The cost you’re not measuring. How best-in-class efficiency minimizes total cost of ownership

When the cheapest pump becomes the most expensive decision

If your procurement team is evaluating pump equipment on upfront price alone, you are measuring the wrong number.

We understand the pressure. Procurement cycles are driven by budget visibility, and the capital price of a pump is the easiest number to act on; it sits right there on the quotation. Everything else: the energy it will consume across thousands of operating hours, the maintenance it will require, the carbon it will generate stays hidden in the future. And yet for most high-runtime pumping applications, energy dominates lifetime spend by a ratio that can make the initial purchase price almost irrelevant to the total equation.

The trap is familiar: select the equipment with the lowest CAPEX, and quietly lock in years of avoidable operating expenditure. Together, we can change that.

What drives the real cost of a pump

A pump does not cost what you pay for it. It costs what it consumes across its operational life.

When pumping systems are not optimised (oversized duty points, fixed-speed operation, poor hydraulic matching to the actual load profile) every hour of operation is an hour of unnecessary electricity spend. The inefficiency is not dramatic. It doesn’t announce itself. It compounds quietly across tens of thousands of operating hours, accumulating in your energy bills and your carbon reports.

Here is what that looks like in practice. Consider a pump running 8,000 hours per year, a realistic figure for continuous-process applications in leisure, commercial building services, or light industrial settings. At a UK commercial electricity tariff of £0.25 per kWh, the difference between a well-matched, high-efficiency pump and a legacy fixed-speed unit can represent thousands of pounds in annual operating cost, per pump. Across a system with multiple pumping points, that gap becomes transformative.

The methodology is straightforward: model how the pump operates across its actual load profile, calculate average input power weighted by time at each operating condition, then translate that into annual electricity consumption, cost, and carbon. The inputs: runtime, tariff, load distribution are knowable for almost any application. What’s needed is the willingness to ask for the comparison.

That is exactly what we do, working alongside our customers to build the business case before a specification decision is made.

From analysis to action: working alongside FT Leisure

This is not a theoretical framework. It is what we did, together with FT Leisure, a UK-based OEM customer serving the refurbishment and leisure market, when their team was evaluating pump upgrades across a series of existing installations.

Working with Andy Murphy, Refurbishment Solutions Manager at FT Leisure, our Xylem team conducted a full ROI and emissions comparison between the existing non-optimised pumping solution and a proposed upgrade using Lowara’s NSCSX high-efficiency centrifugal range:

• 2 × Lowara NSCSX 125-250/110/404CCZ
• 2 × Lowara NSCSX 100-200/75/404CCZ

These units were selected not simply for their efficiency ratings, but for their hydraulic fit to the application ensuring the duty point alignment that makes the efficiency figures real, not theoretical.

The results

Using 8,000 annual operating hours and the prevailing UK commercial electricity tariff (£0.25/kWh), the analysis delivered a clear picture of the value at stake:

Lowara NSCSX 125-250/110/404CCZ

• Annual electricity cost saving: ~£11,467
• Maintenance cost change: -£1,800/year
• Net total annual saving: ~£9,667
• Annual emissions reduction: ~8,898 kg CO₂e
• Payback period: ~8 months

Lowara NSCSX 100-200/75/404CCZ

• Annual electricity cost saving: ~£10,893
• Maintenance cost change: -£1,800/year
• Net total annual saving: ~£9,093
• Annual emissions reduction: ~8,453 kg CO₂e
• Payback period: ~7 months

Taken together, the two upgrades deliver gross electricity savings of over £22,360 per year, and a combined net total saving exceeding £18,000 per year once all cost changes, including maintenance, are accounted for. That is the number that matters: a conservative, all-costs-included figure that holds up to scrutiny in any procurement or finance review.

Across both pump sets, the upgrade also delivers a combined emissions reduction approaching 17,350 kg CO₂e per year, operational carbon savings that map directly to Scope 2 reporting progress for FT Leisure’s end customers.*

The payback timescale (measured in months, not years) fundamentally reframes what an “upgrade” means for a procurement conversation. The capital investment in the right equipment repays itself before the first year of operation is complete.

Procurement can lead the change

The lesson from the FT Leisure project is replicable across virtually any high-runtime pumping application; whether you are managing a leisure facility, a commercial building, an industrial process, or a water supply installation.

The shift is straightforward: require lifecycle comparisons, not just upfront quotations. Build the comparison on clear, verifiable assumptions like annual runtime, actual electricity tariff, real operating load profile and the right answer becomes visible. You do not need to take our word for it; you need the data.

And the data, in our experience, consistently points in the same direction: energy is the dominant cost driver, efficiency is the fastest route to lower lifetime cost and lower emissions, and the systems best positioned to deliver those outcomes are those specified with hydraulic fit in mind from day one.

This is where we can work together. Our team is equipped to conduct the same analysis for your installations, quantifying the gap between your current performance and what optimised Lowara technology can deliver, presented as a business case your finance team can act on.

The question is not whether upgrading makes financial sense. For most high-runtime applications, the analysis tells you it does. The question is: how long are you prepared to wait before you see the evidence?

Let’s run the numbers for your operations

We work alongside utilities, OEMs, building services engineers, and facility managers every day to replace assumptions with data and upfront price with total value.

If you have an existing pumping installation and want to understand what optimised Lowara technology could deliver in energy savings, payback, and carbon reduction, contact your Xylem account team to request a lifecycle comparison for your application.

^{* Carbon calculations are based on operational Scope 2 emissions using the IEA UK grid emissions factor (0.194 kg CO₂e/kWh). Embodied carbon is not included in this analysis. Savings are based on the operating parameters detailed above; actual results will vary depending on site-specific conditions, runtime profile, and prevailing energy tariffs.}