Directions for Installation of the Infiltrator System

This system has been accepted for use in the state of Oregon. It can be used in all approved standard drainfield sites where a minimum trench depth of 24 inches can be maintained. We are told the materials cost is increased about 300 dollars higher than the conventional rocked system. Labor is considerably less and the site is usually left in better condition since the trenches don't require rock.

A drawback to this system is the failure of the units to flex enough to make the turns necessary to maintain highly contoured trenches. To make greater than slight turns, end caps and a section of pipe is required (see diagram 1). End caps have an opening for a 4-inch pipe in the lower portion. This opening must be extended through the end cap by removing the knock out on the inner wall. The two units are then connected by inserting the pipe through each end cap and into each Infiltrator chamber. At very sharp turns, an eighth or quarter bend may be installed in the pipe.

When the drainfield trench has been excavated and leveled, the Infiltrator units are laid in the trench and snapped together. Then walk down the top of the Infiltrator units and shovel a little dirt onto the units to hold it in place during backfill.

The top of the Infiltrator should be level or slightly lower than the bottom of the high holes in a Serial Distribution Box. The top of the Infiltrator unit should be at least 2 inches lower than the bottom of the outlet hole in the septic tank in all types of septic systems (equal or serial) (see diagram 2).

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