We took advantage of the great weather last week and installed a septic system that included a 1500 gallon tank, a 5 outlet distribution box with baffle and an 18′ x 40′ stone and pipe leaching field. Over the last few years the majority of septic systems we have installed have been plastic leaching chambers covered with sand, but we are seeing a trend of many engineers switching back to the old stone and pipe systems. No matter what type of leaching field the septic plan calls for we highly recommend installing a vent pipe. The vent pipe adds oxygen to the leaching field, which in turn helps the bacteria in the leaching field work more efficiently. We paint the exposed pvc pipe black or green and recommend that a bush or stone be put in front of it. There are other products such as bird baths, granite posts and fake boulders that are made to fit over the pipe and no one will ever know it is there.