Gutter downspouts leaking water in heavy rain.

Ectophile

If there's any slack in the pipework, you may be able to simply grab hold if the pipe and lift it up a bit.

Bendy_House

If the temp is mild, there's every chance you can gently prise the top connector out of the gutter outlet - gently push the gutter upwards, and pull the DP top connector down - you'll be surprised at the amount of 'give' or flex. (And not, hopefully, surprised by a creak and a crack.). If you can do this, then that top DP connector will lift off, as will all the dogleg under it.

Once out, the DP itself will slide upwards through the securing clips to allow you to get to the gulley cover. Slide the dp carefully - encourage it through the clips, and don't let the clips break.

Or, see if you can just slide the DP upwards a couple of inches max, against the dogleg which should have some flex, and again lift off the gulley cover. 

If this doesn't work, then it's often awkward to unscrew the actual gutter outlet, so you may prefer to unscrew the DP clips instead. Watch out for rusty screws that are seized and the heads might just wreck with the screwdriver.

Money_Grabber13579

Has the downpipe shifted out of position? On that second photo, the bracket for securing to the wall doesn’t seem to be attached to anything and there looks to be a rawl plug into which it might have once been screwed several inches away.

jimpwarsop

Remove anything holding the downpipe to the wall.

At the top, where you have a couple of 120 degree bends, ease them apart and remove the downpipe and investigate the soakaway entrance. Its probably/possibly full of "crap" from your roof/gutter, a mixture of leaf mould and moss, indeed it might look like compost.

Cleanout the down pipe, dig as much out of the soakaway entrance as possible, and rebuild the system, then fit something over the guttering outflow to stop any more moss/leaves/greneral crap entering the soakaway.

I used a scrunched up ball of chicken wire, of course there are specialist items available on the market, whatever you use it will need maintaining.

"IF" your soakaway was properly installed that should do it.

Eldi_Dos

It may be worth considering getting the downpipe adjusted so that you can clear out any debris in the future without climbing ladders or calling in a company.

Phil3822

Thanks everyone, the weather is due to be reasonable tomorrow and I have time to tackle this so will give it a go. I will report back and take pictures of what I find. You have all been very helpful. 

Eldi_Dos said:

It may be worth considering getting the downpipe adjusted so that you can clear out any debris in the future without climbing ladders or calling in a company.

How would I do that to make it easier? Thanks. 

Bendy_House

Good chance you'll get away with it as it is.

Gently-but-firmly ease the DP upwards, and you'll likely find that the dogleg at the top will accept a lot of movement. It only has to raise around 2" before the gulley cover is accessible, I think?

Watch out for the DP clips - the DP might be a snug fit in them, and try to 'fold' them backwards, so make sure you ease the clips downwards as you 'up' the DP.

kdotdotdotdot

Bendy_House said:

But it may be that the whole soakaway is simply full of carp, and that's a bigger job.

Or salmon perhaps, if they're in Scotland?

Eldi_Dos

kdotdotdotdot said:

Bendy_House said:

But it may be that the whole soakaway is simply full of carp, and that's a bigger job.

Or salmon perhaps, if they're in Scotland?

That would add to the gravlax of the situation.

Eldi_Dos

Phil3822 said:

Thanks everyone, the weather is due to be reasonable tomorrow and I have time to tackle this so will give it a go. I will report back and take pictures of what I find. You have all been very helpful. 

Eldi_Dos said:

It may be worth considering getting the downpipe adjusted so that you can clear out any debris in the future without climbing ladders or calling in a company.

How would I do that to make it easier? Thanks. 

One improvement that could be made once drain has been cleared out is fitting a leaf catcher filter between drain and downpipe.