Paper- or paperboard-based floor coverings Tenders , Iron or steel tanks Tenders , Solid flooring Tenders , Taps, cocks, valves and similar appliances Tenders , Taps, cocks and valves Tenders , Valves defined by function Tenders , Central-heating radiator valves Tenders , Valves defined by construction Tenders , Penstock valves Tenders , Works for complete or part construction and civil engineering work Tenders , Flatwork for zoo Tenders , Roof works and other special trade construction works Tenders , Flashing and guttering work Tenders , Flashing work Tenders , Special trade construction works other than roof works Tenders , Water distribution Tenders