i have bought an s410k but when filling there is a leak from the adaptor. i have tried to fix the problem with an extra o ring but this hasnt worked. its the old style adaptor. what im finding is that the adaptor doesnt screw all the way in to the end of the hose so the washer/o ring isnt making a seal. before i added the extra o ring the cylindeer wouldnt fill but with it it fills but still leaks
any ideas on how to fix the problem?