Earnings for self-employed plumbers dipped by just 1.7 per cent last month, according to the latest figures released by Hudson Contract.
Analysis of August payroll data for more than 2,200 construction companies in England and Wales reveals a weekly average of £1,120 for plumbing contractors.
They generated the third highest earnings of all 17 construction trades covered by Hudson Contract, beaten only by specialists in shop fitting and mechanical and engineering work.
Plumbers in the North West saw the biggest increase in weekly earnings in August, rising 18.2 per cent to £945.
They were followed by the South West, up 12.8 per cent to £1,328 and the highest in England and Wales, and Yorkshire and the Humber, up 6.8 per cent to £727.