The Watts 0275825 (Series 174A) is a high-capacity ASME Section IV boiler pressure relief valve designed specifically for hot water space heating applications

The technical distinction lies in the coil voltage

bolt-on fit for rapid field installation

Zero Ozone Depletion: Fully compliant with EPA regulations as a sustainable replacement for R-22 in new HVAC installations

allowing it to operate reliably at operating pressures ranging from 30 to 175 psig

TE Connectivity KUHP-11A51-24 Relay 318518-761 The Watts 0275825 (Series 174A)When the job requires a high capacity power control solution, the TE Connectivity KUHP 11A51 24 is a standard setting choice for commercial HVACR and industrial panels. This DPDT 24Vac relay is engineered for mid to high power applications, supporting a 20Amp general purpose switching capacity. Known by technicians as the Potter & Brumfield KUHP series, this unit features a monostable coil with 72 Ohm coil resistance, ensuring consistent performance