Josh is great! Today was first annual maintenance with Mother Modern Plumbing. He also replaced a crossover valve for circulating pump that should have been done when new pump was installed 4 yrs ago by another company. He found water pressure levels are higher than recommended. So, tomorrow a crew will be out to install a pressure-reducing valve. Seems like this is something previous plumbing companies I've used, would have checked but didn't. Glad to have someone be so thorough.