AutoPot 4mm (6mm External) Black Flexi-Pipe — Gravity-Feed Irrigation Tubing Sold by the Metre
Best for: AutoPot system users looking to expand, replace, or build out passive watering setups without paying over the odds
Our thoughts
This is the proper tubing for AutoPot systems — precision engineered to fit those barbed fittings and keep algae out of your lines. Dead simple to cut to length, pushes on cleanly, and the black colour does exactly what it should. If you're running AutoPots and need to extend or replace pipe, this is the one.
AutoPot 4mm flexi-pipe is the gravity-feed irrigation tubing designed specifically for AutoPot systems. Sold by the metre, you cut it to length and push it directly onto AutoPot's barbed connectors — no kits, no complications, no guessing. The 4mm internal diameter (6mm external) sits perfectly with AutoPot's AQUAvalve and tray setup, whilst the black lightproof construction prevents algae growth inside the lines, which matters when you're running a passive system that relies on staying clean.
It's tough, flexible, and easy to work with. If you're expanding an AutoPot system, replacing worn tubing, or setting up for the first time, this is the component that actually matters.
How it compares
This is the system-specific option for AutoPot users.
- Purpose-built for AutoPot barbed fittings — precision fit, no shaving or adapting needed
- Black colour prevents algae as standard (vs. clear tubing which needs managing)
- Significantly cheaper than buying complete AutoPot expansion kits if you only need pipe
- 4mm size prevents blockages better than smaller tubing, reliable flow to individual drippers
- Larger 9mm AutoPot tubing available if you want more flow, but 4mm is the standard for individual pots
Simple logic: if you're using AutoPots, use AutoPot pipe. Compatibility is guaranteed, fitting is tight, and you're not paying for a kit when you only need tubing.
Usage guidance
Installation
Measure the distance from your Header Tank to each pot or group of pots. Push the flexi-pipe firmly onto the barbed connector ends — they'll sit tight and create a water-tight seal. Cut to length with a sharp knife or scissors. No glue, no fittings needed beyond what AutoPot provides.
System expansion
One of the smartest things about AutoPot is the flexibility to add pots incrementally. Buy tubing in lengths that suit your current setup, then add more metres as you expand. This is where buying by the metre saves money.
During the growing cycle
Flush the system during transitions between growing phases. Hand water for the first few weeks until roots reach the bottom of the tray — then the AQUAvalve takes over and the system runs itself. Some growers add isolation valves and extra tubing lengths to make adjustments easier without draining the whole Header Tank.
Maintenance
If flow weakens, flush the lines. After harvest, clean the valves. The 4mm tubing itself rarely blocks if you're using decent nutrients and keeping the system reasonably clean.
Technical specifications
- Internal diameter: 4mm
- External diameter: 6mm
- Material: Flexible polyethylene
- Colour: Black (lightproof, prevents algae growth)
- Supplied: By the metre — cut to your requirements
- Connector type: Pushes onto standard AutoPot barbed fittings
- Compatibility: AutoPot AQUAvalve systems, drip filters, tee-pieces, elbow connectors, and cross connectors
Who this is for
- AutoPot users setting up their first system and need tubing cut to length
- Growers expanding existing AutoPot setups with additional trays or pots
- Anyone replacing worn or damaged tubing in a passive watering system
- Growers who value simplicity — AutoPot is designed to be straightforward, and this tubing keeps it that way
- Budget-conscious growers who don't want to pay for expansion kits when they only need pipe
Particularly suited to home and small commercial growers running gravity-feed systems where reliability and low maintenance matter more than fiddling with the setup.
Our take
This is proper tubing at a sensible price. It's engineered for AutoPot systems, which means it fits right and works properly without any messing about. The black colour keeps algae out — that's non-negotiable on a passive system — and the flexibility means you can route it where you need it without fighting it.
If you're running AutoPots and need tubing, this is the straightforward choice. Cut to length, push it on, and it'll do the job day in, day out. Good time to buy while stock lasts, especially if you're planning an expansion.
