WEEP HOLE , drainage pipe with flap valve , consists of PVC pipe and socket with rubber valve.
Feature 1 Contribute to Reduction of Ground water pressure
If the ground water level of back side of retaining wall is high ,
retaining wall require drainage (drain pipe) to protect walls from uplift
due to byoyance force of ground water.
Feature 2 Reuse of Rain water and Ground water
It is possible to impound the irrigation channel or farm pond with using weep hole.
Ground water and rain is a gift from the earth , In the area of lacking in water
It is very useful for farmer.
♦ Ground water from back side of concrete wall goes out to the channel through pipe.
♦ Rubber flap valve does not allow the water to flow back into drainage pipe.
♦ It is not applicable where there are many trash or floating substances around.
♦ It is not applicable for ocean.