And others say not to use any at all . Filters need servicing, changing or cleaning. I would guess that is not in the plan. Cleaning the pot from time to time might be a better plan.
And others say not to use any at all . Filters need servicing, changing or cleaning. I would guess that is not in the plan. Cleaning the pot from time to time might be a better plan.I am about to start digging a hole for my sump basin. I plan on drilling some 1/4" holes all around the basin and use "River Pebbles" from Home Depot for 6" under the basin and 6" all the way around the basin.
However I have heard many say filter / landscape cloth should be used. I already have quite a bit of it and was planning on using it. But it seems many say the cloth should line the pit, then the stone, then the basin (so ground water flows from dirt, through fabric, through rock, then into basin). But other say to wrap the basin with the cloth and put it in the pit then pour in the gravel. (ground water flows from dirt, through rock, through fabric, then into basin).
Which method is best? Having the fabric between the dirt and rock sounds good because it would keep any silt from getting into the rock. Having it wrapped around the basin seems easier and keeps anything (including smaller rocks) from getting into the basin, but I think it would be possible for silt to clog the fabric over time and prevent water from getting in the basin.
This is a WRONG blanket statement and illogical. Studies have been done on the clogging of drainage geotextiles, and as long as you are using the proper type for your use, the performance of it remains intact.Wrapping the basin and/or the perimeter drain pipes with the cloth is the worst way to do it. The cloth will cling to the outside of the basin and/or pipes and only the 1/2 or inch circles worth of cloth directly over the holes will filter the water and clog very quickly, blocking all collection of water shortly thereafter.
thanks. I have seen polypropylene landscape fabric, but I have not come across any that claims to be "non woven" or "needlepunched". Where do you buy something like that? So you recommend "3/4 angular". Is that the same thing as crushed stone?This is a WRONG blanket statement and illogical. Studies have been done on the clogging of drainage geotextiles, and as long as you are using the proper type for your use, the performance of it remains intact.
You might have dug up old fabric and see it "clogged" with silt or sludge, but usually this wall of muck is more permeable than the soil next to it. The Army Corps and every transportation dept in the US use it on underground drainage, and their specs account for this soil migration into the geotextile. They also spec pipe sleeves, so yes "clinging" is acceptable.
Any trench dug in soil allows a faster movement of water, so they should always have a geotextile.
Most don't consider a wrap on a perforated sump crock as critical because its in undisturbed soil with a concrete roof, and you can always clean out the crock if necessary. Usually though the soil type will dicate whether you use a natural filter (like gravel), but most sump crock manufs dictate a 4"-6" gravel fill anyway. So then use a geotextile encasing the gravel just like when you use it on a footing drain tile, a yard french drain, or drywell.
Make sure you don't use cheap landscape weed fabric. Use a non-woven, polypropylene needlepunched geotextile. And the gravel should be washed 3/4" angular or less, but larger than 3/8". If you can only buy bags of pea gravel, then you would need a fabric on the crock to keep the gravel out.
Thanks.Usually you do a lot at a time, like all the exterior/interior footing drains, so real geotextile comes in big rolls. Smallest at HD is 3'x300'
Non-woven fabric
The important part is "non-woven" and "needlepunched" (to not clog).
If you only want to use the landscape fabrics or don't want the leftover good stuff laying around, you'd be better off with nothing.
Any angular gravel is just crushed stone, and it locks together better than rounded. The important part is "washed" (no fines). I don't think you can buy bags of this at the box store. But you can buy bags of pea gravel, which also drains, just you should have a fabric around the crock to not allow the 3/8" and smaller size to enter any holes you may have.