A rather inelegant title for a cool technology addition to Frank.

Isotherm have a range of freezer/fridge solutions that can turn a coolbox into a freezer or fridge. The SP (Self Pumping) range appeals to me because there is no need for a pump, thus reducing power consumption at sea.
The system works by replacing the existing, through-hull sink drain cock with a larger (2.5″) unit inside which is embedded a coolant coil. The under-water exterior surface of this unit uses sea water to cool the refrigerant via the coil, which is wrapped around the drain out-pipe. 

This picture is worth a thousand words:

The unit I will install is the SP 2051 with an “o”-shaped cooling panel:

The sacrificial anode was not in the box – I shall get one, make sure I have all the components and then have the assembly fitted when Frank is hauled for her annual scrub and antifoul at Ingleside.

I can install the compressor later, or maybe have the yard do it.