What size is the connector on the model # CMEC6150 compressor? Wilson October 03, 2020 20:01 The connection for the hose is 1/4". Related articles Why is there no air pressure building up in the compressor model CMEC6150? Why is the line continuing to feed out on my model number CMCST910M1? Will the CMHT65081 work with a 1/4 ratchet? Comments 0 comments Please sign in to leave a comment.