Johnson & Starley J25-32 Query?

The water heating section (right hand side) is a Janus 3 circulator.
It is completely non-electric (unless it has been modified), so if the pilot light is alight and established, just turn up the knob on the front of the valve (above the pilot control buttons) to maximum and the circulator main flame should appear. If it doesn't (and there is no heat in the flow pipe), the valve will need changing.

Carefree
July 2010