ULC 543

This Standard sets forth the minimum requirements for non threaded, quick connect couplings of the internal lug design for use in fire protection service.

The couplings are intended for use with fire hose in the following standard sizes: 38 mm, 65 mm, 100 mm, 125 mm and 150 mm.

This Standard also contains requirements for the non threaded, quick connect portion of adaptor fittings intended for use in modifying threaded fittings to accommodate couplings of the internal lug design. The remaining requirements for these adaptor fittings shall be in accordance with the applicable sections of the Standard for Threaded Couplings for 1 1/2 and 2 1/2 Inch Fire Hose, ULC S513.