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Old 08-28-2018, 02:11 PM   #1
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Best way to deal w/ these downspout drains?


Hey All,

We just did some hardscaping and now trying to figure out the best way to address the gutter downspouts. I have a double and a single all flowing into 4" pipes (3 total) in two different locations. My back yard is more or less level until a large slope about 25 feet from the house. I am in southern CT so cold winters are indeed an issue.

Location 1 is the double. Right now they exit under a large patio and close to the area where a garden will go. The grade is flat on this side so if I wanted to daylight the pipes it would have to be at the slope, which is a) far away and b) path is filled with big tree roots.

Location 2 is the single. This part of the yard slopes a little so I could in theory daylight the pipe somewhere in the middle of the yard, but that would look a little silly.

I have a few ideas:

- Dig gravel pits and french drain down into them (solid pipe w/ holes wrapped with geotextile)
- Put a popup emitter somewhere downstream, or maybe just on the garden side (even though it would be green in a sea of dirt lol... can't they make different colors? If I do this I'd dig down and lay a bed of gravel.
- dig all the way to the slope as best as I can and daylight them all there
- Some combination of all of the above

Of course the dream is to be able to away w/ the cheapest and easiest solution that looks the best and avoids destroying all of our hardscaping work, but I also live in the real world :p I've attached some pics to illustrate what I'm dealing with, and I know ideas for drainage vary quite a bit, so I'm open to and appreciative of any ideas!

Thx!
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Best way to deal w/ these downspout drains?-20180828_130138.jpg   Best way to deal w/ these downspout drains?-20180828_130213.jpg   Best way to deal w/ these downspout drains?-20180828_130033.jpg   Best way to deal w/ these downspout drains?-20180828_130006.jpg   Best way to deal w/ these downspout drains?-20180828_130021.jpg  

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Old 08-28-2018, 09:00 PM   #2
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Re: Best way to deal w/ these downspout drains?


Maybe I'm a glutton for punishment and a little more work but I would definitely run them to daylight. I dropped off me elevation you were present at to at least 18" deep to minimize the chance of freezing in the winter. I would definitely combine the 2 that are side-by-side into a single pipe before doing this.

The pop-ups only work if you have a decent amount of slope in the pipe going to them so you have sufficient head pressure to make them open, otherwise a significant amount of water will stay inside of the pipe and potentially freeze in the winter.

A rock filled dry well will also work but is probably going to be just as much work if not more than running the pipes to daylight.
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Old 08-28-2018, 09:12 PM   #3
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Re: Best way to deal w/ these downspout drains?


I would fashion some sort of sump right there to catch the water height and run the pipe out the bottom a 5 gallon pale with a grate on top works.
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Old 08-29-2018, 09:35 PM   #4
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Re: Best way to deal w/ these downspout drains?


Welp I figured I'd just bite the bullet and start running those doubles straight out to the hill. Unfortunately (and more or less as expected) the tree had other ideas. There is pretty much zero chance of getting a straight shot anywhere near that thing. The only choices are to double-45 around to the side (and there is no guarantee I'll pick the right spot) or just go the french drain route and dig down as far as I possibly can. At least with the double I'll only be flooding a garden in the worst case, though roots sure aren't going to help.
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