DIY & Home Improvement

Did those plumbers or the last one you had do the repair tell you anything about what is happening ? I'm guessing the problem reoccurs at fittings that are worn of have come loose over time. Ok so pressure and worn fittings. I'm not a plumber ,I am a retired general contractor experience in all phases of construction. What in the form of a consult did the plumber/plumbers give you regards to the problem moving down the pipes ? And the condition of the fittings ? How old is the duplex ? For a plumber this about chasing leaks. And was a pressure test done ? OK so, were the leaks you had repaired at the fittings or in the pipes ? By your description it seems to come down to old or worn fittings bad welds on and so on.Can you see those fittings at the hub ?

You need a good plumbing trouble shooter to come out to your place .