COVER SERIES | Wastewater
Designing for the Operator: The Overlooked Keys to Wastewater Reliability
How maintainability, safety and simplified service design help wastewater facilities improve reliability, reduce downtime and support overburdened operators.
Eli Tuttle & Alicia Kadar | SEEPEX
| IMAGE 1: Routine maintenance supports reliable pump operation and equipment longevity. (Images courtesy of SEEPEX)
In wastewater treatment, reliability is often measured in uptime, throughput and process efficiency. Engineers focus on flow rates, solids handling, energy consumption and equipment longevity, all critical metrics in facilities responsible for protecting public health and environmental quality. However, one of the most influential factors in long-term reliability is often overlooked: the experience of the operator maintaining the equipment.
As wastewater systems grow larger and more complex, plant operators face increasing pressure to keep critical processes running with limited downtime and lean maintenance teams. Pumps, grinders, conveyors and dewatering equipment are expected to perform continuously in difficult conditions while handling abrasive, corrosive and unpredictable media.
In that environment, reliability is no longer just about whether equipment can run. It is also about how easily it can be serviced, how safely it can be maintained and how quickly it can return to operation after maintenance is required.
Across the wastewater industry, there is growing recognition that designing for performance alone is not enough. Equipment must also be designed for the people responsible for maintaining it.
Reliability Begins With Maintenance Reality
Every piece of rotating equipment will eventually require service. Wear components must be replaced. Seals will fail. Mechanical adjustments will become necessary. Reliability, therefore, is not simply determined by how long equipment operates before maintenance is needed—it is also determined by what happens when maintenance begins.
In many wastewater facilities, maintenance activities are complicated by cramped layouts, difficult access points, aging infrastructure and limited staffing. A pump that appears ideal on paper can become a major operational liability if technicians must remove pipework, dismantle surrounding systems or work in unsafe conditions just to perform routine service.
This disconnect between equipment performance and maintainability has become more visible as municipalities expand treatment capacity to accommodate population growth and aging infrastructure. Larger plants require higher flows and larger equipment, but maintenance resources often do not scale at the same pace. As a result, wastewater facilities increasingly need equipment designs that minimize service complexity while maximizing operator accessibility.Three factors consistently shape whether maintenance activities become efficient or problematic: time, risk and complexity.
The Hidden Cost of Downtime
In wastewater treatment, downtime affects more than production schedules. When critical systems are offline, municipalities may face treatment bottlenecks, emergency bypass situations, compliance concerns or increased operational strain across the facility.
For operators, service time matters because every additional maintenance step extends the duration of equipment outages. Conventional pump designs often require removal of discharge piping and extensive disassembly before technicians can access primary wear components such as rotors and stators. That process can involve lifting equipment, confined access areas and labor hours.
Maintain-in-place designs help reduce those challenges by allowing service access without removing connected piping systems. By minimizing disassembly requirements, operators can complete repairs more quickly and return equipment to service faster.
The impact of those time savings becomes even more evident in facilities operating continuously with limited redundancy. Reducing maintenance duration by even a few hours can help prevent cascading operational disruptions elsewhere in the treatment process. More importantly, simplified maintenance procedures can reduce the burden on operators who may already be managing multiple systems simultaneously.
Designing for Safer Maintenance
Maintenance safety is another critical but often underappreciated component of wastewater reliability. As equipment sizes increase, so do the physical risks associated with servicing them. Larger pumps involve heavier components, longer assemblies, tighter tolerances and more difficult handling requirements. Without adequate maintenance planning, operators may encounter unsafe lifting conditions, pinch points, restricted access areas or awkward equipment positioning.
In many cases, these risks are not caused by equipment failure itself, but by design decisions made long before installation. For example, a pump installed directly against a wall or beneath a walkway may technically fit within the facility footprint. However, servicing that equipment later can become extremely difficult or unsafe. Operators may discover during maintenance that there is insufficient clearance to remove internal components or maneuver lifting devices safely. This is why maintainability discussions must happen early in the engineering process rather than after installation is complete.
Equipment suppliers, engineers and plant personnel increasingly collaborate during the design phase to evaluate accessibility, lifting requirements and service clearances before systems are finalized. These conversations often occur during preliminary design reviews, when layout adjustments can still be made efficiently and cost-effectively.
That collaborative approach helps prevent long-term operational challenges that might otherwise remain hidden until the first major maintenance event.
Simplicity Improves Reliability
Complexity is another factor that directly influences operator experience and overall plant reliability. In theory, sophisticated systems can deliver impressive performance advantages. In practice, however, excessive maintenance complexity often creates avoidable operational strain.
Operators benefit from equipment that is intuitive to service, requires minimal specialized tools and uses accessible fastening systems and straightforward maintenance procedures. When maintenance activities become overly complicated, repairs take longer and require more expertise, and the likelihood of installation errors or incomplete servicing is increased. Simple design does not mean sacrificing engineering sophistication. Instead, it means applying engineering in ways that reduce unnecessary maintenance burdens.
For wastewater operators, simplicity often translates into confidence. Technicians who understand how equipment functions and how to maintain it effectively are more likely to complete service efficiently and consistently. Familiarity reduces hesitation during critical repairs and helps facilities maintain predictable maintenance schedules.
In contrast, overly complex systems can create frustration and uncertainty. Operators may begin associating certain equipment with difficult service events, prolonged downtime or recurring maintenance headaches.
With time, that perception alone can influence how reliability is calculated within the plant. True operational reliability includes both mechanical performance and operator trust.
Designing With the Operator in Mind
One of the most important shifts occurring within the wastewater industry is the growing emphasis on incorporating operator feedback into equipment and facility design. Historically, equipment selection focused heavily on hydraulic performance, efficiency curves and installation costs. While those factors remain essential, many facilities now recognize that operator usability must also be part of the decision-making process.
Operators understand the day-to-day realities of maintaining wastewater infrastructure. They know where access limitations exist, which systems create recurring maintenance challenges and what types of service procedures consume excessive labor hours. That operational knowledge has become increasingly valuable during early-stage engineering and specification reviews.
In many projects, equipment manufacturers and engineering firms now participate in design discussions long before installation begins. Preliminary layouts, service clearances, maintenance access requirements and lifting considerations are evaluated alongside performance specifications.
This collaboration allows engineering teams to identify potential maintenance obstacles early and recommend alternative configurations when necessary. In some cases, that may involve changing equipment orientation, modifying piping arrangements or selecting alternative drive configurations to improve service accessibility within tight footprints.
These design conversations are especially important as treatment facilities continue expanding capacity within existing sites where available space is often limited. The earlier maintainability is considered, the easier it becomes to avoid costly operational compromises later.
| IMAGE 2: Sludge handling is a critical step in wastewater treatment.
Reliability Can Be Psychological
There is also a human dimension to wastewater reliability that is rarely discussed in technical specifications. Operators develop strong perceptions about equipment based on their maintenance experiences. Systems that are difficult to service, require excessive downtime or create recurring frustrations often become associated with operational anxiety. Conversely, equipment that is accessible, predictable and manageable tends to build operator confidence.
That confidence matters. Reliable equipment should not create hesitation every time maintenance is required. Operators should feel prepared—not overwhelmed—when servicing critical systems. In many ways, the best-designed equipment is not necessarily the most technologically advanced. It is the equipment that operators trust because it consistently performs and remains manageable throughout its service life.
As wastewater infrastructure demands continue to increase, the industry’s understanding of reliability must evolve beyond mechanical durability alone. Reliability now includes maintainability, accessibility, operator safety and service efficiency. The facilities that succeed long term will likely be those that recognize maintenance personnel not simply as end users, but as essential stakeholders in the engineering process.
Ultimately, the true measure of reliable equipment is not just how well it runs when everything is working perfectly. It is how effectively operators can maintain it when real-world conditions are anything but perfect.
Eli Tuttle is an applications and control systems engineer for SEEPEX, an Ingersoll Rand Business. He holds a degree in manufacturing technology management and has more than 10 years of experience in pump applications, controls and process engineering. He may be reached at eli.tuttle@irco.com.
Alicia Kadar is the marketing manager for SEEPEX, an Ingersoll Rand Business, supporting the North American and Canadian markets. She holds a bachelor’s degree in public relations and advertising and has more than 16 years of experience in manufacturing marketing and communications. She may be reached at alicia.kadar@irco.com. For more information, visit seepex.com.
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