Code Velocity Maximums Plastic Pipe Materials

Please advise what Code limits there are for the use of plastic pipe materials in building services. I am not looking for generalisations or manufacturers ideas but hard and fast clauses that may appear in a specification.

The situation I have is where energy costs a fraction of what it does in the USA and therefore the NPV of Capex and Opex is different. So generalisations of maximum velocites are meaningless. Received on Thu Aug 18 03:51:00 2005