Tubing and Piping Support

 

Image Courtesy of Eaton SNAP ‘N SHIELD

Piping support is covered in Section 305 of the IMC (International Mechanical Code). Once again, the IMC isn't binding, but it is what most local codes are based on.

Piping / Tubing MaterialMaximum Horizontal Distance Between SupportMaximum Vertical Distance Between Support
Copper Tubing 1 1/4″ & Smaller 6′ 10′
Copper Tubing 1 1/2″ & Larger 10′ 10′
PVC Pipe 4′ 10′
CPVC 1″ & Smaller 3′ 10′
CPVC 1 1/4″ & Larger 4′ 10′
Pex Tubing 32″ 10′

 

You will notice pretty quickly that 10′ is the vertical support distance in all of these common conditions. When supporting horizontally, it's also important to use supports that won't compress insulation on insulated suction lines and drain lines.

Nowadays, there are really nice saddles for insulated lines like the B-line Snap ‘n Shield supports shown above. We recently re-insulated a large grocery store with overhead copper and replaced the existing supports with these to eliminate condensation.

—Bryan

Related Tech Tips

A Common Sense Look at Temperature Conversions
Before we convert temperature scales, let's take a step back and think about what temperature is in the first place. Temperature is proportional to the average kinetic energy of the random microscopic motions of the constituent microscopic particles, such as electrons, atoms, and molecules. Translation: Temperature is the average “movement energy” of the molecules in […]
Read more
ECM, VFD, and Inverter - What's the Difference?
Ever since Nikola Tesla invented the modern induction motor, we have been struggling with varying the speed of motors efficiently and reliably. The trouble in the HVAC industry is that there are several different types of technologies in play, and they can easily get confused. ECM (electronically commutated motor) In residential and light commercial HVAC, […]
Read more
Third Law of Thermodynamics
When someone says there is no such thing as “cold,” only the absence of heat, you can point out that while cold is the absence of heat… absolute zero is the definition of COLD. The third law of thermodynamics addresses the absence of heat and what that means for entropy. It implies that absolute zero […]
Read more

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

loading

To continue you need to agree to our terms.

The HVAC School site, podcast and daily tech tips
Made possible by Generous support from