Every once in a while with borrowed tanks I'll find one that none of my regs will seal on without a leak. I'll try Voit and USD and no deal. Yet those exact same regs seal fine on what appear to be an identical valve on other tanks. I've tried replacing the O-ring and cleaning out the groove, but no cigar. Tis a mystery. Mark.kworkman wrote:Has anyone else had issue with their first stage not sealing correctly at the valve?.
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