I am looking for a solution to drain my patio which is sloped toward one of its corners. The size of the patio is 15'x 35'and the area is Toronto (for rain volume estimation)
I would like to drain my patio using a floor drain (4" diameter) connected to a 4" pipe that will be drained to a dry well that will be ~12' away from the corner in question.
Here is the link to the drain http://www.homedepot.ca/product/abs-4floor-drain/981915
The "standard" solution would be to use to use a catch basin (9"x 9") which looks too large to me
http://www.homedepot.ca/product/9-x-9-inch-vortex-catch-basin-pit-complete-with-concave-grate/412421
Is my solution acceptable?
Edit: this is not a reffering to the load that this drain can take
Here is the setup, the drain will be hidden under a precast concrete slab that is the base for an offset umbrella
My this is the umbrella, attached with concrete anchors to the slab
Best Answer
edit: After reading your updated question, you will be fine installing the smaller drain. I have a large driveway drain that I installed a few months ago, and it works great to drain the huge puddle that used to form. I used a drain box similar to the 9x9 that you have, and 4" pipes. Occasionally, during a very heavy rain, it will get behind and not completely drain until the rain stops, but that is because the pipe itself is only 4"!
Great question! I am not an expert, but I would highly recommend the larger drain. The reason is, on a small drain, every time the drain gets stepped on (or driven over with a lawn mower), 100% of that weight gets put on your pipe underneath. A 4" pipe isn't designed to carry that weight, and could crack.
Even though the 9x9 drain won't necessarily drain any faster, it will have more surface area under it to support being stepped on, that way the soil under the drain, instead of the pipe supports the weight.