Domestic Water Pressure Booster Sizing Part 1: A Road Map for Success

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Domestic Water Pressure Booster Sizing Part 1: A Road Map for Success

No engineer ever wants to find out that a design error is the source of insufficient water pressure in a new hotel or apartment building. But make no mistake, when tenants on the top floor of a building can’t flush the toilet or rinse…

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How to Pick a Centrifugal Pump Part 4: Pump Coupling Types – Close, Split, or Flexible Coupled?

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How to Pick a Centrifugal Pump Part 4: Pump Coupling Types – Close, Split, or Flexible Coupled?

Centrifugal HVAC and plumbing pumps may be direct closed coupled or flexibly coupled. Pump couplings serve an important purpose, the greatest of which is to...

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Part Load Efficiency Values (PLEV) Part 3: 3500 vs. 1750 HVAC Pump Selections

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Part Load Efficiency Values (PLEV) Part 3: 3500 vs. 1750 HVAC Pump Selections

In our last two blogs, we discussed Part Load Efficiency Value (PLEV) from Bell & Gossett. Today we will discuss how using PLEV as the only criteria for selection can lead to HVAC pump selections that aren’t necessarily the best choice...  

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Domestic Hot Water Recirculation Part 8: Proper Application of Pressure Reducing Valves

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Pressure reducing valves (PRVs) are a necessary component in just about any domestic hot water system served by a high-pressure domestic water supply main. In this blog we’ll discuss how to apply PRVs properly so that these “necessary components” don’t become necessary evils that create water service problems and huge energy penalties for owners.
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Domestic Hot Water Recirculation Part 7: Balancing Systems with Multiple Risers

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Ever have to wait 2 or 3 minutes (or longer) for hot water to arrive at the shower in a hotel room? If you know a little about plumbing design you may assume you’ve had the misfortune of choosing a hotel without a recirculation system. But chances are the hotel does have a recirculation system, it just isn’t properly balanced.
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