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Hot Water Heater Acessories with City Water
We have pumped city water that's supposedly pretty good quality per the plumbers I talked to, and we're wondering about some of the following items we saw in the installation instructions:
1. Expansion tank need if city-pumped supply water should be consistent around 60psi?
2. Mixing valves need if we keep the 2 parallel hot water heaters at the reccomended settings for the 5 units?
3. Drip pan need if each water heater is near a floor drain?
4. Anode rod replacement need every few years (the store that sold our water heater thought we'd likely replace the heater in about 10 years before the high-quality city water corrodes the rod enough to replace it)
Any thoughts on how important each of these items are for the longevity of our water heater?