Could be a batch of faulty valves as this just popped up and we have had delays waiting for them (have bought out 2 different suppliers entire stock). All cans are now shipping with the extra fitting free of charge to swap if you have a noisy one. Also, the bradied hose/AN fittings are totally different so nothing to make the noise.
Anyone that wants a replacement valve or the alternate fitting just email me at:
RXProducts@aol.com with your address and I'll send both out free with instrutions on how to change them. Out of thousands in use there have only been a couple of bad valves in the past but we have started getting some from a second supplier.
Also I appologize for not being on here all the time but we are finishing the build out of the new shop and have been working all night with the move as well as processing orders, etc.
If you want you can also send the can back (just the can, no hoses/brackets) and we will test it and replace anything faulty ASAP.