Description
The End Plug 13mm is a simple but essential irrigation system component that seals the open ends of 13mm supply tubing in gravity-fed watering systems, AutoPot setups, and drip irrigation networks. Without correctly fitted end plugs, nutrient solution would drain freely from open tube ends — wasting solution, flooding the growing area, and preventing the controlled delivery that precision irrigation systems are designed to provide.
The Role of End Plugs in Irrigation System Design
Every length of irrigation tubing has two ends. One connects to the feed source — a reservoir, manifold, or pump outlet. The other end must be sealed when no additional branches or outlets follow. In a simple drip system, end plugs cap the tubing beyond the final dripper position. In a modular drip system where the layout changes between crops, end plugs allow unused outlets to be sealed while maintaining pressure in the active portions of the system. In AutoPot and similar gravity-fed systems, end plugs seal supply lines that run to future pot positions not yet installed, allowing the system to be expanded progressively without draining or disconnecting the existing setup. The 13mm bore specification matches the standard AutoPot supply tubing, float-valve fittings, and compatible gravity-fed irrigation components in common use across the UK indoor growing market. The plug material is resistant to nutrient solutions, pH adjusters, and the enzyme products routinely used in hydroponic growing systems — it will not degrade or fail from chemical exposure in a correctly managed growing system. At The Horticulture Company we stock a full range of irrigation fittings including end plugs in all standard bore sizes as part of our irrigation system accessories. Having a selection of correctly sized end plugs available means irrigation system modifications can be completed without delay when the grow room layout or plant configuration changes.
Compatibility and Practical Use
Push fit directly onto 13mm OD tubing for a secure, leak-free seal. No tools required. Compatible with all standard 13mm irrigation tubing including AutoPot supply lines, standard drip system tubing, and micro-bore main supply lines of the same external diameter.






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