Regrading and installing AGI Pipe - What type of backfill to use to regrade and divert water away?

[Floyd25]

Hello Everyone,

We are planning to add decorative stones to our empty lawn that is currently crushed rocks. No budget for concrete.

Unfortunately, the slope of the ground moves towards the house and on the left is flat. 

1. Is it better to regrade the slope first before installing drainage? Or do we regrade to where we are planning to add drainage?  I understand the first priority is to try to move water away from the house then add needed drainage.

2. What type of back fill/base is best to use to help with the water run off/ away from the house? It will be topped with decorative stones. 

3 As my available storm water discharge is not deep enough to accommodate 100mm agi required trench depth of 300mm. 

Will multiple 65mm agi do the job? 

4. What is the recommended distance of french/agi drain from the house foundation? 

Here are some photos for reference. 

Low area at the bottom right of the pic

4 PONDING AREA

Crushed rocks? 

GROUND CLOSE -UP

Plan

 

Thank you so much in advance! 

Floyd

[EricL]

Hi @Floyd25 

Yes, you can install your pipe higher in order for the pit to work properly. Just keep in mind that the lowest pipe attached to the pit will be the one where all the water will flow to. Please note that you'll need the services of a plumber if you are attaching your drain to the storm water drain of your house for safety and compliance. 

If you need further assistance, please let us know.

Eric

[Floyd25]

Thanks @EricL 

Regards,

Floyd

[Floyd25]

Hi @EricL @MitchellMc

Need additional options or advice on what can I do to discharge excess ground water from the french drains. 

My other option at the moment is my backyard as the storm drain for surface water may not be low enough for the agi pipes.

Our plumber neighbor recommended to use the back as discharge if there are no other options. 

I have read about rain gardens.. not sure if it's going to be enough. 

Here's a site photo for reference.. 

Thank you. 

Floyd

[EricL]

Hello @Floyd25 

In this particular instance, I suggest engaging the services of a licensed plumber. There are great deal of rules and regulations in regards to diverting and redirecting water on your property. It must be done in accordance with the rules and regulations of your local council and can only be carried out by a licensed plumber for safety and compliance. My best advice is to discuss your plans with the plumber and see if they will make any amendments to it. Once you and the plumber are in agreement, your water diversion plan can then be put into action. 

If you need further assistance, please let us know.

Eric

[Floyd25]

Got it, thank you.

Kind Regards,

Floyd