these units generally follow standard sizing

The uni-line add-on design ensures compatibility with Robertshaw factory model types 7000

technicians should retain original hardware or utilize standard HVAC sheet metal screws for secure attachment to the housing

What are the symptoms of a faulty Heil Quaker 1171981 door switch

As a genuine OEM York part

McDonnell & Miller 336101 Paddle Kit these units generally follow standardThe McDonnell & Miller 336101 Paddle Kit is a critical replacement component for maintaining accurate liquid flow switch operation in hydronic and industrial piping systems. This reinforced stainless steel paddle kit includes a 1 inch and a 6 inch paddle, specifically engineered for compatibility with the FS4 3RP and FS4 15RP models, as well as the FS8 W series. Designed for field technicians, these paddles are constructed from high grade 304