The Hidden Hydronic Problem Nobody Checks: Water Velocity

Nice job on this case, Ray. The graphics, length of the presentation all work well.

You left us hanging at the end, :) "ask yourself one simple question, how fast is the water moving"

How about a part 2 how to determine flow velocity in hydronic systems?

We had what was thought to be a small case of velocity erosion on a new commercial building. Upon removing the leaking piping, it was discovered that the leak was caused by visible pipe wall erosion. Much like a riverbank looks after a heavy rain. Obvious erosion.

Over a span of a few years, small erosion issues would arise from time to time.

What we did to correct this was to add Variable Frequency Drives (VFD) to the heating systems' circulators, as well as microbubble air separators. This was done some thirty-plus years ago, and the results are still proving successful to this day.

I haven't seen much on velocity issues, but they certainly need to be considered. They are not always obvious and can cause a lot of headaches.

@RayWohlfarth Thanks for this video. It is a very helpful subject.

My buddy bought these used on ebay for about $150 each. They are getting harder to find. Covers 1/2"-3/4" and 1"-1 1/4"). He added rechargeable battery pack, some wires/connectors, and a harbor freight case.