Full Flow Design: A 3/4 inch orifice maximizes GPM throughput

This diaphragm is specifically designed for Honeywell PP901A and PP901B series units often integrated into pneumatic fume evacuation and pressure regulation systems

Stable Performance: Rated for lead insulation temperatures up to 200°C for safety in high-heat furnace compartments

The "/U" suffix typically denotes a "Universal" or retail-packaged version of the exact same flange adapter used in industrial applications

This OEM replacement part is essential for preventing heat exchanger damage by disengaging the gas valve and activating the blower motor when internal plenum temperatures exceed safe operating parameters

Hydrotherm 02-2406 Aquastat 320788-702 Full Flow Design: A 3/4The Hydrotherm 02 2406 Aquastat is a mission critical immersion type temperature controller engineered for high performance hydronic systems. Featuring a Single Pole Single Throw (SPST) switching configuration, this rugged aquastat relay provides precise thermal regulation across a broad 40F to 240F operating range. Designed for direct insertion into the medium, the Hydrotherm 02 2406 functions as a reliable high limit or low limit control, ensuring