Test 1 Post author By Admin1620 Post date March 18, 2020 No Comments on Test 1 Welcome to your Test 1 What color is the suction line hose on your manifold gauges? Red Yellow Blue Black What color is your liquid line hose on your manifold gauges? Red Yellow Blue Black Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.