Tri Underground are committed on bringing quality and innovation to the QLD Main Roads Network. Tri Underground are a manufacturer and distributor direct to the market for everything from TMR approved solid wall conduit, solid wall bends and fittings, pits, concrete products, and our exclusive TRI TUFF range. We have a proven track record for quality products and industry leading service which has allowed us to hold the QLD TMR SOA consistently for over 10 years. Products are TMR certified, and approval certificates can be provided upon request. Our branch holds large amounts of stock and deliver Queensland wide.