Small Sewer Pump Station Design Specs

First, you need to obtain a few things first. We don't know where you are located in the world. That would help.

#1. Obtain a copy of the local or national building code that delineates the hydraulic loadings of each water using fixture. Knowing that will determine peak flows via known "fixture units".

#2. Obtain a good engineering textbook on the design of wastewater pumping stations. You can go visit to the Water Environment Federation (WEF) website and visit their bookstore to find their highly detailed book about designing pump stations. There are other textbooks available for free on the web, in the form of e-books, that deal with the subject. Do a Google Search.

#3. Obtain engineering/technical catalogs from several pump manufacturer's that include pump specifications, and pump performance curves.

If you have no prior experience designing a wastewater pumping station then you shouldn't have undertaken this adventure in engineering in the first place. My feeling is you're either a very green engineer or non-engineer.....leave it to the professionals who know what they're doing.

Lastly, we only give advice here. We do not solve your problems for you.