Strange PVC Piping

[sevver]

The purpose of well points is to lower the water table in the are you are going to excavate. Without the water table lowered, the wet ground would just continue to sluff in and the size of the hole would keep getting bigger and the depth may never be attained. I have worked underground for years and this can effectively bring work to a halt, you have to get control of the water if you expect to have any control over the job.

[Poolsean]

Other possibilities include:
- Electrical raceway for fiberoptic light boxes
- Hydrostatic or anti-entrapment lines

wow....cant think of anything else that would require placing pipe straight up before a deck is layed.