Probably. All of our replacement Nitrox Ready SCUBA valves have an inlet designed to fit 0.750-14 NPSM cylinder neck threads. This fits nearly all North American market SCUBA cylinders of recent manufacture, but there are some rare exceptions. Fortunately, you can use the cylinder neck stamp to determine the answer for yourself.

Assuming your cylinder was manufactured exclusively for the North American SCUBA market in the last 50 years or less, look at the cylinder neck for markings that begin "DOT". If it reads "DOT-3AL-xxxx", "DOT-3AA-xxxx", or "DOT-Xxxxx-3442" it almost certainly has an imperial 0.750-14 NPSM threaded neck opening, referred to in the trade as 3/4 NPS. SCUBA cylinders recently manufactured for other areas may have the name of their thread form stamped on the neck. If the neck stamp includes "3/4 NPSM" or "0.750-14" then the cylinder has a 0.750-14 NPSM threaded opening. Our replacement Nitrox Ready SCUBA valves will fit any of these cylinders.

There are some rare exceptions, especially for cylinders with very high service pressures or manufactured before 1970; for more information please read our article SCUBA Valves: Regulator Fittings, 200 vs 300 Bar FAQ and Cylinder Neck Threads.