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What is this goo inside my oil burning HW heater?
Please take a look at the attached photo of the flue on my 10 year old Bock 32e oil fired water heater. In addition to the soot, there seem to be these balls of goo - what are they? Where are they from?
2001 Weil McLain SGO-3 Steam Boiler/Beckett AFG oil burner. Vaporstat running at 1.0psi max. Single-pipe, counterflow system (w/near-boiler drips) connected to 8 radiators heating 1400sq/ft (2 stories) in Central NJ, built in 1915. Bock 32e Oil-Fired H/W heater w/Wayne burner. Lots to do and getting there slowly.
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