we like the SCALA 2 - pressure is good and immediate. I was told that the town mandated the builder place pressure pumps in all the houses on our street in order to get approval to build the development. We have an irrigation system that we run at most 6-8 weeks in the summer. Now the Gurunfos rep is saying that we should get rid of the SCALA 2 and go back to the pump we had previously- MQ-3.Ĩ yrs ago we had a well pump which failed after 4ish - we were told there was a hole in the bladder. per Grundfos reps - back flow valves removed from the unit and there was one additional valve before the unit that was also removed. water pressure checked at the house (after the meter) -35psi water pressure checked at the street - 35psi we noticed and then reported the issue to our plumber, Grundfos instructed him to replace the pump to fix the issue. I have video clips of the pump and water heater along with a pressure gauge readings while it is happening. The fluctuations also cause fluctuations at our on demand water heater - the temp of the water doesn’t change but you can hear the heater motor surge when the SCALA surges. You can see and hear the water fluctuations at the end source (toilet and faucets). Periodically the #5 error code lights up. This cycle repeats about every 45-6o seconds as long as the demand remains. However, with a large draw (toilet flush, dish and clothes washer and tub) the pressure starts off good and then after about 45 seconds the pressure fluctuates from low to high. Pump turns on with demand and has good pressure. We had a SCALA 2 installed several months ago and have been caving issues ever since.
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