"Vortex" wrote in message
...

Actually I was thinking of the Fernox Gel so the capacity is a non issue
really.

Cheaper to buy a cheap pump-spray (Hozelok garden sprayer type) and
bog-standard liquid Fernox and use the sprayer to squirt the liguid in
through the filling loop connection point (with suitable adaptation to
sprayer to get it to 15mm or 1/2" BSP)