Great video. On a run of these at the moment. Looks easier on the CDi than it is on junior/Si. Tried various methods, found it easiest to take entire hydraulic block out. (On Si & Junior)

Yet another tope of the drawer tutorial, many thanks GN :-)

Done three of these so far, the by pass pipe is a pig to get apart, last one I did had to remove the return manifold as well and pull it apart outside the boiler, I’ve never removed the gas pipe though, there’s enough room without having to.

Please Can you make a video on how to clean a circular heat cell.

Look very easy when watching but I done one last week not an easy job.

Hi Geoffrey did you do one on removing the si or jr RTN block

Hi . Is it worth fitting an arrestor unit to decrease the pressure on the plastic parts?

Hi mate, I’m a second year apprentice, 17, just wondering why you plugged the pump bybass

These are horrible plastic units. From having hairline cracks to having holes but the are easy to work on.