others have suggested a 1/2 BSP tap, so perhaps that is sensible thankyou - even with a brass plumbers plug.
I just wondered what the water pressure retention was in comparison with silicone/epoxy/jbweld strength? Others had mentioned putting core plugs in with a touch of epoxy anyway.
I just wondered what the water pressure retention was in comparison with silicone/epoxy/jbweld strength? Others had mentioned putting core plugs in with a touch of epoxy anyway.