Replacing a non vessel old school expansion tank


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Old 12-14-19, 08:22 AM
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Replacing a non vessel old school expansion tank

Hi everyone I'm planing on replacing my old school non vessel/bladder expansion tank for a newer kind, my question is: Do I install it on the same place where the old one is, on the supply side of the boiler or do I install it on the return side of the boiler?
 
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Old 12-14-19, 10:56 AM
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The short answer is the expansion tank can be installed anywhere on the system as long as there are no restrictions between the boiler and the tank.

Pics would be helpful of the current tank location to see exactly what you have.

Hope this helps a little.
 
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Old 12-15-19, 07:02 AM
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If at all practical, the ideal location for the expansion tank would be on the supply side of the boiler before the pump; however, that assumes that the pump is already on the supply side (which I would guess is not the case since it sounds like you have an older system which were often piped with the pump on the return piping).

See for example: https://heatinghelp.com/systems-help...g-away-piping/

Like spott indicated, pictures of the current near-boiler piping would be helpful.
 
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Old 12-15-19, 07:34 AM
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When the bladders go on tanks they fill with water and are very heavy.

Locate tank is where it is accessible and piping can support extra weight.

Also put a ½ “ NPT shut off valve on tank to make removal or depressurization of system easier.
 
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Old 12-15-19, 12:12 PM
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Old 12-15-19, 12:15 PM
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ok thanks...I posted two pics.
 
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Old 12-15-19, 02:22 PM
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yeah I'll do that, thanks.
 
 

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