On Fri, 20 Nov 2009 09:52:54 -0800 (PST), "tom.harrigan"
wrote:

My tank takes 3/4" BSPM fittings, but they keep leaking (testing with
air). The trouble is, the fittings don't screw all the way in, so I
basically have to pack them out with loads of PTFE tape to get a seal,
which I'm not happy about. Perhaps that's the way the pros bodge it?


I think you'll find that plumbers use Boss White or similar sealing
compound reinforced with hemp fibres.