Resideo AM101-US-1LF Valve Els PW 29614 the QFM2171 is a "blind"

the QFM2171 is a "blind" transmitter designed for discreet duct mounting where local readings are not required

the Siemens 599-01081 is built to handle both liquid and steam service

Engineered Precision: CAD-developed cast iron body ensures long-term concentricity and reduced vibration in high-RPM HVAC motor applications

or if the boiler pressure gauge remains at zero despite the system being filled and pressurized

Resideo AM101-US-1LF Valve Els PW 29614 the QFM2171 is a "blind"The Resideo AM101 US 1LF is a professional grade thermostatic mixing valve designed for precision temperature control in potable water systems and hydronic heating applications. Featuring a 3 4 inch union sweat connection, this lead free brass valve maintains stable output temperatures between 70F and 145F, even under fluctuating inlet pressures. Built with a Teflon coated spool and body, it resists mineral scale buildup, ensuring long term