VC20

Hello I am looking for a reliable plumber to perform a sprinkler flow test.
My previous plumber installed a 200 psi Gauge that was not working during the inspection and I need to reschedule one woth fdny.
However I would like someone to come and install a new Gauge and discuss about sprinkler/boiler /backflow and other yearly test and inspection.
Someone reliable who is not trying to upsell especially since I have been involved in the gut rennovation of my building and know how my system works
Thank you