This is a very simple riser diagram. It's in isometric 3D format so you can see what pipes have slope, what pipes are vertical in walls, and what pipes run horizontal in walls. Copyright 2018 Tim Carter
How To Draw Riser Diagram - Not Too Easy, Sorry!
You want to know how to draw a riser diagram. I get it. You need to pull your permit and you're stuck.
The trouble is you need to have a deep understanding of plumbing waste and vent systems to be able to draw one correctly.
If you take a piece-of-crap drawing into the building and plumbing department, they'll probably show you the door.
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I'm A Master Plumber Who Draws For People
I've drawn many many riser diagrams. I'll never forget the day I sat for my master plumber's exam.
We had to draw a riser diagram for a multi-story building that had all sorts of crazy fixtures in it. I loved making these diagrams.
Two weeks after the exam the head of the plumbing department called me to tell me I was the only person to ever get the entire drawing correct. I found that very hard to believe because I knew many many intelligent plumbers in my city that sat for the same exam.
It's important to realize I now draw them for homeowners all over the USA. Click here to hire me.
Basics Needed To Draw A Riser Diagram
Here's what you need to draw a correct riser diagram:
- 30/60/90 triangle
- fixture unit table
- pipe size table
- knowledge of dry and wet vents
- knowledge of illegal fittings under slabs
- knowledge of best plumbing practices (CLICK HERE to download)
The plastic triangle allows you to draw the proper lines in a 3D format so it's easy for someone to visualize the true relationship of the pipes once they're installed. Here's a typical photo of pipes going in and you need to be able to represent this on paper with just lines:
These are real pipes under a slab. You need to be able to draw this up on paper so someone can create the same thing looking at your drawing. Do you have those skills? If not CLICK THE PHOTO and hire me now. Copyright 2018 Tim Carter
Solid and Dashed Lines in Riser Diagrams
You'll notice both solid and dashed lines in the riser diagrams on this page. The solid lines carry liquid and solid waste and the dashed lines are designed to only contain air.
However, the dashed vent lines do carry liquid in the form of condensate so they need to be installed so they drain by gravity.
The trouble for a rookie like you is that some solid lines in riser diagrams can also be approved vent lines too.
See how you need to be a master plumber to understand what's going on? The diagram below has a short section of this hybrid waste/vent line. See if you can identify it.
I'm a master plumber and I drew this in about ten minutes. It shows the fixtures in a bathroom that's being added to an existing home. The solid lines carry water and waste. The dashed lines only carry air and some condensation water. (C) Copyright 2018 Tim Carter - Master Plumber
Hire Me To Draw Your Riser Diagram If You're Confused
Do you want me to draw your riser diagram so you know what pipe to buy, what fittings to get and so you can pull your permit? I'll do it. CLICK HERE to place your order.
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