General Plumbing Supply 663 Speedwell Avenue Morris Plains NJ 7950 began over 100 years ago when Charles S. Goldberg started Goldberg Plumbing Supply in 1910. Goldberg Plumbing eventually transformed into one of the largest supply houses on the East Coast under the name General Plumbing Supply. General Plumbing Supply is a leading contractor resource for plumbing industrial and HVAC supplies. Areas Served: General Plumbing Supply operates 14 supply houses serving New Jersey New York and Pennsylvania. What Brands Does General Plumbing Sell? General Plumbing Supply carries name brands from Rheem Navien Lochnivar Bell & Gossett Watts Grundfos Honeywell Taco Amtrol Hoffman Little Giant Nibco Goodman Asure Daikin Reznor Panasonic Broan Ridgid Lenox as well as many other name brand HVAC supplies.