Worcester Bosch was awarded the Best Supplier, Best Heating Supplier and the Best in Branch award, as voted for by the Plumb Center and Part Center network of more than 500 branches.
England rugby player Austin Healey presented the awards and was guest speaker at the event.
The Field Sales Award, voted for by the Plumb Center and Part Center sales' teams, was awarded to radiator supplier Stelrad. Other awards also went to Bristan for Best Plumbing Supplier, Honeywell won the Most Proactive Supplier Relationship and Best Merchandising Supplier awards, and Kingspan Renewables won Renewable Supplier of the Year.
Plumb Center's trading director Alan Stevenson, said: "We value our relationship with all our suppliers and this is our chance to reward their loyalty and excellent service. We have built great business relationships with market leaders in their field and this was our chance to thank them. So that we may continue to meet the ever growing service expectations from our discerning customers we need to have great suppliers with excellent service levels."