Smith 100187863 is a 4-inch aluminum exhaust/condensate elbow assembly engineered specifically for high-efficiency gas-fired boilers and water heaters

25-inch NPT air separator instead of a smaller 1-inch model

Flexible Mounting: The baseplate design supports standard 60A 3-pole contactor footprints

Professional best practices dictate replacing the heat exchanger gaskets and inspecting the combustion blower housing for signs of degradation to ensure the heat exchanger assembly operates within gas pressure specifications

Liebert 178157P2S Expansion Valve 321042-401 Smith 100187863 is a 4-inchThe Liebert 178157P2S Expansion Valve is a critical OEM 6 ton thermostatic expansion valve (TXV) engineered for high capacity precision cooling in commercial and industrial HVACR environments. Designed to maintain optimal superheat settings between 10 and 15F, this valve ensures efficient liquid refrigerant metering into the evaporator coil. By precisely regulating flow, it prevents liquid slugging to the scroll compressor and maximizes heat exchange