Fettlin’ Day! October 29, 2023

Colin aboard Frank.

Frank used to have a 12volt fridge, which also ran off mains when alongside.

I mentioned (https://wordpress.com/post/frank-justfrank.com/306 October 2015) the fridge, which I extracted from its hole by the engine : “Most useless kit: the refrigerator. I donated this to a charity in Dartmouth. Every time I had a problem with the electrics or engine I had to haul it out of its home.”

So ever since I have had this hole, having converted the icebox to be a fridge:

The gaping hole where the fridge lived.

I am going to finally turn it into a storage cupboard. I’ll leave access to the engine water inlet. There is a separate access door under this pic.

Isotherm water-cooled refrigerator upgrade to coolbox 

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 drainpipe cock is attached to the assembly.

The under-water face of the self pumping cock. An anode fits to the face.


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.