"spool"?? what's that?
1. VS motors are expensive and have reliability problems. 2-speed pumps are somewhat less efficient, and harder to install correctly, but are MUCH more reliable.
2. See above.
3. Depends on your pump. Post *EXACT* pump *AND* motor models. Numbers/data on electric motor are usually for the motor only; pump models are usually on the wet-end or pump body.
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