber seal/gasket, barbed outlet
• Material. High-strength polymer
• Function. Tank outlet and inlet connection
• Application. Hydroponics, irrigation, fertigation systems
• Environment. Indoor, greenhouse, commercial systems
• Weight. Approx. 0.05 to 0.15 kg per unit (size dependent)

Frequently Bought Together

Tub outlets work as part of a complete plumbing setup. For flood and drain systems, pair with the Flood & Drain Fitting Full Set which includes the inlet, drain, and overflow components needed for a complete ebb and flow installation. Run your nutrient solution between containers using Hydroponic Soft Tube in 13mm through 25mm for kink-free, flexible irrigation lines. Power your recirculating system with the Rio HF Submersible Water Pump, available in flow rates from 990 to 7300 L/hr to suit systems of any scale.