Active Aqua Dual Diaphragm Air Pump (25 L/min)

The pump's four-outlet divider can supply air directly to four separate lines. By adding standard tees to each line, you can distribute airflow to up to twelve hydroponic buckets or reservoirs simultaneously. Output volume per air stone will decrease as more splits are added — for larger systems or applications requiring strong per-stone flow, consider running fewer splits per line to maintain adequate aeration at each site.

The included multi-outlet divider is designed for standard 0.25" (¼") airline tubing — the most common size used with air stones and hydroponic aeration setups. Standard tees and check valves for this tubing size are widely available at most hydroponic retailers if you need to expand the distribution network beyond the four included outlets.

Yes — the dual diaphragm design specifically supports field replacement of worn diaphragms without requiring full pump replacement. Replacement diaphragm kits for Active Aqua air pumps are available separately. This is one of the key long-term cost advantages of the dual diaphragm design over single-piece pump units that must be replaced entirely when output degrades.

Yes. The Active Aqua Dual Diaphragm Air Pump is designed for the consistent, continuous airflow demands of hydroponic applications where reservoir aeration runs around the clock. The dual diaphragm configuration distributes wear across two independent pumping chambers, contributing to the unit's reliability under sustained operation compared to single diaphragm designs.

The pressure rating (>3.77 PSI) reflects the maximum back-pressure the pump can work against before output flow begins to drop — relevant when running longer tubing runs, deeper air stones, or multiple splits off a single outlet. The output pressure (0.026 kPa) is the operating pressure at the outlet under normal conditions. For standard hydroponic aeration depths, both figures are well within the requirements of typical air stone setups.

Yes — using inline check valves on each airline is strongly recommended for any air pump installed at or below the waterline of the reservoir. If power is interrupted, check valves prevent nutrient solution from back-siphoning through the tubing into the pump, which can cause irreversible damage to the diaphragms and internal components. Check valves are inexpensive and widely available in standard ¼" tubing sizes.