How to stop pooling from a single downpipe?

i_hate_sanding

For some reason rainwater from the entire roof, roughly 12m x 7m, is being funneled into a single downpipe at one corner of the house. The previous owner blocked off another downpipe on the same side near the pool filter and redirected everything to this one point.

The current downpipe is round PVC, which seems to be shoved over an old rectangular metal pipe that’s still in the ground. I can poke at it with a screwdriver but can’t see inside properly. Water pools badly in heavy rain. What's the best option to rectify this?

I was considering cutting the PVC pipe and pulling out the metal pipe. Then hopefully finding something to join the cut PVC pipe back together and maybe sealing it into the ground. What should I be looking for when rejoining and sealing into the ground? Should I cut high or low?Is there a better option?

I assume a hacksaw will do the trick. We've had a bit of rain recently which exasperated the issue but even during regular rain water trickles out the side, runs off onto the title and against the house.

EricL

Hello @i_hate_sanding 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your downpipe.

It appears that the former owner did not connect the downpipe outlet to the stormwater drain properly. Linking the downpipe to the stormwater drain is possible and using a Holman 100 x 80 x 90mm PVC Stormwater Downpipe Adaptor might work. However, I don't recommend puling the pipe out of the ground in order to link it to the downpipe. If the pipe is loose, it's an indicator that the storm water pipe has been compromised and water is travelling through the soil instead of the pipe. 

This situation can cause underground soil erosion to occur which can compromise the cement base you have on the surface. In order to repair the drain properly the stormwater drain must be inspected to see if it is still intact, this will require the services of a plumber that also provides a pipe inspection service. Linking it blindly will cause unpredictable damage to the underground structure of the area. 

Once the inspection has been carried out and an extension is all you need to connect properly the plumber can do this step for you. While the plumber is at your location it would a be a good opportunity to ask them about the blocked sections and if it's possible to re-use them and have them drain properly into the stormwater drain. This will remove all the pressure from that single drain point on your gutter system.

If you have any other questions we can help with, please let us know.

Eric