Two pipe groundwater removal systems are functional and practical
One of the beautiful things about hand excavated french drains is that they can contain two pipes to serve two purposes at once. The solid 3″ abs and ads pipe is used for the creation of rain drain discharges which vent the roof water through the gutter system and downspouts.
The 3″ perforated pipe is laid next to the solid pipe on the bottom of the hand excavated french drain aquaduct for the collection of groundwater only, and acts as an overflow for the groundwater that is collected within the drainage system.
A hand excavated french drain is most often 12″ in width. The engineering of the drainage system will insure that the groundwater will flow on the bottom of the hand excavated french drain without buiding into the pipe at all, except during very hard rains. This can not be accomplished with a machine.
When the groundwater entry into the aquaduct of the hand excavated french drain is great, the groundwater flows faster within the hand excavated french drain because of the perforated pipe, due to the perforations in the pipe which pulls the rain created groundwater into the perforated pipe.
Hand excavating straight sides and a flat bottom within the hand excavated french drain is important for stability and long lasting quality, as well as the speed with which the groundwater drainage system removes the rainwater which becomes groundwater.
Read articles within this site on the installation specifics of hand excavated french drains and how to maximize your groundwater removal and save your hard earned cash with a groundwater removal system that will last a long time, and out perform the rest.