Addison Instrumentation Addison Instrumentation is dedicated to internationally supplying the widest range of Needle Valves, Manifolds, Tube fittings, Pipe fittings and Accessories. Our success in exports is based on the management philosophy of 'Best delivery, Quality and Service'. We carry sufficient stock and our pricing is competitive. This website shows only a part of our total capabilities. Please do not hesitate to contact us for a detail product catalogue or for any specific requirements.