First-Flush Pumping

Manage Contaminants in Stormwater with First-Flush Systems

Engineering Expertise for Pumping into Existing Pressure Mains

Many “first flush” pump stations will need to pump into an existing force main and on to treatment. Romtec Utilities provides the engineering capabilities to reliably pump all types of “first flush” stormwater into an existing main and on to treatment.

Combine “First Flush” Capabilities into a Larger Stormwater Pump Station

Since pumping “first flush” water is only required a few days out of the year, Romtec Utilities can engineer a standard stormwater pump station capable of handling occasional “first flush” conditions. Providing both functions in a single system is a great way to reduce cost for your stormwater management system.

Get Pump Station Notifications Delivered to Your Phone

When a “first flush” event occurs, your pump station is able to provide text messages (or calls and emails) with custom alerts. Our electrical engineers customize your control panel telemetry so that you can monitor your system in the way that works best for you.

Complete As-Built Drawings with O&M Documentation

After your system is completed, commissioned, and tested, Romtec Utilities provides on-site training with O&M documentation for your system. We also supply as-built drawings for your records to ease the future planning with your “first flush” pumping system.

View First Flush Projects

Huntington Beach 400X400
City of Huntington Beach | Industrial Center Stormwater Pumping
1800 GPM | 28.19′ TDH

A new 144,000 square feet, two building industrial center needed a large stormwater pump station to handle the runoff from the site. This triplex system includes a fourth, “jockey” pump to handle low flow dry-season runoff. The three large pumps are 20 hp Ebara submersible pumps designed for redundant pumping during high flow events. A pressure transducer serves as the primary level-sensing device and operates inside of a perforated stilling well designed to prevent solids from interfering with the sensor. The electrical controls are configured with a logic relay, intrinsically safe circuits, and communications.

Seal of the City of Santa Barbara
City of Santa Barbara, California | Dry-Season Stormwater Flows
275 GPM | 17′ TDH

The City of Santa Barbara needed this packaged pump station to manage low stormwater flows from events that occur during the dry season. Duplex submersible pumps capable of passing a 3-inch solid pump the water into an existing sanitary sewer pressure main and on to treatment. This pump station includes an in-ground valve vault with plug and check valves and stainless steel discharge piping to handle oily or contaminated water conditions. Romtec Utilities supplied the complete electrical controls with liquid level sensing, alarm notifications, pump start and stop cycles, above-grade disconnect stand, and intrinsically safe circuits.

City of Brawley
City of Brawley, California | Wastewater Treatment Improvements
1350 GPM | 25′ TDH

The City of Brawley needed this packaged lift station to handle high flows of wastewater at its municipal treatment plant. 12 HP submersible pumps in a duplex configuration were used to meet the high flow pumping needs and a conductive probe was used for liquid level-sensing. The in-ground valve assembly and meter assembly were each located in separate vault structures for a cost effective design and easy access. An outdoor, UL listed control panel was protected from weather and sunlight by a six-post shelter, which also covers the sump entry hatch and electric disconnect panel.

Getting a First Flush Stormwater System



Romtec Utilities provides full engineering and design services to meet the specific goals of your project. Romtec Utilities’ Engineers are experts in water conveyance systems across a wide array of water types and applications. We work with our clients through every step of the process, from preliminary designs and budgetary estimates, submittal and review processes, installation, and all the way through start-up, training, and warranty.


Project Support

With Romtec Utilities you gain the support of our dedicated project management team at every step-from planning through installation. Romtec Utilities covers a vast scope of services that help execute the design, supply, construction, testing, and training of your pump system to ensure its success at the site location.



Romtec Utilities provides a high level of system prefabrication prior to delivery of the system to the jobsite. This greatly reduces construction cost and installation time, as well as potential project delays and change orders. This high level of prefabrication can often reduce installation time from weeks to days. Additionally, Romtec Utilities takes pride in our quality control processes, ensuring that when the system is delivered to the job site everything will function as designed.



Romtec Utilities ensures the quality and success of every pumping system from the early stages of design, all the way through installation and construction. Romtec Utilities will send experienced installation advisors to the site who will advise the installing contractor throughout the installation process providing all parties with the reassurance that the station is constructed and ultimately functioning as designed.



Romtec Utilities’ startup, testing, and training services are essential to the success of any pumping system. Following installation our technicians are on-site working directly with all parties to field check the control panel, operate the pumps, perform system testing, and provide world class training to all maintenance personnel.



With Romtec Utilities, every complete pump station is covered with a standard one-year warranty. Romtec Utilities also provides ongoing support from our entire team throughout the lifetime of our products. This support is provided to ensure that every pump and lift station project is successful.