Air Pump 4 Outlets (4 x 1.5 L/Min)

Buy 4 Outlet Air Pump for Indoor Grow Irrigation

The 4-Outlet Air Pump is designed for continuous and quiet operation, thanks to an advanced compression system that reduces vibrations. Its lightweight and stable body allows for placement near the tank without performance loss, while the integrated speed control makes it easy to calibrate the flow rate to each aeration line.

With four parallel outlets, it is easy to distribute dissolved oxygen (DO) in mixing tanks, DWC buckets or return lines, improving pH and EC homogeneity through constant agitation.

The set delivers 4 × 1.5 L/min (approximate total 6 L/min ), an ideal flow rate to feed diffuser stones of 25–50 mm and micro-perforated rings.

For a complete installation, non-toxic silicone tubes of 4–6 mm, non-return valves and diffuser stones or balls are sufficient (accessories not included).

Basic maintenance—changing membranes when they lose elasticity and cleaning the intake filter—keeps air delivery stable for months.

All of this translates into healthier roots, a lower risk of anaerobiosis, and better dissolved nutrients, which are essential when watering indoor crops with precision.

Indoor Growing Air Pump with 4 Outlets

Constant aeration in indoor growing offers numerous advantages: increased dissolved oxygen for the rhizosphere, reduced temperature stratification in the reservoir, and a homogeneous nutrient mix before each watering. With the 4-Outlet Air Pump, it's possible to oxygenate a main tank and, simultaneously, two auxiliary trays and an RDWC return line, or four small DWC pots. The balanced distribution of bubbles helps maintain white roots, reduces odors, and promotes stable mineral absorption in cannabis plants .

What is the purpose of a 4-outlet air pump?

It serves to increase dissolved oxygen (DO) in nutrient reservoirs, prevent dead zones, improve fertilizer dissolution, and maintain microcirculation through bubbling. In drip irrigation systems , pre-aeration limits precipitation in the tank; in DWC/RDWC systems, it keeps roots active and reduces the risk of anaerobic pathogens. It also allows freshly prepared solutions to mature and stabilize parameters before dosing.

Indoor growing irrigation accessories: 4-outlet air pump

To get the most out of the system, compatible irrigation accessories are recommended: 4–6 mm non-toxic silicone tubing, non-return valves (to prevent backflow to the pump), fine-pored diffuser stones , T-connectors, and line regulators. Using different-sized stones at each outlet allows you to adjust the bubbling in each zone; a small manifold with taps makes it easy to balance the flow between tanks.

How do I use the 4-Outlet Air Pump?

• Location: Place the pump on a dry surface and elevated above the water level, or, if it is below, install non-return valves in each line.
• Connection: attach silicone tubes to the 4 outlets , install diffuser stones and fix them at the bottom of the tank.
• Adjustment: Use the flow regulator and, if applicable, micro-taps on each branch until uniform bubbling is achieved.
• Verification: Check that there are no blockages, check that all stones emit fine and constant bubbles.
• Maintenance: clean or replace stones when they lose flow; check inlet filter and membranes periodically.
• Good practices: keep the equipment ventilated, avoid direct splashes and replace diffusers regularly to maintain an effective 6 L/min .

Price of 4-Outlet Air Pump

The price is outstanding for its balance between performance and durability: 4 x 1.5 L/min delivery, integrated regulation, and quiet operation. A cost-effective investment for improving oxygenation and mix stability in any home or professional grow room .

Where can I buy a 4-outlet air pump online?

Available at Hydroponics Blanes , a trusted grow shop and online store with discreet shipping throughout Spain. We offer advice on sizing aeration based on tank volume, choosing diffusers, and combining them with irrigation accessories . A leading grow shop in Spain for indoor cultivation of any scale.

Quick fact sheet: 4 outlets · 4 × 1.5 L/min (≈ 4 × 90 L/h ) · speed control · quiet operation · suitable for nutrient tanks, DWC and RDWC · compatible with 4–6 mm tubing and diffuser stones (not included).

The 4-Outlet Air Pump provides constant oxygenation and homogeneous mixing with a simple and expandable design. An essential tool for stabilizing nutrients, promoting active root growth, and watering indoor crops more reliably, backed by the technical and logistical support of Hydroponics Blanes .