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Discussion Starter #1
Hello Guys. Im replacing my power flo circulator pump with a taco pump. Does anyone know the type of nut goes on the inside of the taco pump and holds on to the power supply? Im not sure if I explained it right but hopefully someone knows what im talking about. Thanks
 

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Discussion Starter #3
Oh yes. Thank you!!! One last question. Is there a standard size and if so do you know what size I will need? Thanks again
 

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It would normally be a 1/2" conduit locknut. They are available at all the big box stores.
 

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Discussion Starter #6
Im back with another question. lol. So i successfully replaced my circulator. I drained about a bucket full of water from the boiler in order to install but Im sure there was more to drain. After installation i opened up all the shut off valves, turned on the boiler, and it started to repressurize from 0 to 25 psi until it reached the set temperature of the thermostat and slowly dropped back down to 12 psi (normal pressure).

My question is that i didnt add water back to the boiler manually (just opened up the valves that where closed), how does the system get back to 12 psi (its normal value)?
 

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Should have an automatic fill valve, that should have been one of the valves you shut to change the circulator.
12 PSI is a hair on the low side for a hot boiler.
 

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Discussion Starter #8
Should have an automatic fill valve, that should have been one of the valves you shut to change the circulator.
12 PSI is a hair on the low side for a hot boiler.
Oh ok I see it. Whats a good range to set it to? I live in a 2 story house. How does the low pressure affect the heat?
 

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The law of physics would say you need another 4 psi for a 2 story house. With that, 15 psi would be a reasonable setting.
 
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