Flood & Drain Fitting (Full Set) | 13mm & 19mm Hydroponic Tub Outlet System

Ebb and flow is one of the most reliable and widely used hydroponic methods for a reason. Timed flood cycles saturate the root zone with nutrient solution, then drain completely, allowing roots to breathe between feeds. The quality of your flood and drain fittings determines how well that cycle works. A poorly sealed outlet fitting means leaks, inconsistent water levels, and unpredictable drain cycles. This full flood and drain fitting set is built to eliminate those variables.

Available in 13mm and 19mm outlet configurations, these fittings provide controlled water inlet, drainage, and overflow management for grow trays, flood tables, and hydroponic reservoirs. The full set includes everything needed for a watertight installation, with threaded bulkhead fittings, seals, and barbed outlets that connect directly to standard hydroponic tubing. Whether you're setting up a new ebb and flow system or replacing worn fittings on an existing one, this set gives you a reliable, leak-resistant foundation for consistent flood and drain cycles.

How It Works

During the flood cycle, nutrient solution is pumped into the grow tray and rises to a controlled height set by the outlet fitting height. When the pump stops, gravity pulls the solution back through the drain fitting and into the reservoir below; pulling oxygen down through the grow medium and leaving the root zone flushed and oxygenated ready for the next cycle. The overflow fitting acts as a failsafe, maintaining a maximum water level limit to prevent overfilling regardless of pump timing. Together, the inlet, drain, and overflow fittings give you complete control over every phase of the flood and drain cycle.

Key Benefits

• Full set for complete ebb and flow installation. Includes inlet, drain, and overflow components with seals and washers for a watertight fit straight out of the pack.
• Precise flood level control. Outlet fitting height determines the maximum water level in your grow tray, giving you repeatable, consistent flood cycles every time.
• Overflow protection built in. Prevents overfilling and system instability if pump timers run long or fail to shut off on schedule.
• Leak-resistant bulkhead fitting design. Threaded bulkhead with rubber seals creates a watertight seal through the tray wall, eliminating the drips and slow leaks that undermine system reliability.
• Durable high-strength polymer construction. Built for long-term use in nutrient-rich hydroponic environments across multiple grow cycles.

Applications

• Ebb and flow hydroponic grow trays and flood tables
• Hydroponic reservoir and tank outlet fittings
• Indoor grow room recirculating nutrient systems
• Commercial hydroponic production setups
• Greenhouse flood and drain irrigation systems

Technical Specifications

• Sizes. 13mm / 19mm outlet compatibility
• Connection Type. Barbed outlet with threaded bulkhead
• Material. High-strength polymer
• Includes. Inlet/outlet bulkhead fitting, drain fitting assembly, seals and washers, threaded connection components, outlet barb
• Function. Water inlet, drainage, overflow control
• Application. Ebb and flow hydroponic systems
• Environment. Indoor, greenhouse, commercial systems
• Full Set Weight. Approx. 0.2 to 0.4 kg

Frequently Bought Together

These flood and drain fittings are designed to work as part of a complete ebb and flow system. The NutriCulture Ebb & Flood System is a ready-to-run flood and drain setup that pairs directly with these fittings for replacement or upgrade installations. Power your flood cycles with the Rio HF Submersible Water Pump, delivering reliable flow rates from 990 to 7300 L/hr to fill your grow tray quickly and consistently. Connect your pump to the inlet fitting using Hydroponic Soft Tube in 13mm or 19mm for kink-free, leak-resistant feed lines.