Drainpipe connectors

frogglet

We moved into an old house . There are two drainpipes at either end of a wall. One of the drains isn't draining properly.
  As a temporary measure we would like to put a bend connector at the end of the broken one and run a straight pipe along the wall into the other drain.
I've looked online but not a clue to what the right connectors are called.
Can anyone help?

Jeepers_Creepers

Are these gutter downpipes or actual below-ground drains? Any chance of a photo?

FreeBear

You'd probably want an offset bend plus a matching branch connector. Take your pick from https://www.screwfix.com/c/heating-plumbing/guttering/cat831536

If your guttering & downpipes are cast iron, the standard modern plastic fittings will be incompatible. In the long term, you would be much better off finding out why the downpipe isn't draining and fixing it. Quite likely there is a build up of debris (moss, roots, dead birds) blocking the underground drain pipe. Get a spade out and start digging. If the drain is connected to the foul sewer, there should be some rodding points and/or inspection chamber (manhole)  where you can gain access and attempt to rod out any blockage.

frogglet

Thanks for your replies. We aren't connected to any mains sewers. This is temporary as we are having a new sewage system installed and these drains will be excavated. They are plastic drainpipes as its on an extension. This one hasn't  been adequately provided for in terms of drainage.
It's a long story and we want to divert the water from this drain till we have the works done by an experienced person.

frogglet

A photo of the end of one drain. The other is identical. A sketch as well.

FreeBear

Looks like bog standard 68mm guttering. A couple of bends - https://www.screwfix.com/p/floplast-112-5-offset-bend-68mm-black/12213 a short length of pipe, and a few clips will do the job. No need to connect to the existing downpipe, just discharge straight in to the gully.

Jeepers_Creepers

Ah, so it's a downpipe? As FreeBear says.

Bear in mind that these fittings don't clip together but are a loose fit, so the new arrangement will need supporting and/or clipping to the wall to hold it in place. Ie, when you cut that other downpipe a bit up from ground level in order to get the elbow and side pipe on to it, don't be surprised if it comes away from the guttering above it unless you support it in place. 

Jeepers_Creepers

frogglet said:

A photo of the end of one drain. The other is identical. A sketch as well.

What is the distance between these two downpipes? How long is that length of gutter that seemingly joins them above? Why can't the LH downpipe cope with the total water flow? 

What's your ultimate solution going to be? Would replacing the gutter with 'deepflow' type and then simply removing the RH D/P do?