Circulator series pumps are those small inline pumps that have fixed impeller choices with no impeller trimming available. When these pumps have ECM technology, the... READ MORE
Printer Friendly (PDF)
Primary-Secondary vs. Primary-Variable hydronic boiler pumping systems each have advantages for the engineer to consider. Most people in the industry are in one camp or... READ MORE
Printer Friendly (PDF)
Previously, the R. L. Deppmann Monday Morning Minutes looked at pump location in a primary-variable boiler heating system. We made a very definitive statement about... READ MORE
Printer Friendly (PDF)
We recently received several calls for our recommendation on whether to pump into the boiler or out of the boiler in a primary variable heating... READ MORE
Printer Friendly (PDF)
What is the minimum flow rate a variable speed pump can provide without damage to the pump? This is a question every engineer should ask... READ MORE
Printer Friendly (PDF)
Decarbonization and Electrification are two terms which may bring both fear and hope to plumbing engineers and gas fired water heater manufacturers. The hope is... READ MORE
Printer Friendly (PDF)
You understand the differences between premium efficiency (IE3) motors and PMAC or ECM motors (IE4&5). You understand the cost implications of both styles of motors.... READ MORE
Printer Friendly (PDF)
Can I and should I specify permanent magnet motors (PMAC) on my hydronic system pumps? The last R. L. Deppmann Monday Morning Minutes showed the... READ MORE
Printer Friendly (PDF)
Hydronic system pumps and other HVAC and plumbing equipment will often have a variety of motor choices to specify. One of the newer additions to... READ MORE
Printer Friendly (PDF)
We often get questions about using Bell & Gossett pumps in institutional and commercial chlorinated water swimming pool applications. Here are a few suggestions about... READ MORE
Printer Friendly (PDF)

Categories