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Switch from Air Scoop to Spirovent
I have a hydronic heating system that uses a gas converted combi-boiler. It is not piped for pumping away (was going to do it this summer but never got around to it so its on the agenda for next summer). I currently have an air scoop with only 6 inches or so of straight pipe (rather than the normal 18) so I am in a never ending cycle of purging air then the air introduced with the city water never gets eliminated by air scoop/aav. So eventually it sounds like a river and I purge again and start over.
To remediate this until I can re-pipe for pumping away I want to replace the air scoop with a spirovent. My question is what is the best way to remove the air scoop as it is threaded in place. A picture of the setup is shown. I presume I have to remove the tank etc first but not sure.