Hi Nick,

The original pump in our boat was an Calpeda pump (M67270U). That one was leaking badly so I replaced it with a M67270J: https://penguinfrigo.co.uk/product/m67270-sea-water-pump-50-l-m-at-10m-head-ac-capacity-60000-btu/
That is the same pump but then specified for both 50 and 60Hz. The article numbers are from Veco/Climma. Calpeda calls the pump BCM-20A.

Cheers,

Arno