List Of Average Home Water Pipe Size References. Allowance for equivalent length of pipe for friction loss (valve and threaded fittings) diameter of fitting (in inches) 90. Here are other average pipe sizes.

2) change the piping arrangement to a primary/secondary type of piping with a decoupling loop. National and local plumbing codes dictate the size (diameter) of the water supply pipes that are to be installed in residential structures as well as commercial and industrial structures of. Chilled water pipes have standardized sizes.