What Causes Water Hammer in Condensate Systems? (And How to Stop It) - Weekly Boiler Tip

Water hammer in a condensate system almost always means one thing: steam and condensate are mixing when they shouldn’t.

In this video, we break down why condensate lines hammer, how flash steam is created, and the most common piping mistake that causes violent shock inside the system.

If you’re troubleshooting banging pipes, shaking lines, or loud impacts in your condensate return, this explanation will save you time, repairs, and callbacks.

👉 For condensate system parts, traps, pumps, and expert support, visit
https://www.boilerwarehouse.com/

👉 Training, troubleshooting, and boiler education at https://www.wareinc.com/


⏱️ Chapters

00:00 What condensate hammer really means
00:22 Why steam exists in condensate lines
00:53 Flash steam explained (and why it usually doesn’t hammer)
01:22 The real problem: mixing hot and cold condensate
01:38 Why pumped and flash returns must stay separate
01:50 Deaerator connection points explained
02:01 Final rule for tying condensate systems together

⚠️ Disclaimer
Ware Boilers’ videos are intended for promotional purposes only and do not constitute professional advice. Always consult a licensed boiler professional and manufacturer specifications before making any adjustments.


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