McDonnell & Miller 27-W Control Freon Is there a difference between

Is there a difference between the 0901755A and the 0901755A/U

The Burnham 8026032 Glass is the direct OEM replacement engineered to handle the thermal shock and high-pressure environments of residential and commercial heating systems

100°F+ required for gas ignition

minimizing interference with sensitive control electronics

including the ADF (300-1200)

McDonnell & Miller 27-W Control Freon Is there a difference betweenThe McDonnell & Miller 27 W is a robust, float operated liquid level control specifically engineered for make up water applications in open tanks and receivers. This mechanical water feeder features a high capacity valve mechanism that responds to minimal float movement, ensuring a consistent liquid level in commercial and industrial systems. Built with a durable brass body, a Monel valve seat, and an EPDM disc, the 27 W is designed to handle