Does this shaft include the locking keys or set screws

You must use a compatible MKC-1 solenoid coil (sold separately) matched to your system's voltage

specifically during compressor maintenance or valve plate inspections

Can I use R-22 with this compressor

Watts 0590713 Valve mario Does this shaft include theFor high efficiency hydronic management, the Watts 0590713 Valve (Series HAV) delivers precision air removal across residential and commercial heating circuits. This 1 4" HAV automatic vent valve is engineered to eliminate air pockets in baseboards, convectors, and radiators, preventing the common service calls associated with noisy pipes and poor heat distribution. Featuring a two piece chromed brass body, the unit integrates a moisture retaining