Drainage at bottom of downpipe is blocked

8 Sep 2005
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United Kingdom

We have 1930s semi with a bay window that suffering penetrating damp on the internal plaster. Today I noticed that the gutter was completely overflowing and found that the whole downpipe was full of water causing it to overflow onto the wall :(

Anway I have traced the plastic downpipe and can see that it connects to an original cast iron downpipe 2ft above the ground. When I disconnected the plastic downpipe and release all the blocked water I can see there is still alot of water trapped in the cast iron section that goes underground. Some questions:-

- Is there any technique to unblock this? I tried shoving a metail broom handle down there but It didn't give any. Looks like alot of moss has been washed down there...

- Where is the downpipe likely to lead? I checked the drains and I can't see any pipe that might connect to the foot of the downpipe. My neighbour speculated that the cast iron down may simply lead to under the front garden

Any thoughts appreciated

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Easy Fix.

Remove plastic downpipe and place your lance of your pressure washer into the cast iron downpipe, try and block the top edge with a rag. Then blast the downpipe, the dirt should be washer away. I've done this many times for customers.

if that doesn't fix it then you could try pouring a bottle of "one shot" down it that should do the trick.
Thanks. I got a pressure washer on the job last night. The stuff that came out didn't half honk! anyway we shall see. BTW what do you mean by "one shot"? Do you mean like a shot of whisky :LOL:
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I wouldn't fancy a dram of one shot it might be the last thing you ever drink

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