This adapter is made for Vigil Products from light alloy and compliant with BS 336 standards. On one end, there is a 2½” male thread compatible with BSP fittings, and on the other, a 2½” female instantaneous connection that fits standard BS336-type hoses commonly used by UK fire brigades, such as Type 2 and Type 3.. With a maximum operating pressure of 16 bar, this coupling adapter is commonly used to link hoses, hydrants, fire engine pumps, and other equipment, offering a fast and efficient solution for joining different coupling types.