I'm not sure what shops you have in your area, but the pluming supply houses we have here sell 6 inch PVC tubing. You could also try sewer supply places, I understand they generally carry tubing larger than 6 inches. Is the tubing 100% clogged at the tomato end? I'm wondering if you reduce the water flow into the tube, it would be able to drain out before overflowing (at least for now). Another option is if the clog is only at the end with the tomato's, you could cut one or two holes for a new overflow in the 4 inch tubing before it gets to the end of the 4 inch tubing tomato's. Then use that as the overflow. The water should still flood the tube at both ends, but the overflow tube wont be obstructed by the tomato roots anymore.
|