Just called airgas in Billerica. $22.00 for an exchange...yickes!!
AquaMan, where are you getting your refills?
I'm getting mine at a local welding supply shop... Been a while since I get 3 filled at a time which stretches the time frame to about 1.5 years!! (one every 4-6 months)
I'll call & see where they r at...
B