120v. Direct Triple O Rotary air pump. Has a 3 times the head pressure and air volume. You asked for it and we listened. This little giant allows the diffuser to be dropped 20 feet below the surface. deep. Puts out 20 psi vs the standard 6 psi of the Triple O. This is made for a direct fit replacement within the same Triple O hole pattern.
PLEASE NOTE:
If you have a lamp: The lower nipple is the AIR INPUT and the upper nipple is the AIR OUTPUT. The upper output gets combined with a tee to create 2 output lines to the 2 air input nipples.
If you have a CD unit: The upper nipple (air output) goes to the input on the CD. Note: the CD is a universal flow so it does not matter which one it is connected to.