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Old 02-28-2020, 10:51 PM   #1
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Nut in Taco Circulator


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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Old 02-29-2020, 06:35 AM   #2
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Re: Nut in Taco Circulator


Ayuh,.... Just a stamped steel conduit fitting nut,.....
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Old 02-29-2020, 08:43 AM   #3
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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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Old 02-29-2020, 10:46 AM   #4
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Re: Nut in Taco Circulator


It would normally be a 1/2" conduit locknut. They are available at all the big box stores.
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Old 02-29-2020, 11:03 AM   #5
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Thanks guys
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Old 03-01-2020, 08:50 PM   #6
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Re: Nut in Taco Circulator


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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Old 03-01-2020, 09:09 PM   #7
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Re: Nut in Taco Circulator


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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Old 03-01-2020, 10:41 PM   #8
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Re: Nut in Taco Circulator


Quote:
Originally Posted by roughneck View Post
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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Old 03-01-2020, 11:23 PM   #9
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Re: Nut in Taco Circulator


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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Old 03-02-2020, 12:09 AM   #10
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Gotcha. Thx
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