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About us

Multiplex Engineering Limited is a well established company with an excellent reputation in Irish industry including the Dairy, Brewing and Pharmaceutical sectors. We specialize in supply of instrumentation and valves from our Drogheda base. We stock hundreds of “off the shelf” items in order to respond to customer needs as fast as possible and minimize their plant down time.

Amongst our many services we specialise in valve and transmitter repairs. Service replacements can usually be delivered immediately from our extensive replacement stocks. Learn more >>

Paul O'Neill


The men behind Multiplex








In Memory of our Friend and Co-Founder

Paul O'Neill.











Smart and profitable solutions for medium and small business.



Multiplex Engineering carry the largest stock of new and surplus instrumentation, control valves and manual valves in Ireland and the UK . What ever the problem, we can supply or repair with a fast turnaround so downtime on your plant is kept to a minimum.
Multiplex have an in-house facility to service every type of valve. We have a dedicated valve repair workshop with a separate machine shop to cover all repairs and customized modifications. All valves can be test and supplied with test certificates. Learn more >>