صمام تجاوز أوتوماتيكي من Resideo طراز «DU144A1001»، مستقيم، 22 مم، من النوع الضاغط

Auto bypass valve Resideo model DU144A1001, straight configuration with 22mm compression fittings. It maintains a minimum flow in hydronic heating systems when zone valves close. Used to prevent pump deadheading and system noise.