Hot-Water Heating Help Topics

Bob "Hot Rod" Rohr of Caleffi shows how to remove an old pipe nipple to make way for new fittings when restoring a radiator.

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.

I asked this question on The Wall: When do you think you need to protect against electrolysis corrosion from stray electrical current, and corrosion caused by dissimilar ...

Air is the enemy in a hydronic (hot-water) heating system. It blocks the flow to the radiators. It rattles around and annoys customers.

Start your car on a cold morning and walk around to the tailpipe. See that water dripping? That’s the way a high-efficiency, condensing boiler works.

The grocery store is a great place to understand radiant heating (or to explain it to your customer). Stop first in the gadget aisle and pick up a thermometer. It will pr...

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...

Ever wonder why so many of the old radiators you see are painted silver? Back in the day, they were mostly plain grey metal, but then the Spanish Influenza arrived during...

This is an excerpt from Dan Holohan’s book Pumping Away and other really cool piping options for hydronic systems. Since you've read this far, I figure you must be pretty...

The majority of the hydronic boilers we install today are low-mass, modulating condensing boilers. Sure, we still install a few atmospheric cast iron boilers on occasion,...