ID help & age

Had a home with hot water heat this weekend. The unit simply had GRUNDFOS and “number” A8318. It said it was type UP26-64F. Can anyone help with age on this unit? Thank you. I’m putting a photo on as well.

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The circulator is certainly a Grundfos. You say the heating unit said Grundfos as well? Reason I ask, is because all your numbers are for a Grundfos 1/12 horsepower universal pump. :slight_smile:

Thanks…let me look at my notes again.
It was a LONG day yesterday.

That is an A O Smith Burkay Copper Coil Gas boiler.

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{edit} Sorry, I guess you were asking about the pump, not the boiler.