Classic Hydronics Seminar
In this all-technical three-hour seminar, Dan Holohan will give you a Liberal Arts education in those Classic Hydronics systems. He’ll have you seeing inside the pipes as...
Hot-Water Heating → Tees Help Topics
This section is your guide to hot-water heating systems with information about system design and piping, air elimination, pumping away, primary-secondary pumping, valves, radiators, troubleshooting tips, and more.
Recent Articles in Hot-Water Heating → Tees
Eureka: An Early Diverter Tee
In 1897, Eureka made an early version of what we now call the diverter tee. It worked by creating a drop in pressure along its run, which encouraged the water to flow int...
The O-S Fitting
I was looking at a photograph of Crosley Field, a grand, Cincinnati, Ohio baseball stadium that burned to the ground in 1900. The men in the photo are wearing derbies and...
Diverter-Tee Q&A
Q: What's the principle of the diverter-tee system? A: This system lets you supply hot water to a radiator and return cooler water from the same radiator by using a singl...
A Different Way to Pipe
I was raised by Bell & Gossett and gobbled up the writings of the late, great Gil Carlson for a lot of years. I learned about Monoflo systems and primary-secondary pumpin...