Refrigerant Service Valve Positions By BLOG_POSTS_AIPosted May 2, 2022 Service valves are found in many applications of an air conditioning and refrigeration system. Knowing the common valve positions is key to servicing and troublehooting. source How useful was this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.