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Continuing water hammer issues
I have a one pipe, oil fired steam system with two main loops ( 'front loop' with 5 rads and 'back loop' with 3 rads) in my 1926 home. 3 or 4 years ago the old steam boiler cracked inside, sending the steam up the chimney. Not knowing much about steam boilers at the time and trying to delay having to replace the boiler, I allowed my well intentioned dad to add some sort of radiator crack sealer to the system. Not sure if that caused or contributed to the following issues. The sealer not surprisingly didn't work so I had the boiler replaced with a Peerless. Since then, I have had loud water hammer and water squirting out of one radiator on the 'back loop' (this rad had been a bit noisy even before the old boiler died). This rad starts off sounding normal, slight hissing of air leaving when heating up, them we start to hear gurgling water and water hammer and the rad fills up with water until it squirts out the steam valve. Not sure if the sealant collected somewhere in the back loop piping, this rad or if something else is going on. I believe the system was skimmed and all piping was done correctly on the install, Hartford loop etc., can put up pics. I have checked the pitch of the problematic rad, pitch of the pipes in the basement, changed the steam vents on all rads, insulated all pipes, swapped out main vents from Ventrites to Gorton 2s, flushed rusty water from the boiler- pretty much everything I have read about here or in Dan Holohan's book. Is it possible that this pipe or rad might be partially blocked, keeping water from draining? Can you scope or roto-root the pipe? Would love to get system fixed and balanced so we don't wake up to loud banging every morning at 5. I mostly try to use our wood stove now to heat due to the noise and higher oil costs. Any suggestions or qualified steam contractors in the Worcester, Ma area? Thanks for help and suggestions!
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