We have been pleased with the performance of the AquaRex System on our domestic water applications.
Even though we installed it on 2 of our irrigation systems we have not had adequate run times for evaluation.
We do have an installation at Stopher/Johnson Hall on the Domestic Hot Water system.
Shortly after the AquaRex system was installed we had to replace the tube bundle in one of the 2 domestic Hot Water Heaters because of a warped head.
The old tube bundle had hard scale formed on the tubes. This scale would crack and break off of the tubes and collect in the heat exchanger to go down the system and be found on the screens in the mixing valves. After 1 year of service we pulled the new bundle and the copper tubes only had a very thin layer of a fine powder on them that could be easily wiped off.
We are planning to pull the tube bundle in the 2nd heater at Stopher/Johnson to see if the old scale has been removed from tubes of that unit.
The problems with the pistons in the mixing valves seizing up has stopped since we have using the AquaRex System.
We had been on a 3 month cycle of pulling/replacing/cleaning cartridges some of our mixing valves to prevent control problems.
In one of our buildings Centennial Court B where we installed the original AquaRex systems for testing have been performing well.
I just spoke with the plumber and he said that he has not pulled/replaced those cartridges for 8 months now because they have been controlling the water temperature.
He is planning to pull those cartridges tomorrow just for preventive maintenance purposes and I plan to take pictures.
I suspect that since they have not had problems with controlling temps. that they should be clean and moving freely.
I would be happy to provide you additional information once we open that other heat exchanger at Stopher/Johnson to see how clean it is.
Please feel free to provide my contact information to others who have similar issues and would like my opinion.