The H-Factor

Reducing Entropy

Recent Posts

Adding Hanger Types to HydraLIST

If you want to use a new type of hanger, or are a fab shop that gets a job from a contractor that uses a hanger type that you do not have, it is easy to add that new hanger type to your own machine. A hanger is an assembly, and an assembly is just…

Welcome

Recently our previous blog service (Typepad) ended their business – so, we have a new home. It will take a bit to get images back and displaying properly, but we are working on it! Final pageview count of original Typepad blog: 387,232

Using a Non-Standard Pipe Type in HydraCALC

A customer called today asking how to enter a 1″ black plastic underground pipe for the calc. This particular situation sounded unique enough that I did not tell him to add that pipe type to our database, as I would have if he expected to see this pipe type used repeatedly. I told him to…

September 2026
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Category: HydraCALC

  • Sorry for the lack of posting, between the holidays and trying to get a new HydraCAD update out the door, things have been a _bit_ busy. So – Input Types. Why use them. A bunch of reasons. What do the mean – here you go: When you right-click on the Input Type column you will…

  • Did you know that V50 HydraCALC has a tool to help you figure out what K-factor is best for your job? The tool is found in the Graphical Pressure Display (GPD), which can be used on any job that has the Input Type field filled out. Jobs that come over from HydraCALC-Sizer and HydraCAD have…

  • Another quickie, this one posed by a customer – Why am I getting negative numbers for my flow on part of my loop system? That is normal in a loop or grid. The negative sign indicates that the flow is in the reverse order of the direction the pipe has been input into the program.…

  • This one is a bit esoteric for most of you but it is critical to our European customers. HydraCALC will not load the job properly nor print it out if the Decimal and Digit grouping Symbols are not as we expect to find them here in North America. We realize this is an inconvenience and…

  • And another thing… Even been filling out an Info Sheet in HydraCALC and get to the part where it is asking for Flow Required and Pressure Required? Wish there was a quicker way to fill those in? There is! When at that page in the Info Sheet, pick the View pulldown and pick Calc Summary.…

  • If you hit the F1 thru F12 keys in HydraCALC while in the Diameter column, it will place the nominal diameter assigned to that key into the Dia. slot! That way to can keep typing along, using only the keyboard and no need to reach for the mouse… F1 = 1             …

  • Darcy-Weisbach. It's a phrase you are probably hearing more and more of. What is it? It is a formula for calculating friction loss just like Hazen-Williams. But whereas Hazen-Williams is used for water in sprinkler pipe, Darcy-Weisbach can be used for any liquid (including water, but NFPA 13 does not permit its use). Its recent…