Not quite. Electric motors used on pond pumps vary from the 60s% on low end ones to slightly over 90% efficiency on the motor itself . Pond pump designs also vary per head range. Often pumps are designed not for max performance but for maximum ease of manufacturing and maximum profits. Available manufacturing machinery, labor and materials playing a big part.
It's a racket with most manufactures embellishing posted performance. Often choices are made on the mfg lying the most. The only pond pump specifications I trust are the Flow Friend pumps adhering to EU pump performance standards.
Through the years every pond owner that correctly installed a quality flow meter got less flow than their estimate (embellished guess).
Last edited by batman; 05-04-2021 at 08:42 PM.
The real Batman wears polyester! Don't be fooled by the plastic imposter.