The backed up water won't be going back into the same trunk that it came out from though, it's going into another sewer trunk that leads to possibly some other water treatment plant in the district.
Yup, VFD lift stations are indeed suppose to be able to handle exactly how much influent flow is coming in. But if both pumps (including the backup one) fails then the wet well would overflow, but if I had an exiting trunk line near the top of the wet well, then the water could leave from there...
Thanks for the feedback everyone,
I realize that I need to do a bit more research into things before I go fully into this thing. Thankfully, I haven't showed anyone important my plans yet and I'm just sort of an intern at the moment.
I like jgailla's response and I actually did make the...
Hello Env. Engs,
I'm designing a wet well for a certain city in southern California. Through looking at the Hydraulic Institute manual, I found equations which would help me size the wet well if I had constant pumps. The equations for constant pumps have pump cycle start and stop times...
