| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| Manhattan Tubs/Showers |  |
Maxstraps | McGuire Manufacturing | |
| Metaflex | |
Milliken Plug Cocks | Mission Couplings | |
| Modine Manufacturing | Monitor Boiler | Mountain Products | ||
| Mr. Steam | Mueller | Murray SS Clamps | ||
| Mustee & Sons, Inc. | Myers | Myson, Inc. | ||
|
|
|