Ok... So I am wondering something.
on my EFM the 3/4" tapping that is shown in the manual for the pressure relief. Appears to have never been used. So I once again have a plug that is STUCK. like my return plug. It looks like someone tried to get it out at one time as the edge of the corner is already broken off.
Which brings me to my next question.
There is a 1/2" tapping near the front of the boiler, in front of the supply tapping.
Can I use this 1/2" tapping and bush UP to the 3/4" pressure relief valve? Will this matter? I'm guessing that is what the previous owner did. seeing how the plug appears to be pretty much locked in there.
so its use that 1/2" or take my hand at getting ANOTHER plug out. this one is in a much worse spot to get at easily...