In article snipped-for-privacy@posting.google.com>, NickW snipped-for-privacy@bt.com writes
I have a fairly beefy Kaarcher with the drain-jetting hose attachment. I'm very glad I got the 'long' version (around 75ft.), as I've need to use it's entire length on a couple of occasions. It's done a brilliant job on our salt-glazed (clay pipe) drains (slowly getting replaced with plastic).
I also had a cast-iron downpipe concreted into a gully trap. Both were solid with grit, moss and other crud off the roof, to a depth of 2' up the pipe (tried to rod it, which is why I know). The drain-jetting 'bullet' cleared this completely after about 20 mins of soggy poking about.
So I'd heartily recommend them from my own experience, BUT clay land drains are notorious for cracking and collapsing, and becoming conduits for tree roots (in search of the water). If the drain is intact, a pressure jetter might well clear it. but if it's collapsed, you'll have to dig it out and repair it. It's annoying that the hose can't be extended (it goes straight into the "gun" of the jetwash) - I have an extension pipe for the jetwash itself, but that's no use in this context. The 'pro' versions have much longer pipes, so hiring one might be a better option.
Regards,
Simonm.