13mm Flood and Drain Tub Outlet - Ebb and Flow Drainage Fitting
Best for: anyone building or maintaining a flood and drain (ebb and flow) hydroponic system who needs a reliable drainage fitting for the growing tray.
Our thoughts
The old listing for this one had gone out with basically no content behind the title, which isn't much use if you're trying to work out whether it's the right fitting for your system - so we've written it up properly. It's a simple, low-cost part, but flood and drain systems live or die on drainage working correctly. Gets the job done properly.
The 13mm Flood and Drain Tub Outlet is a drainage fitting designed for flood and drain (ebb and flow) hydroponic systems. It fits into the wall of your growing tray or tub and connects to 13mm (½ inch) tubing, giving nutrient solution a clear path to drain back to the reservoir once the flood cycle ends.
The fitting's low-profile design lets water drain almost completely from the tray rather than leaving solution pooling at the bottom, which matters for keeping root zones from sitting in stale nutrient between cycles. Like other flood and drain fittings, it should always be positioned above the level of the tank, so that if there's ever a drip, it drains back rather than overflowing.
How it compares
Flood and drain outlet fittings are a fairly standardised part across hydroponic brands, usually differing mainly in build quality and fit.
- Matches the common 13mm tub outlet format used across flood and drain systems from brands including PLANT!T and EcoPlus
- Simple push-fit design rather than a threaded fitting, making it quicker to install into a drilled tray
- Sized specifically for 13mm tubing, so it's a direct swap if an existing outlet on your tray has failed or degraded
Not a product with much room for innovation - it just needs to fit and drain properly, which this does.
Usage guidance
Installation
Fit into a drilled hole in your tray or tub wall, positioned at the lowest point so the tray drains fully rather than leaving standing solution.
Tubing connection
Connect 13mm tubing to the outlet and run it back to your reservoir, keeping the run as short and direct as practical to avoid slow drainage.
Positioning
Always mount above the level of your reservoir tank, so any drips during a flood cycle fall back into the system rather than onto the floor.
Maintenance
Check periodically for root growth or debris blocking the outlet, which is the most common cause of a flood and drain tray not draining fully.
Technical specifications
- Vendor: Nutriculture
- Tubing size: 13mm (½ inch)
- System type: flood and drain / ebb and flow
- Fitting method: push-fit into tray or tub wall
Who this is for
- Growers running or building a flood and drain hydroponic system
- Anyone replacing a failed or damaged tub outlet on an existing tray
- Growers standardising fittings across multiple trays on 13mm tubing
Our take
There's nothing complicated about this fitting - it just needs to drain your tray properly and hold up over repeated flood cycles, and it does. Worth having a spare on hand if you're running a flood and drain system, since a blocked or failed outlet is an easy thing to end up scrambling for mid-grow.
Does exactly what it should, day in, day out.
