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A hot-water stumper

Old Spencer gets a new lease on life. Read More

How to Size Circulators

A common-sense way that's worked well for me Read More

NPSH (aka, Not Pumping So Hot)

Gil Carlson, my teacher, really knew how to turn a phrase. Read More

Sizing Circulators for Hot Water Heating Systems

Some new insights from a guy who really knows systems. Read More

The Hidden Costs of Hidden Pumps

No one will know unless you tell them. Read More

The Point of No Pressure Change

Who actually was the first to tell about it? Read More

Whither the pumps?

So, where does that pump belong? Read More

Why you should never dead-head a circulator

A lesson I had to learn the hard way! Read More