PBW2
Civil/Environmental
- Apr 25, 2003
- 58
A client has asked us to look at modifying an existing submersible pump station to have the FM come out of the top of the wetwell (above ground piping with check, plug, and ARV installed) and then dive back below grade. The existing setup has the 4" FM going through a valve vault. The 4" FM ties into another 6" FM and the elevation stays pretty constant (flat) until it dumps into an existing MH.
Bringing the 4" FM above ground puts the high point of the FM (+23') at the PS. The discharge at the MH is (+14'). A couple of questions come to mind:
[ol 1]
[li]Should we be concerned that the ARV is at the high point right at the PS?[/li]
[li]Is siphoning a concern? Should the ARV be a combination valve?[/li]
[li]Other concerns?[/li]
[/ol]
Thanks in advance for any input/suggestions!
Bringing the 4" FM above ground puts the high point of the FM (+23') at the PS. The discharge at the MH is (+14'). A couple of questions come to mind:
[ol 1]
[li]Should we be concerned that the ARV is at the high point right at the PS?[/li]
[li]Is siphoning a concern? Should the ARV be a combination valve?[/li]
[li]Other concerns?[/li]
[/ol]
Thanks in advance for any input/suggestions!