HOW A FRENCH DRAIN WORKS

Hey good morning Chuck here with Apple drains today I'd like to show you an example of how perforated pipe with gravel works and another example of how it doesn't work when you come into a crawlspace or you might be digging up an old French drain and I'm going to show you why the holes point down in a French drain okay now we're going to simulate it with today's pipe and you can see there's holes on the one side of the pipe this is the perforation these holes points down we'll set that into the trench it rains water comes down through the gravel and floods up into your pipe and it will enter those holes which are on the bottom but those holes are pointing upward that water has to rise all the way up here before you can enter the hole okay before we go any farther let's take a look at an example of holes pointing upwards so to help you understand why we say holes point down in perforated pipe let's take a look at this video you can see we're in a crawl space and we're pulling up an old pipe let's go ahead and pause the video just for a second so you can see what's going on notice that the holes on this pipe are pointing upward and you can see the water just lays in the trench there is no way that the water can drop through those holes until it rises to that level so that's why we say holes point down then we put our holes pointing down and now we're going to cover it up with gravel now let's just simulate by putting our garden hose out here and see how long that water how long it takes for the water to get through the pipe through the gravel pretty good rainfall we're adding water to the gravel water goes down through the gravel to the bottom of the trench and will eventually begin to flow it flows through the gravel first because there are voids in the gravel but as we add more water directly and will start to flow through the pipe and that's why holes point down you can see the water coming through the holes plugs up from the bottom of the trench into the pipe and is carried away hey this is Chuck with Apple drains reminding you that if you believe you can do something I guarantee you can do it have a great day

Channel: Apple Drains

Views: 432,240

Rating: 4.7750344 out of 5

Keywords: French Drain, Gravel Drain, How To Install French Drain, Wet Yard, Crawl Space Drain, Foundation Drain, Sump Pump, Yard Drain, Holes Point Down, Apple Drains, www.appledrains.com

Id: eRL_5G9c08s

Length: 3min 48sec (228 seconds)

Published: Mon Aug 10 2015