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Multiple pumps
Sorry for the seriatim replies, but I'm still collecting my thoughts.
Many people seem to recommend the multiple sump pumps for back up purposes. But I don't really understand this philosophy. It's just pay now or pay later. A small pump nearly costs as much as a large pump. So why pay for two sump pumps now? If the pump breaks, I can order another one shipped overnight, or if I'm really concerned about being without a pump for 24 hrs, I could buy a spare pump. Under the two-pump proposal, you are just using your spare now as opposed to having it lie around.
As for the random flow, the ball valve with one pump provides the same chaotic flow as two pumps on a wavemaker. If I used two sump pumps, and each of them in conjunction with a ball valve, that would be four sump returns. That seems like alot, no?
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