Hot-Water Heating → Piping and Pumps 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 → Piping and Pumps

One-Pipe Hot-Water Heating Systems


Dan Holohan shares his knowledge about one-pipe hot-water heating systems. He talks about diverter tees, monoflo tees, thermostatic radiator valves, pumping away from ...

Published on 04/13/2020 1:57 PM by Dan Holohan
Posted in Hot-Water Heating
copper leak
A Copper Mystery

We’ve lived in this little house in Bethpage, NY since 1977. Bethpage was once home to Grumman, which built fighter planes, canoes, campers, buses, and the Apollo Lunar M...

Published on 04/25/2018 11:13 AM by Dan Holohan
Posted in Hot-Water Heating
The Return Pipe That Was a Supply

The heating business has a way of humbling you. After more than 25 years of running service calls on all types of heating and cooling systems, I had managed to tackle the...

Published on 07/27/2017 2:44 PM by Dan Foley
Posted in Hot-Water Heating
hvac school
Podcast: Pumping Away and More

Dan Holohan talks with Bryan Orr of HVAC School about how he got his start in the industry, pumping away, classic hydronics, and more in this entertaining podcast. 


Published on 03/14/2017 5:06 PM by Dan Holohan talks with Bryan Orr
Posted in Hot-Water Heating
pex hydronic piping
PEX for Hydronic Distribution Piping

If you were to ask someone with knowledge of the hydronics industry, “What’s the first thing that comes to mind when you hear the words ‘PEX tubing and hydronics’?” chanc...

Published on 02/22/2017 10:01 AM by Jerry Leyte , P.Eng. and MASc.
Posted in Hot-Water Heating
repiping with pex
The Power of Re-piping with PEX

For aging buildings — or newer structures with piping-performance issues — the decision to continue repairing the existing plumbing and heating systems versus doing a tot...

Published on 02/10/2017 4:34 PM by Kim Bliss
Posted in Hot-Water Heating
Threaded Copper Tubing

A discussion on The Wall: Paul S. asked, "Has ever heard of screwed copper pipe? I have it on a job and sizes are way off.

Published on 10/11/2016 10:38 AM by Compiled from The Wall
Posted in Hot-Water Heating
Why Closely Spaced Tees?

Primary-secondary piping systems call for the tees that go off to the secondary circuit to be close together, ideally not more than six inches apart. Think like water and...

Published on 08/31/2016 11:51 AM by Dan Holohan
Posted in Hot-Water Heating