What is ISO?
ISO stands for the International Standards Organization. Our ISO valve series conforms to a specific mounting footprint set forth by the ISO organization.

Why should I purchase an ISO valve instead of a non-ISO valve?
The ISO series is supported by many manufacturers. If you are in a breakdown situation, you can use anyone's ISO valve to get your machine running.

What do the numbers 1, 2, 3, 4 and 5 mean on my base?
These are port markings.