Johnson Controls T-4000-2138 Plastic Cover This sequencer typically operates with

This sequencer typically operates with an on-delay of 1 to 20 seconds and an off-delay ranging from 40 to 110 seconds

most field technicians replace the volute gasket whenever the pump head is separated from the volute housing

Direct Cross-Reference: Fully interchangeable with ARM1010 and obsolete part number 100133544 for seamless inventory management

For contractors managing HVACR valve maintenance

Johnson Controls T-4000-2138 Plastic Cover This sequencer typically operates withThe Johnson Controls T 4000 2138 is a professional grade beige plastic thermostat cover designed specifically for T 4000 series pneumatic room thermostats. This field standard component provides a clean, streamlined aesthetic for commercial HVAC systems where tamper resistance and a minimalist profile are required. Engineered for versatility, the T 4000 2138 supports both horizontal and vertical mounting configurations, accommodating various pneumatic