Uploaded April 2026 | Updated September 2026, 3 weeks ago
Whether you're a seasoned tech or still building your skills, drain cleaning on commercial jobs is one of those tasks that separates the pros from the callbacks. In this video, we dig into the real-world techniques our team uses to keep commercial HVAC systems draining clean and trouble-free — visit after visit.
From condensate pan cleaning and trap maintenance to brush selection, vacuum technique, and coil cleaner safety, we cover the pro tips that make a difference on the job. You'll also learn why your choice of vacuum matters, when to use nitrogen, how to handle common drain lines, and why installing unions can save you serious time down the road.
One of the biggest ways to prevent callbacks is to actually open every panel, clean every accessible section, and document what needs to be fixed — then communicate it up the chain. We talk about exactly how to do that, including how to handle drain systems that weren't designed with cleanability in mind.
The goal is simple: drain cleaning done right the first time means happier clients, fewer emergency calls, and a reputation worth protecting.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
Whether you're a seasoned tech or still building your skills, drain cleaning on commercial jobs is one of those tasks that separates the pros from the callbacks. In this video, we dig into the real-world techniques our team uses to keep commercial HVAC systems draining clean and trouble-free — visit after visit.
From condensate pan cleaning and trap maintenance to brush selection, vacuum technique, and coil cleaner safety, we cover the pro tips that make a difference on the job. You'll also learn why your choice of vacuum matters, when to use nitrogen, how to handle common drain lines, and why installing unions can save you serious time down the road.
One of the biggest ways to prevent callbacks is to actually open every panel, clean every accessible section, and document what needs to be fixed — then communicate it up the chain. We talk about exactly how to do that, including how to handle drain systems that weren't designed with cleanability in mind.
The goal is simple: drain cleaning done right the first time means happier clients, fewer emergency calls, and a reputation worth protecting.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
