On Fri, 15 Jun 2018 20:48:36 +0100, John Rumm
wrote:

snip

Anyone here been there and what did you do please?

I have an Earlex attachment that goes on a steam wallpaper stripper -
designed to shoot steam down drains through a 1/4" pipe. While the pipe
is blocked, it creates a fairly effective percussive action in the
water/gloop.

Neat.

Once clear enough to flow the hot steam tends to dissolve
much of what is left.

Yeah, that was my thought ... getting all the nooks and crannies
cleaned out and imagine a nice blast of watery stream would be pretty
effective (as it is on a real 'steam cleaner' etc).

I can't see what you describe on the Earlex site but I'm thinking I
might be able to attach a short length of some thinner silicone tube
to my wallpaper stripper hose to give similar results?

Cheers, T i m