What are the valve fittings and why should we use them?

Valve fittings are the connecting components — elbows, tees, couplings, adaptors, unions and compression fittings — that join valves to pipework and to one another. Rather than the valve itself, a fitting's job is to make a secure, leak-free transition between pipe runs of different sizes, materials or thread standards (such as BSP, NPT or metric), and to allow a system to change direction or branch off without losing pressure integrity. Good fittings matter because a system is only as reliable as its weakest joint: an undersized or poorly matched fitting can cause slow leaks, pressure loss, or premature valve wear. Brass fittings, like the compression elbows and adaptors AMIII manufactures, are widely used in plumbing, gas and heating installations because brass resists corrosion, tolerates a wide temperature range, and machines to tight tolerances for a reliable seal with an olive/compression ring or parallel thread. When choosing fittings, match the thread standard and bore size to the valve and pipe already in the system, check the fitting's maximum temperature and pressure rating against the application (potable water, gas, heating, or compressed air), and always use fittings produced to a recognized standard (e.g. BS EN 1254 or BS 21) so performance and compatibility are guaranteed.