All right Volenti!!! There's a guy that's willing to go the extra mile!
Still though, like I said earlier, a pump failure is a risk, and if you are going to go through a Risk Assesment exercise, you'll find that the pumps are very reliable, and that their failure is highly unlikely. That being said, setting up these pumps in series poses NO RISK since there will still be some flow, as Volenti just demonstrated, if one of them goes dead.
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