Designed for compatibility with QMark MUH and Berko HUHAA series heaters

Versatile Compatibility: Designed for both slab-sensing and aerial retrofit installations

Suitable for closed-loop hot water heating systems

The tape can act as an insulator and interfere with the continuity required for the LWCO circuit to function safely

This unit provides critical high-limit protection while functioning as the primary switching relay for both burner and circulator motors

Parker Refrigeration Specialties CK4A-8 Check Valve R-448A Designed for compatibility with QMarkThe Parker Refrigeration Specialties CK4A 8 Check Valve is a rugged, 2 inch ODS inline check valve engineered for heavy duty industrial refrigeration applications. Built with a ductile iron body (GGG 40. 3), this spring closing check valve provides a positive shut off to prevent refrigerant backflow in liquid lines, suction lines, and hot gas discharge lines. As a veteran preferred component for screw compressor systems, the CK4A 8 is particularly