I did commercial concrete and foundation remediation for about 4 years in Dallas. In that time I did several sump pump projects, but one was the cat daddy. We had a 4 story apartment building in Las Colinas that sank about 4" because they built down into the water table in a drought year.
When we got in water was creeping up through the tile and by the time we punched through the concrete it was everywhere. The basement was about 6' under ground level and I put 42 piers under the stem walls and lifted one side about 2" to level.
We had a lot of water to move because the stem wall was acting as a dam almost and after lifting the water was really coming in. After running some calcs with a trash pump I figured out we ended up needing 3 sump pumps placed in corners that could each move up to 2000 gph.
Ended up going with a brand called Wayne with battery backup and WiFi notification if they go down to alert building maintenance. It was recommended by my pier supplier out of Missouri that has decades of basement/sump pump experience. I talked to one of the guys that worked on it a few months ago and he said all 3 pumps are still going strong after 4 years. They run 24/7 for 4-5 months out of the year and and then wind down until they don't run at all in the summer.
Really fun project to design, but a ***** to work in all that wet clay. Anywho. I did more research into sump pumps than most. Learned all about inches of water column, head (that's what she said,) friction loss in pipes etc. The brands that everyone recommended were Wayne, Zoeller, and Basement Watchdog. For all the other projects we just picked up whatever was available locally which was usually Zoeller or Wayne depending on the flow needed.
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