the Robertshaw 1751-013 is specifically for 11" WC LP applications

you typically require a shorter shank model to ensure the NTC sensor sits at the correct depth within the immersion well

making it a staple for pneumatic systems

the ZDB-12X18 is a rectangular parallel blade damper

Heil Quaker ICP 1175651 Cap 322055-301 the Robertshaw 1751-013 is specificallyThe Heil Quaker ICP 1175651 Cap Service Kit is a field critical component designed for specific HVAC compressor service valves. Engineered for a precision fit on 15 16 20 thread access ports, this service kit includes the necessary solid brass cap and high grade elastomer gasket to ensure a hermetic seal. For contractors performing preventative maintenance or leak repairs, replacing these caps is essential to prevent refrigerant migration and protect