On 15/07/15 13:18, Etaoin Shrdlu wrote:

Missus's dad, who (before he got too old) was what I think they used to
call a jobber, told us to throw a bucket of water down each drain. I
found one collapsed gulley that way about 20 years ago, and got a small
price reduction. Although it did cause me a day's work, too.


Good idea.

When I replaced my gutters, I found none of the drains worked. They were
OK in light rain and in heavy rain there was so much water running
around it was hard to see them overflowing (it just backed out the pipe
at ground level and ran along the concrete with the rest of the water.

I bought a USB camera on a 5m cable and did a DIY survey. Rebuilt 2
working drains and engineered the guttering to only need those two.