Quote:
Originally Posted by Daox
After a bit more thinking I think I'm going to go with the UP15-100F. I'll err on the cautious and cheaper side, especially since the gains for going to a larger pump really are quite minimal.
The one problem I'm having is finding the UP15-100F with the internal flow check valve. After looking at the grundfos spec sheet, I don't think I can actually get the pump with one, so I'll have to add that in as a separate item.
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List price difference is about $120. I don't know what price you would be paying for it. A good inline check valve is probably $40+ but since you have such a long lineset that is not going up to the roof, you might be able to do away with a check valve altogether. You can use a heat trap to prevent any unwanted fluid movement.
As much as i like the 3 speed 26-99, it is too high an amperage for the variable speed controllers where the 15-100 will work with the RESOL controller so it looks like it is a good fit.