What is the primary difference between this and the 26C1D0F

this unit includes an access valve (T) for measuring pressure drop across the core

As a veteran-grade gas regulator spring

When replacing or upgrading Aaon rooftop unit parts

Marvair 70656 Switch 340155-7026 What is the primary differenceThe Marvair 70656 High Pressure Switch is an essential OEM safety component designed for high side protection in specialized environmental control units and commercial HVAC systems. This High Pressure Cutout Switch features a normally closed (N C) configuration, engineered to interrupt the compressor contactor circuit when head pressures reach critical levels. With a high limit 660 PSI cutout and a 450 PSI reset, this Marvair replacement part prevents