draining underground pull boxes

[cvirgil]

Anyone know of methods for draining underground pull boxes? Would you even need to install a drain?

 

[cvg]

set the box on a layer of free draining gravel or sand and backfill with granular material. provide a cover which fits tightly and a gasket or seal to prevent water from coming in the top

 

[Ussuri]

Alternatively if your soil is not free draining you can construct a base slab with a sump in one corner big enough to accept a small submersible pump. Say 300mm x 300mm by 300mm deep.

 

[RDK]

I once put a system of underground conduit with manholes that was in a heavy clay soil.

We simply put sump pits in each manhole and ran a 50 mm PVC with a heat trace line from manhole to manhole. The seepage was pumped through 4 manholes before we got close to an existing drain.


Rick Kitson MBA P.Eng

Construction Project Management
From conception to completion

http://www.kitsonengineering.com