How to install submersible pump for driveway runoff?

[Jess1988]

Recently bought a house, the driveway slopes to the garage as does the lawn which sits above driveway level. As the water pools closer to left-hand side of garage doors on the grass it slowly pushes right as it builds up it's causing flooding under my house in the garage and when high enough seeps under skirting into my granny flat.

I want to put a submersible pump and pit in to collect it and have a pipe put in to take it to the road. After suggestion for a pump and pit I can purchase and have someone install. 

Thankyou. 

[EricL]

Hello @Jess1988 

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

Your general idea of installing a pit and placing the pump in it is a very sound idea. But in order for us to give you more advice, would it be possible for you to post a few photos of the area where the water converges and how it floods down to your granny flat. Once we understand how the water flows, we'll be able to offer recommendations.

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

Eric

[Jess1988]

 so the water flows to that   coner near grass and garage it build and pushes right flooding under the garage doors. I had a garage company come out and they told me that there was nothing that they could install that would help that I would also need a pit and pump. Anything over 15/20ml of rain builds fast and floods to that corner. As you can see sort of the driveway slopes down wards and not towards road

[JacobZ]

Hi @Jess1988,

To me, it looks like the logical thing to do is have a channel drain installed across the front of the garage door to capture the water flowing towards it and send it to that low corner, where you could install a drainage pit.

This would involve cutting the concrete with a demolition saw to allow the channel drain to be installed flush with the top of the concrete.

Once the channel and pit are in place, you would need a plumber to run a pipe up to the road from the pit and install a sump pump. It would be best to have a chat with your plumber before selecting a pump, as it would need to be strong enough to handle the volume of water and the angle of the slope.

I'd suggest getting a plumber or two out to quote on the job and have a discussion with them about suitable products before you purchase any materials.

Let me know if you have any further questions.

Jacob

[Jess1988]

Sorry for the late as reply. Thankyou. That's what are thought is too  

[EricL]

Hi @Jess1988 

That's excellent recommendations from @JacobZ. Just to add to the suggestions made, I propose using the largest pit so that you have a lot of space for the pump and the float switch will not get caught on anything. 

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

Eric