You're right, there is always a negative to a positive.
I get some water in my other bags if I'm trying to fill just one.
If I was building from scratch I wouldn't have sprinkler valves, but a pump for each bag. Eventually I'll re-do it that way.
I don't mean to hijack the thread, but have any of y'all seen one of these before? It might be a little less convenient but imagine the fill times!
My personal opinion is that the Johnson reversible pumps are going to be the most practical and fastest system given you have one for each bag and a dedicated intake. That's the route I'm going.
From a plumbing and installation standpoint flexible vane impeller pumps are the easiest, but an aerator based system can be just as fast and functional if installed correctly.
We've been VERY impressed with the Johnson pumps so far, they're significantly faster than the Jabsco, and if you already have a switch, the cost savings is considerable (even if you need switches, they're still cheaper than the Jabscos).
Either one is a great pump, it's just nice to have a choice now.
His test isn't exactly perfect because the pump is above the water line - sucking water instead of pushing it but I think it's close enough to draw conclusions.
- The aerator pumps will never be faster than the impeller pumps. The Tsunami is just slight faster than the Jabsco totally unrestricted but the aerator pumps lose volume very quickly with added pump head (vertical height from pump outflow or restrictions such as the hose, fittings, etc.)
- In his tests, the Johnson pump outperformed the Jabsco by 17-31% depending on the setup.
- If using the irrigation valve method, Irritrol valves perform much better than the Orbital valves when using aerator pumps. These valves really hurt the performance of the aerator pumps but the impeller pumps are affected less. (I read that the only problem is that the Irritrol selenoids aren't specified as ignition proof, but they are water proof which probably means they are sealed well enough to be ignition proof but no guarantees.)
Originally Posted by Fresh Fish via CenturionCrew
Great stuff. Thanks for posting this. It should be very helpful.