Hydraulic piping diagrams for FOCUS pellet boilers We offer readers and buyers to familiarize themselves with the piping diagrams for a pellet boiler. Hydraulic circuits are aimed at automating the heating process. Examples of hydraulic piping diagrams for FOCUS boilers will help you to install a boiler room without preliminary design, if the system parameters differ slightly. Scheme with a four-way valve controlling the central heating circuit1: 1 - boiler, 2 […]