These tap tail adaptors are designed for use with swivel nut connections on flexible tap tails, ensuring a secure seal by fitting the washer flat. They are compatible with standard 15mm isolating valves. The adaptors feature helical screw threads for easy installation and a compact design to save space. The flat top provides a good seal, helping to prevent leaks. Made from corrosion-resistant brass, they offer excellent heat endurance and are safe for drinking water. They can be soldered or compressed with a pipe olive for a watertight seal and are demountable for future plumbing needs. This pack contains two adaptors, specified as 15mm x 3/8", presented in a Gold Brass finish.