Great customer service! very trustworthy people!! June -, , new york city, new york. Thanks for printing! don't forget to come back to delta plumbing for fresh articles! Apprenticeship involves both classroom studies and on-the-job training under the supervision of a certified plumber, called a journeyperson. How soon do you require a service? We’ll make sure your installation is seamless and worry-free. Stopped in today and heather waited on me very helpful, took her time and explained everything.