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the pump is a circulating pump

theheating system i have is a gas boiler furnace, i am getting heat, the heat from the rads is equal top and bottom. the manufacturer is SA armstrong model 816019-002. thanks

i think you mean the rads? do i bleed all the rads in the house?

i have a gas boiler system. the pump is very noisy, it is rattling, grinding and vibrating off and on and up to 5-10 minutes continuously. does it need oil (on pump says to oil beginning of heat season) or is there air in the system? i just moved into this house and i have a few times turned...