If you have leaky taps fitted with cork seals, try replacing with seals cut from those new high density foam corks you get on some wine bottles (Italian?). I did mine some 10 years ago and they have never leaked since.
Gerard the taps are listed as 1/4 BSP both ends. I can't imagine that both taps would have a duff thread at the outlet? Are you sure that the threads in your union nuts are not damaged/stretched? Can you try the tank end of your old taps in the union nut before you set too with a 1/4 BSP die. Ron
