Downpipe repair

60BOWENS

Hi

I had a downpipe rain water diverter fitted for a water butt few years ago,which meant cutting the downpipe.

Now I have got a bigger and taller water butt which would mean the diverter (and cut in downpipe) needs to be higher.

My question is how do I repair the previous diverter site?

Once i cut the pipe higher and insert the same diverter,I could move the pipe downwards and thus  previously made  gap of 4 cm or so should be sorted.How do I make it water tight?

many thanks

WIAWSNB

If you look at DP unions/connectors, you'll see that they have a wider top which takes the upper DP, and a narrower bottom which fits inside the lower DP. 
That's all it needs to direct the water - it doesn't have to be sealed. 

victor2

Have a look at downpipe pipe sockets of the appropriate profile.

QrizB

I just wrapped some gaffer tape around mine. It's held for almost a decade now.

You could probably glue it if you were careful enough and cut everything square.