AQUANEAT Aquarium Air pump Splitter,Fish Tank Air Valve, Metal Stainless Steel Control Valve for Pump Accessories(X-Small 2 Way)

I use this dual valve system to reduce the pressure of air flow going to a single stone in my mini tank & for this it has worked to perfection, allowing me to “fine tune” the amount of bubbles produced by it. The stone is connected to the one fully open valve & by partially closing the other valve it allows me a measure of control I could not have without it.

Very well made and exceptional for the price. Fits perfectly and doesn't leak so far.

Valves work well ..they hold there seal

A little hard to understand, works for two items. You aren't going to be able to only put this in one item. You're going to need two things to put it in, otherwise you'll be hearing the air escape the other tube. I guess that's the point. And I'm happy because it eliminated the need for a second air pump for my betta's air stone.

High quality air line splitter, way to use. No plastic.

Happy with it all. Air pump is so quiet, no one can hear it. Aquarium located in the living room.

Well constructed splitter for air lines. Getting the right flow can be touchy but once it's there, it's set and won't move again

A little tedious but it gets the job down. You have to play with both knobs to get air flow to both pumps and the right amount of air flow to both pumps.