I need a drain system that wont clog in VERY FINE, sandy soil that can handle 9-10 gallons a minute for hours. Ideally the system won't rely on fabrics to keep the fines out, since ALL fabrics used in my area seem to fail at keeping the fines out. The source is at 50psi, something that can handle pressure build up and not clog is ideal. If pressure builds up in the drain thats fine, just dont want it to result in fines infiltrating the chambers. I was initially interested in a chamber system, but as I started to read they require geotextile fabrics to keep fines out of the chamber. Ideally the system wouldnt rely on fabrics, since all fabrics used so far in my area have failed. (Could I just buy a solid chamber with no slits in the sides? Maybe buy old culverts and cut them down the sides) The other types of drains i've considered is a re-injection well, but i've heard the well heads can clog too if the water is high in rust. (Very high rust here). The re-injection well is interesting since the water is pressurized coming out and our water table is at 20ft. So a couple sand points hooked to the outlet might work perfectly, until they clog with rust. And lastly maybe just trying the trench drain again, using lots of gravel and topping it and the sides with a thick plastic or some fancy geotextile that is better than the junk the drain tile socks come with. Heck I'm even considering a combination of all 3 just to see which one will actually work. I plan to buy a backhoe attachment for my tractor, so digging lots isnt a concern. Back story: I have an open loop geothermal that pumps about 9-10 gallons of waste water per minute into drain tile with a sock. We have EXTREMELY sandy soil that is VERY FINE, the original drain tile (with sock) was clogged and replaced by the old home owner 2 years ago. When I purchased the place, the 2 year old drain tile was clogged with fine sand. I used a sewer jetter to clean it out and its maintaining currently. (Inspection pipes I put in show I need to clean it again) Currently what happens is the drain tile builds up pressure (the pump is set to 50psi) and the water just gets forced out and often up onto my lawn. The full length of the drain tile is never used cause its clogged in lots of places. The places I had to dig and cut into in order to clean the pipe out from are prone to leaking up into the yard.

Let me start by saying this forum has been very informative! My situation is a but unique and I will explain. My current system is: 2 compartment 750 gallon conventional septic 120ft of lateral field Cleanout on exit side of tank leading to lateral field The system was installed in 1996 3 bedroom / 2 bath 1400 sq ft house. About two months ago we had a really hard rain system move through and I noticed that water was coming out of my lateral side cleanout pipe. I had the tank pumped and found that the system had most likely never been pumped. While the gentleman was pumping the tank water was running into the tank from the lateral field. Thinking it was some sort of blockage, I snaked the lateral lines and pulled out some roots. Because of this I decided that I with the help of a master plumber friend of mine would replace the entire field to include the sand/rock material in the field. I had the tank pumped again and shut off the water to my house to let the field dry out. We began excavation and pulled out all the old material as far as we could go which was several feet. I had multiple loads of washed rock and multiple loads of sand dumped and I also bought 350ft of geotextile fabric and the piping. We layed about 7inches of rock in both trenches layed the geotextile fabric in the trenches and shot in the pipe level with an engineer level covered it with another 6 inches of rock wrapped the fabric over the rock to prevent roots and put the sand on top. The septic is draining perfectly fine into the field but I have run into the same issue where the field fills up with water and back into my cleanout. So I'm thinking wow 4k wasted replacing the field. It took about a month for the field to fill back up. So I cut out my shower and my washing machine from the septic and re directed the grey water. I established the rules in my house to let the yellow mellow and only flush solids. That's been for about 2 weeks now. The water level dropped in the cleanout pipe but then in rained for two days straight and it filled back up again. We have continued to baby the system and I'd say in the past two weeks have only flushed the toilet 10 times. The water has gone down in the cleanout but I dug out several areas of the field 1. To make sure I was getting even distribution and 2. To see what was happening out in the field. Well I can confirm I still have 120ft of pipe underwater. My only conclusion now is that I have a potential biomat issue. And the water is not percolating into the ground anymore. Looking for some advice as I have made several calls to septic companies in the area and they are not allowed to work on old conventional systems and recommended a new aerobic system. I absolutely am in no position to drop that kind of cash because I dont have it. I have read about the oxyclean sodium per carbonate method to help with the biomat issue. Has anyone had any success with that? I have also read about installing an aerator into the tank. Should I do both or should I do the oxyclean and then just shock the system with anaerobic bacteria? Should I pump the tank before I do the oxyclean as to allow me a good bit of time before water is re introduced into the field? I will post some pictures of everything when I get home. Appreciate any advice on this!