Well this is interesting. I am finding the pump itself is just fine! I took it out of the test system and hooked it up in the bathroom sink with a big hose going into the water and the outlet hose going back into the sink and it works great! Lot better than it does in the test system. I even put my thumb over the outlet and blocked the flow off and the impeller kept turning and the pressure remained constant as it was wanting to push my thumb away. The thing has balls!
So this leaves me with the question on whats going on when it is in the test system? As I watch it it alomost looks as if it is getting vapor lock of somekind. The pump will just bind up and stop. Works fine outside of the system though. Maybe having all that water sitting much higher than the pump is causing to much weight to be forced on it and it is binding?
Here is a pic of the setup. The red arrow is the res/airtrap holding about 3/4 gallon of water. The yellow arrow is the outlets of the block going into the res/airtrap. The blue arrow is the inlet of the pump.
Tomorrow I guess I will rework all this.....
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