Home / Forums / Melodica construction, repair and maintenance / Plastic cap in the spit valve / Reply To: Plastic cap in the spit valve Reply To: Plastic cap in the spit valve March 3, 2015 at 12:32 pm #4247 ericdrumerParticipant Greetings Lowboy & thanks for your thorough response. I hope to one day contribute some musical ideas to the forum.