About 6 weeks ago I had to replace an old compression joint on my hot water pipe (from a combi boiler), the pipe one side is 3/4 in and 22mm the other, managed using a 3/4 olive on a standard 22mm compression fitting to join them and appeared to be sealed, did use some ls-x jointing sealant as well as found it difficult to get a good conenction on the 3/4 in side. However 6 weeks later has started to weep from the 3/4 side. Should I just tighten the nut onto the compression joint a bit, to see if this will solve the problem, or do I hve to go back to square one and fit a new olive etc. Loathe to do anything that will make it worse. Pipework is in an awkward position hidden in a cavity. Your expert comments would be appreciated. have normally found that once joint is sealed it stays sealed so not sure why it has started to weep after this time