Existing force main is a mile long raw water line coming to wastewater treatment plant and there is no way I can model that as I don't have as-built drawings. When plant operates as required, measurement at the place where proposed piping from pump station will tap into an existing raw water force main is 25 psi. I understand everything you said about peak flow and non peak flow, pump size, selection, etc. Is there any way I can use Watercad and create junction with pressure at 25 psi. What about 'Although you can force a pressure at a location by using a reservoir' from previous post? Do I need to convert 25 psi to head and use it as a reservoir elevation? Any other idea how to accomplish this? Thanks for help!
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