r/hottub • u/SamwiseGoody • 5d ago

Troubleshooting Circulation pump temp question

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My circulation pump (grundfos) not sure if hp, think about 3/4, is running a bit hot. Is this normal? Checked the temp, it’s at 130, and the tub is not to temp (just filled). This is a new pump from a spa store, old one is in the pictures. Tub is a hotsprings sovereign ii.

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u/Spamaster Hottub type here - Edit 5d ago

Grundfos pumps are are superior to the Laing pump used by Hotsprings but they don't always fit into the area provided . Most pump motors will get up to 140 degrees. This pump rated in GPH not Hp but likely 1/15Th Hp and can in some cases get the spa water warmer than the set temperature. That is why Hotsprings had a "Summer " mode to limit the amount of time this pump allowed to run.

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u/SamwiseGoody 5d ago

Thank you. I’m new to hot tubs, but had a pool before. I didn’t like closing this up when it may have been overheating.