purchasing check valves

Are there any reliable online stores for purchasing pneumatic items? Especially for compressors and check valves? I am aware that the Viair 90c has a check valve on it, but our team is considering buying some plain check valves and an extra compressor.


McMaster has everything you’ll ever need for robots… EVER.


McMaster is a good source. Especially if you are a one day ship from their wharehouse. They a little pricey–you pay for the convenience & you are never sure what brand you will get.

Automation Direct is a good source.

We have bought Vair compressors from Amazon. You need to be careful that you buy one that is legal for competition

AndyMark has the require pressure switch, relief valve & recommended primary pressure regulator.

Q&A have implied check valves are not legal for FRC. (not a listed component)