The H-Factor

This is a republishing of an earlier post because this is a really helpful tool when you just can't calc a system.

Sometimes when you AutoCalc only some of your
pipes actually make it to HydraCALC, or you get an error that prevents
you from loading the job into HydraCALC. Both of these can be traced
back to a problem with how your pipes are connected.

 The drawing below will not calculate:

The following error can appear when the AutoCalc process handed the job off to HydraCALC, but a different error may appear, or som pipes might be missing if the job actually goes through

To fix, start the AutoCalc Process (SAC), or you pick the Walk Model command (WMD) from the 3D Modeling/SMaRT toolbar

2.
…and pick the Check Model button. This analyzes the piping system
starting at the supply and proceeding as far as it can. When complete,
this highlights all the flowing pipe using dark blue polylines, starting
at the supply. The problem usually becomes visually apparent:

In this case, the
dark blue pline doesn't make it very far – the piping at the riser was not connected, but overlapped instead. After correction, start the
process again and pick Check Model again.