Shallow burial pipe suggestion for backwash hose

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Drdadr

Member
May 14, 2022
6
Michigan
Recently had some drain work in the yard and had an in ground drain placed for a downspout, which happens to be close to the pool filter (10-12 feet away, see photos). I’d like to run a pipe from the filter into this drain (will likely put one of those boxes that the downspout drains into and has cutouts for the outlet drain, and could probably have the filter pump drain come in there too). Thoughts on this? What kind of pipe? I’m in Michigan so freezing is an issue, I couldn’t slope it much or bury it deep so would probably just have to blow it out in the fall and have a flexible connector at the filter that could be removed in the fall?

Thanks in advance!

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When you say drain work, is that a weep? And when you say filter to drain, are you using it for backwashing or emptying the pool? How big of a pool? Weeps are not intended to take massive volumes of water if it is a weep. Another issue is that weeps becoming clogged and damaged or eroding because it's plastic. You won't visibly be able to see any issues with the pipe until you backwash or use this for example to empty your pool and the water is in your basement. IMO, you're taking a risk if my above thoughts are correct.
 
I am not sure what a weep is, but this is the standard type of non-permeable drain pipe that you see you running underground from downspouts. It goes down the slope just past the fence line. There is no basement, what do you see in the photo is an outbuilding which is on a concrete slab.
 
In my area, there are no underground downspouts, it's city by-law that all downs had to be disconnected from the city run so, if these are what you use to connect your gutters/eves into and into the sewer, then go nuts.

I personally wouldn't do it for pool waste due to the volume, consider installing a french drain. But you know your property better than anyone.

You can use anything to connect to this, you just have to make sure the pipe is inside your drainage pipe. So flex, PVC, ect...
 
SInce you are in a frost area, make sure the water in the backwasher line has someplace to go by being pitched to naturally drain or put holes in the pipe to allow water in it to drain out slowly when it's not backwashing. or remember to winterize it by blowing it out or prevent it from freezing with anti-freeze.

In most locations a drywell is required for backwash lines on new installs. I just backwash on my lawn and as long as i am not draining inches from my pool is absorbs into my lawn before making it to the neighbors.
 
Thanks for all the input. I tried it out today and it is working great handling the volume at 100% pump speed. This is very temporary. I will need to redo the white PVC elbow to rotate it 90 degrees and I plan to slightly slope a PVC into a catch basin like the one pictured which will drain the downspout as well, and route it into that big PVC.

Now that I think of it though, could a huge volume of rain force water back up toward the filter? Is there a one way valve option? Or maybe I should disconnect and cap the PVC connection in between discharges.
 

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