Originally Posted by WanderingStar
Thank you all for your advice. I put a new impeller in this spring, though it might have been flawed or I might have made a mistake on the install. I will check the flow after replacing the hose. I also changed the zincs at that time. I'll check there too. The pressure in the leaking hose was high enough to shoot a stream to the overhead.
If the pressure was that great with a new impeller, I suspect that an obstructed injection port in the mixing elbow may be the villain. Perhaps debris blown out of the heat exchanger bundle or otherwise. Heat exchangers are not that difficult to clean out but a pain in the neck. The injection nozzle on the mixing elbow? Well, changing the elbow may be the fastest--and surely cleanest--solution.
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