installing a dry well for the roof drain
I got a bucket that is really a sump pump liner and cut a bunch of holes in it. I intend to bury it in the ground about 6 to 9 inches below the surface and run a 4″ PVC pipe into the side of the it from my roof drain. There will be a few inches of stone under it and 6″ to 9″ around the sides. I have a piece of filter fabric to place around the stone and over the top of the whole thing. Some one said the fabric should be around the bucket but I feel it should be around the stone. The holes in the bucket are to small to let the stones in. I want to keep the dirt from mixing with the stone. And, aside from the fabric, does this seem like the right way to do this?
BTW. The soil here is very porous. A 2 gal bucket of water dumped into a hole disappears in 30 seconds.
Replies
Greetings Joe,
This post, in response to your question, will bump the thread through the 'recent discussion' listing again.
Perhaps it will catch someones attention that can help you with advice.
Cheers
Edited 3/9/2005 3:13 pm ET by the razzman
That's what some here call chin scratch engineering.
I have no idea of the surface area you are draining, as in the size of your roof.
Nor what type of climate you live in as in where is the house?
That said, it seems as though you have good perk.
Last time I did this, on a 30x45 hip roof hoouse, I was reguired to install 2 x 450gal drywells with I cant remember how much gravel under and around, and this was in bankrun soil.
Go figure.
I'm sure others may have a better answer.
Eric
I Love A Hand That Meets My Own,
With A Hold That Causes Some Sensation.
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Hi Joe, my first post here so bear with me. I put in drywells when we moved into our new house. Did some engineering and figured what I'd need to catch a 1" rainfall but quickly realized I couldn't possibly store that much water. Then I seat-o-the-pants designed it and it will hold about 1/4-1/2 inch. That takes care of most of our rains. Overflows take care of the rest. For me, the important aspect was getting the water away from the house.
I used Infiltrator brand molded septic field sections. Half drum shapes that get buried open side down. They snap together and I used 1, 2 and 3 together for the various drains. 10 total for something like 750 gallons of underground reservoir. The 4" PVC goes in the end and a 4" PVC overflow comes out the top with a nice little plastic grate to keep the critters out. I've been very happy with it all and it was a breeze to install (my first project after acquiring my little backhoe).
You're on the right track with your sump pit, but way short of reservoir capacity unless your house is quite small.
Rob
Weekend Warrier Supreme