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Placement of expansion tank/feed water/air separator

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I am retrofitting a Triangle Tube Solo with a Caleffi hydro separator into a an existing install.



Would it be ok to place the make up water/expansion tank/Spirovent on the out put side of the boiler on the IDHW side prior to the IDHW circulator pump? 



Physically I am not working with a lot of space and it sure would fit better...
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