The P320911A is the standalone speed selector switch

This pneumatic component serves as a direct replacement drain valve for A-4000-153 condensate filters

Access Valve Integration: Simplifies troubleshooting by allowing technicians to measure pressure drop directly at the filter

also identified by the interchangeable part number 068U103800

Modine 3H0346700010 Conversion Kit 30067439-890 The P320911A is the standaloneThe Modine 3H0346700010 Conversion Kit is the essential OEM solution for transitioning Modine PDP300 and BDP300 unit heaters from natural gas to liquid propane (LP). As a direct replacement for 28052, this kit ensures the manifold pressure and orifice sizing are precisely calibrated for propane's higher BTU density. For any veteran technician, maintaining combustion efficiency during a fuel conversion is non negotiable; this Nat LP conversion kit