PHMSA has become aware of the sale of adapters designed to allow refilling of DOT 39 cylinders using larger cylinders (see attached photographs). These adaptors are sold at various retail outlets and online. Some of the common trade names are the “Mac Coupler”, “Mr. Heater” and “Shnozzle”. “MacCoupler” is manufactured by KM North America in...
Safety Alert – PROHIBITED REFILLING OF DOT 39 SPECIFICATION CYLINDERS
