How does it prevent air noise if there is no bypass

It is specifically designed for Weil McLain CG

Will this fit the Empire Water 2 series

delivering precise heating control for gas fireplaces

and 3003 Series

Trane CPL0243 Coupling 318518-761 How does it prevent airThe Trane CPL0243 is a precision engineered 3 8" 90 degree liquid line coupling designed for high pressure refrigerant duty in residential and light commercial HVAC applications. This heavy duty brass fitting is crucial for ensuring a leak proof transition in tight Cabinet clearances or complex line set routing where standard sweeping bends are impractical. With a total length of 5. 6 inches, the CPL0243 OEM coupling provides sufficient surface area