Engineering would be considerably simpler if water always arrived at the same pace.
It does not.
The quality of water that is pumped into a residential system may vary through the day. Industrial and commercial structures may have operating periods of peak. Conditions for stormwater may drastically alter according to the weather. Demand for clean water can also change dependent on the use.
To design a pump station, it’s not just about choosing the right equipment to be able to handle a particular flow. Engineers need to know the different conditions that the system could be utilized.

Image credit: romtecutilities.com
Think beyond the capacity of your equipment, as well as operating conditions
The highest flow is crucial, but this is only part of the station’s operation. Let’s say that a wastewater system is constructed to handle a large maximum flow. The majority of the time the flow inflow could be significantly lower. During normal operating hours the station must be functional.
This introduces questions about wet-well sizing, pump operation, control, head conditions and how equipment reacts when demand changes.
The design of a well engineered package pump system takes into account the specific requirements of the site, rather than focusing on the max capacity of the pump.
The wastewater industry has its own day-to-day rhythm
A wastewater lift station serving homes, businesses, or municipal infrastructure may experience changing influent conditions throughout its operating cycle.
The system needs to take in wastewater and then activate its pumps in line with the strategy of control established for the station. The structural dimensions, the pumping equipment and piping, as well as electrical parts and controls, all play a role in this process.
The design can also incorporate aspects specific to the particular site. Romtec Utilities will incorporate any extra systems, including grinders, vaults, and odor-control systems as needed. The result is a station that is engineered to fit the project, rather than being a generic design which can be applied to all wastewater sources.
Stormwater Changes Much More Rapidly
Stormwater is a totally different type of operation. A stormwater station is usually quiet in dry conditions, but then experience a large inflow of water following a severe weather incident. It could be part of a larger flood-control, detention, treatment, or drainage strategy, which makes the stormwater strategy surrounding it an important part of system design.
When constructing these systems Romtec Utilities considers a variety of variables, including the flow rate that is required, head condition, dimensions of the system, site requirements and environmental factors.
Stations for commercial development may appear different than the ones designed for municipal stormwater applications.
The Head Conditions are important. Along with Flow
The ability to move 1,000 gallons is just one aspect of the engineering challenge. Engineers must know the direction that water will flow and how much resistance it will face.
Variations in elevation, piping design the discharge conditions and other aspects of the system influence the head conditions against which pumps function.
This relationship between flow and head is another reason to select a pump solely based on its ratings isn’t enough. The pump technology and station configuration should be designed to meet the hydraulic requirements of the whole application.
Create the station to meet the conditions it is likely to encounter
Romtec Utilities creates customized pumping system for wastewater, stormwater and clean water systems. They also design and develop systems for boosters, industrial and other applications. The process can include budgeting and preliminary design as well as complete plans, system supply, documentation and startup testing, and commissioning.
The basic principle of engineering is that a genuine pumping systems can’t function under a single condition.
They must also consider the specific hydraulic requirements of the project, and also the changing flow, demand and requirements. This fact is something to consider when designing a station that is successful.
