Alien Water Filters are available in 4 Sizes: 16mm, 3/4", 1" and 1 1/4"

• 16mm Supplied with hose tails
• 3/4"Â Works in conjunction with 3/4" ball valve and hose tails.
• 1" is for use with 1" female fittings and is Used in RAINâ„¢ & AEROâ„¢ header pot 4-18 pot systems.
• 1 1/4" is for use with 1 1/4" female fittings and is Used in RAINâ„¢ & AEROâ„¢ header pot 4-18 pot systems.