Johnson Controls T-4000-3139 Plastic Cover requiring a replacement like the

requiring a replacement like the 100241

these are specifically sized for the lower pressure and higher flow requirements of natural gas heating systems

including S1-025-27792-001

flare connection

Johnson Controls T-4000-3139 Plastic Cover requiring a replacement like theThe Johnson Controls T 4000 3139 is a professional grade horizontal pneumatic thermostat cover designed specifically for the T 4000 Series room thermostats. Engineered for demanding commercial environments, this white plastic cover provides a clean, uniform look for horizontal mounted controllers where a blank faceplate cover is required. As a genuine Johnson Controls replacement part, it ensures a precise fit for single or dual element sensing units