For technicians servicing residential air conditioning or commercial refrigeration units

The C3-303 is a snap-in style latch

For technicians performing TXV troubleshooting and repair

When performing a furnace flame sensor replacement

reducing mechanical noise and wear on the fan assembly

Watts 0385511 Test Kit 318518-761 For technicians servicing residential airThe Watts 0385511 (Model TK 99E) is an industry standard backflow preventer test kit engineered for field service technicians who require precision and durability. This analog test kit is designed for the comprehensive evaluation of Reduced Pressure Zone Assemblies (RPZ), Double Check Valve Assemblies (DCVA), and pressure vacuum breakers. Featuring a large 4 1 2 inch anti parallax differential pressure gauge, the unit provides high visibility readings