Case Studies

Blogs, Case Studies | October 3, 2025

Replacing Heating System Pumps with Smaller Pumps to Reduce Life Cycle Cost

The heating system in an office building required renovation. The options considered were replacing the 3 existing pumps with ones that were the same power and eventually replacing the thermostatic valves, as well as redesigning the system to have four sub-systems with optimized dimensions using equal friction loss per pump. The latter option allowed for smaller pumps to be used which cut down on the life-cycle cost.

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Blogs, Case Studies | September 20, 2025

Second Pump Installed in Parallel to Improve Energy Efficiency of Water Circulation System

A pump used in an open system for pumping water from circulation tank into two wire tanks was worn down and had decreased efficiency. Analysis was done to compare the cost benefit of installing two modifications to the existing system. With an increased demand required only during startup, the conclusion was installing a new smaller pump parallel to the old pump to provide the base load duty. The old pump would only be used during the start up period.

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Blogs, Energy Efficiency, Case Studies, Commercial Building | August 1, 2025

Downsizing a Residential Circulator to Reduce Life Cycle Cost

A 30-year-old circulator needs to be replaced in a one-family house. An analysis on the system was done, which concluded that the electronic circulator could be downsized due to the existing hydraulic resistance in the system.

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Blogs, Case Studies | August 1, 2025

Cost Analysis of Replacing Power Plant Cooling Water Volute Casing Pumps with Mixed Flow and Variable Pitch Propeller Pumps

Overview: Replacements are being considered for a cooling water system that currently consists of four volute casing pumps. A cost analysis is done comparing the baseline versus variable pitch propeller pumps and mixed flow pumps with variable inlet guide vanes. Mixed flow pumps have the fastest payback in this application with a payback time of 0.4 years.

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Blogs, Water/Wastewater, Case Studies | March 20, 2025

Complex Flooding Issues in Alaska Town Leads to Unique Lift Station Design

Overview: August 2024 – Stormwater – Upgrade of the system to accommodate storms and mitigate flooding. If the flooding wasn’t addressed then the problem would continue potentially affecting homes, utilities, and infrastructure. With existing utilities, a stepped-down wet well was utilized to prevent any problems with those utilities.

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Case Studies, Blogs, PSM Newsletter | December 12, 2024

Field Evaluation of Different Check Valve Designs and Surge Pressure Measurement in a Municipal Water Pumping Station

Overview: During a municipal water pump station upgrade, hydraulic engineers got approval to perform field tests to assess the waterhammer (pressure surge) transients. Surge pressure measurements were taken after an induced pump power loss and subsequent check valve slam. They also developed a computer model to see how well available software could simulate the produced transients. This data was gathered to provide guidance to the municipality on future project work.

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Blogs, PSM Newsletter, Case Studies | June 18, 2024

Minimizing Maintenance Costs by Right-Sizing Dry Weather Pumps

Overview: The Norchester Pump Station was rebuilt in 2016 with dedicated dry weather and wet weather pumps. Between 2016 and 2018, the dry weather pumps required more than 5,000 hours of labor and $20,000 in parts for corrective maintenance due to pump ragging and pump failures. These pumps were replaced with smaller, properly sized pumps in late 2018 and have operated without significant issues since saving time and labor and increasing the reliability of the station.

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Blogs, Case Studies | March 28, 2024

An IoT Approach to Improving Wastewater Facility Operational Efficiency

Overview: This case study has altered the names of the county and business partners involved. Roadrunner County is at the heart of Arizona’s major commercial and academic hub. This county has taken significant steps to look after the well-being of its citizens by preserving one of the most precious resources: water. Using an IoT solution based on situational awareness, as well as a mobile workforce and decision support system, the Roadrunner County Regional Wastewater Reclamation Department provides management and maintenance of the county’s sanitary sewer system.

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Blogs, Case Studies | October 17, 2023

Improving Booster Pump Set Efficiency Using Variable Speed Drives

Overview: An existing Booster pump set designed to provide a continuous and steady supply of water to a small community of 40 homes. The initial system utilized two fixed speed pumps operating in an on/off pressure control mode to pump water from a storage tank and maintain water pressure to the community.

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PSM Newsletter, Case Studies | September 28, 2023

Benefits of Remote Monitoring of Sewage Pumping Stations

Overview: This case study will show the benefits of a remote monitoring solution in a municipal sewage lift station application. The station monitored was a Duplex Lift Station with ongoing failures.

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