Installing a 40 to 80-gallon tank water heater costs an average of $650 to $1,900, ... solar water heaters cost between $2,000 and $9,000 to install but little to operate and maintain.

2,000-gallon reservoir tank installed at future Bay City Spray Park. Updated: Jul. 22, 2011, 8:00 p.m. ... the water running through the park will be cleaned and recirculated.