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Clean the "flue" inside the heater?
I have a 12 year old Bock 32E with a more than 25 year old Bock M-SR burner. The burner has been serviced annually by the fuel oil company. I've replaced the anodes twice, and drain off sediment monthly.
When the tech does my steam boiler, he removes plates and cleans the inside of it. However, no one has ever removed the flue from the water heater, run a brush down it, and vacuumed out the soot.
Does anyone actually do that? Is it even physically possible with the metal spikes in there? Should it be brushed to prevent "no hot water" and maybe even a puff back?
Thanks. I'm a fan of preventative maintenance and as-efficient-as-possible operation.
One pipe steam, 1970's Columbia COU700 boiler (188K btuh & 785 sq.ft. steam), Beckett RF with 2.00 80A nozzle, Pressuretrol cut in 0.5 with 2.0 diff, 3 mains (two are vented with Gorton #2, third has no vent!), pipes mostly insulated, 32 radiators.
Bock 32E water heater, Bock M-SR burner with .75 80A nozzle.