Serving all counties throughout the entire state of connecticut! Costs for fixing a diverter valve will sit around £-. I've used this company twice at two different residences they have been great! We can use the combined boiler or an accumulation tank with a copper flow heater to heat up hot service water (see the price list). Hour emergency call-outs with no nasty call-out charges! Imagine squeezing toothpaste with the same amount of pressure.