Active Aqua Bottom Draw Pump Adapter, 1/2 in Thread | For AAPW250 & AAPW400

How the Active Aqua Bottom Draw Pump Adapter Works

This adapter turns a standard Active Aqua submersible pump into a bottom draw pump for emptying reservoirs and tanks. It threads onto the pump's 1/2 in inline port, the same port used when the pump runs outside the water. Once fitted, the pump pulls from the floor of the container instead of from its own intake grille. That lets it draw water down to roughly 3/16 in deep. A pump without it usually stops short and leaves a layer of old solution behind. The fitting has an adjustable lock height, so the draw point can be set to match the floor of the container. Active Aqua lists it for the AAPW250 and AAPW400 pumps, both of which carry the 1/2 in thread. Flow stays steady through the drain, and the threaded joint is built to run without leaking. It weighs about 0.63 lb in its packaging and needs no tools to fit. One part on the pump replaces the separate sump pump many growers keep only for draining.

Using a Bottom Draw Fitting at Reservoir Change

A bottom draw fitting earns its keep every time a nutrient tank needs a full change. Run a drain hose from the pump outlet to a floor drain, a waste bucket or outdoor beds. Thread the adapter onto the inline port by hand until it seats, then set the lock height for the container. Sit the pump flat on the reservoir floor so the intake stays below the waterline. Switch it on and let it run until the flow sputters. Turn it off as soon as the water is gone, because a pump running dry wears its impeller. The tank is then ready for a wipe-down and a fresh batch without lifting anything heavy. This matters most with large totes and tubs that are too heavy to tip once they hold any water. Rinse the fitting after each drain so dried salts do not build up on the thread. Check the pump's model number before fitting it, since other Active Aqua pumps use a different port thread. Kept on the pump between changes, it turns a messy chore into a short one.

Key Features

• 1/2 in inlet thread: Threads onto the inline port of AAPW250 and AAPW400 pumps.
• Draws to 3/16 in: Pulls a reservoir down to a thin film of water.
• Adjustable lock height: Sets the draw point to suit the container floor.
• Steady, leak-free flow: Built for a consistent drain from start to finish.
• No extra pump needed: Uses the submersible already in the reservoir.

Technical Specifications