handling maximum water temperatures up to 240°F and system pressures of 50 PSI

Using a longer or shorter probe than the original specification can lead to delayed responses or premature tripping

Replacement is required when the pressure drop reaches 10 psi or annually to maintain system efficiency and protect downstream equipment

When troubleshooting HVAC control circuit power

Field Controls 46198901 Control Els PW 17895 handling maximum water temperatures upThe Field Controls 46198901, specifically the Model 4" MG1, is a professional grade double acting barometric draft control designed for precise combustion stability in gas fired furnaces and boilers. Engineered for high efficiency venting systems, this 4 inch regulator stabilizes erratic automotive drafts caused by fluctuating outdoor temperatures and wind velocities. By maintaining a constant negative pressure between . 01" and . 1" water column