The use of good quality spring-loaded check valves is an important part of providing your customer with a water system that will perform reliably for years.
The amount of drawdown capacity is determined by a formula known as Boyle's Law, and February's “Tech Topics” covers this formula and how to apply it to real-life conditions.
The fundamentals of pumped water systems continues this month by examining how calculate the pressure drop due to friction loss in a typical residential system.