Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

HR Wallingford


Water research company HR Wallingford has just completed a two year Department of Trade & Industry research project into flow resistance in pumping mains. New values for pipe roughness were calculated from tests on 23 wastewater pumping systems. HR Wallingford's design guideline tables - Tables for the design of pipes, sewers and channels - are being rewritten and will be published within six months.

The design roughness values will rise slightly.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.