Garage Floor Catch Basin Question

[danetj862]

Hi everyone,

So I had a 32x32 garage built this Spring and am getting around to pouring the floor. When I was installing the underground electric, I figured I would install two = 4" sch.35 pipes (one drain for each bay in garage) to compact the base vs disturbing the base right before pouring.

Pipes are left to daylight outside garage and the other end currently has 90* fittings with a scrap piece vertical capped off. My question is, would I be better off installing a 90* long sweep from the side outlet of the catch basin, to a vertical pipe, which then connects into the existing 90* elbow to the horizontal drain pipe? Or should I drill out the bottom and use an adapter to connect vertical pipe to existing 90*?


The reason the elevation of the drainage pipes are low is so they come out of my building at existing lawn grade. (Garage eleva. is about 20" +/- from lawn grade.)
Catch basins / floor drains are only there for snow melt, not be washing cars inside.

Thank you!

 

[jack stand]

Just for snow melt, do you really need a basin? A regular floor surface drain should help with your elevation situation.
I'm not an experienced plumber but am wondering how slow moving "drippage" that might be carrying sand and grit might benefit from increased pitch. Then I can argue against myself that these will be left on the garage floor resulting in pretty much just water.
How's that for a circular non answer.

 

[danetj862]

Just for snow melt, do you really need a basin? A regular floor surface drain should help with your elevation situation.
I'm not an experienced plumber but am wondering how slow moving "drippage" that might be carrying sand and grit might benefit from increased pitch. Then I can argue against myself that these will be left on the garage floor resulting in pretty much just water.
How's that for a circular non answer.

Hi Jack, If I did not have a catch basin, all snow would melt leaving water on top of my floor, which is a hassle I do not want to deal with. Not sure what you mean by regular surface drain? Maybe a trench drain is what you are speaking of? I didn't want a trench drain since they are generally 4' linear x 4-5" wide, a 12x12" grate is small enough that when working on equipment I wont be working over the linear drain grate (& dropping tools / parts)
Either way, My question is not to increase the slope, It is how to take my elevation from the horizontal pipe & connect to the higher elevation of the side outlet on catch basin.

 

[jack stand]

Floor drain that can have a 90 directly below the slab.
If your catch basin one of the plastic types I'd think that drilling a hole in the side and sealing it wouldn't be terrible difficult and there's probably a fitting just for this. A "bulkhead" fitting is what comes to mind but I'm not sure if this is a plumbing term. I know of it with hydraulic type fittings.