Downspout Drainage System - Avoid This Mistake

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I see this advertisement all the time. I see these diagrams all the time for ways to filter out the leaves and catch the water. So I want to explain to you why this is not a good idea. Why we do not practice this type of installation.

So what ends up happening, you end up splashing. You can see how wet the foundation of that house is in that picture. There's so much splash when you do this. So you have a downspout and it doesn't matter how you set it up, you're hitting this great water splashing everywhere. So, you're not accomplishing what you want. And that's to capture all the water, keep it contained, and take it to a location at discharge.

So then they offer this, it's ramped and it's supposed to be angled so that there's not as much blush on the house. Still a bad idea. And I'll tell you why. When the waterfalls and you pick up speed and you pick up your velocity, your downspout system is a gravity-powered system. Hydrodynamics is fluids in motion. So why do we want it to slam into this catch basin and stop? All that momentum. All that push guys want to talk about push -- how you flush the debris through the pipe. Well, don't do this for one because the water just comes to a stop. And how in the world is this going to catch debris because guys will cut this and then they'll put the pipe inside and say, well now it's not splashing. Well, now you don't have continuous flow. You lost all your pounds per square inch because the water comes through here with such force, when it's coming down a continuous pipe the way we run it, you end up with good velocity, good pounds per square inch. You're pushing to debris. You can force this out through either a pop-up or if you want a basin. I use both, depends on the application.

Now I watch what you guys are doing on youtube and I can explain what some of this is about. All right, so I didn't have a 90 because I wasn't going to go run and buy parts for the video. This is a, a clean out T, you know, sweeper. It serves the purpose. Now to get this is. This happens to be scheduled 40, but any PVC pipe for this demonstration will do. So you got your SDR pipe now to slope it. So you go ahead and you raise this to get a slope. Well, watch what happens. So you're up against your house, you go to slope it and you got this pipe that's away from the house. It looks nasty. So what do the guys do? Well, he cuts the lid so that he can put this pipe through the lid. Now he can cut, he can cut a bigger hole in the side here or even use that and that pipe now can bend on a slope. So he's using this because it's, it's giving him the ability to get the slope he's after out of a hard pipe.  And then he can keep it tight to the house. But here's the problem. The water comes down this pipe and it crashes into the space and you're not catching any debris. There's so much turbulence and you've lost all your velocity and the PSI drops drastically. [...]

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French Drain Man – Michigan’s Yard Water Drainage Experts. Masters in the art of constructing contained French drain systems & curtain drain systems that and fix your yard drainage problems for years to come. Over 30 years’ experience in solving yard water drainage problems in Oakland, Macomb, Lapeer and St. Clair Counties.

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