4mm Air Line

Flexible airline that keeps oxygen flowing to your roots

This 4mm air line carries the steady stream of air from your pump to airstones and diffusers - the aeration that DWC, RDWC and other reservoir systems depend on to stop roots sitting in stagnant, oxygen-starved water. Poorly oxygenated solution is where root browning, slow growth and root rot start, so a reliable feed line matters more than its price suggests. The flexible, kink-resistant tubing routes cleanly around buckets and tanks and cuts to the exact length each site needs.

Key Benefits

• Standard 4mm bore fits common air pumps, airstones, non-return valves and manifolds
• Flexible and kink-resistant, so airflow stays constant around tight bends and bucket lids
• Cuts to length - run only as much line as each reservoir needs, with no wasted tubing
• Push-fit connection onto standard barbed outlets for a quick, secure seal

How to Use

• Cut the line to length with sharp scissors for a clean end that seats fully
• Push one end onto the pump outlet and the other onto the airstone or diffuser
• Fit a non-return valve in the run if the pump sits below water level, to stop back-siphoning
• Check the fit is snug enough to hold pressure without slipping during a run