Seaflo 12V 100PSI Self-Priming Diaphragm Pump

I first purchased a similar, cheaper pump (not Seaflo). It burned out after a few days, but likely due to my negligence - I ran it continuously for hours at a time (I'm circulating water from my plunge pool to a tankless heater). So I needed another pump, perhaps larger capacity, perhaps better quality. For me, looking at different brands (theres at least 10 for this type of pump on Amazon) did not make choosing easy. Speaking of "brands", Im a bit dubious, because many pumps look exactly alike. Perhaps there are only a few manufacturers putting different brand labels on the same pump? I'd like to think no, this isn't the case...But I digress... I chose the Seaflo based on reviews. Delivery was very fast. This time, I connected TWO pumps in parallel with one-way-valves in place. I switch from one pump to the other every 15-20 minutes, creating my own on-off cycle time, yet keeping continuous flow. The Seaflo pumps, in general, vibrate less, are less noisy, and they run cooler (regardless of the on-off cycle) than my previous one. I realize that using 2, higher-PSI pumps on a timed cycle cannot be fairly compared to my previous experience with a single pump, but that aside, I think my Seaflo pumps are a good choice.

I have a NorthStar yard sprayer. Unfortunately, the pump failed after 2 uses. The sent me a replacement pump and it failed just as fast. I ordered this pump and it works great. It works consistently and is considerably stronger than the original.

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I received the pump and some water drops are coming out of it. Is it normal?

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