Why did you elect to pump the waste (red and blue lines) and not run by gravity. Most plumbing drainage pipe and fittings are well suited for gravity drainage. Cleanouts in a pressure piping system need to be valved to relieve the pressure in the system, then they can be opened for cleaning. A deep sump and pump would be the easiest design after entering the WW Treatment Unit (dark blue square).
Did you evaluate using the overhead space to pump to and then use gravity piping from there?
What is the light blue line pumping, is it sanitary waste or industrial liquid waste? I don't agree with the long 45's in an open floor plan. It is very difficult in the future to gauge where the pipe is located below the slab.
How much waste water is being generated (red and light blue lines)? If you pump the liquid will you develop enough velocity to provide some scouring of the settled liquid/solid at each pump cycle? How big are the pumps and sumps?
Next topic, why is the storm drainage piping so close to the building foundation/footings? Can an excavator get that close? Why are you showing the storm drainage in the lower left corner running below the spread footings for the structure?
Too many questions for a simple answer.
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Dave Holst
MPLS Sr. Eng.
David N. Holst Consulting LLC
215-805-7002
dave@holstonline.us------------------------------
Original Message:
Sent: 07-24-2019 16:18
From: Eric Smith
Subject: Force Main Piping
What are the pros and cons of running waste water force mains under a building slab (around 400' of pipe)?
Are there any codes or standards to go by?
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Eric Smith CPD.
Plumbing Designer
WDG Architects Engineers
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