Modular Water Pretreatment Solutions for Data Centers
Drop-In Water Purity for Data Centers Anywhere
Data center cooling depends on water purity as much as it depends on flow and pressure. Coolant Distribution Units (CDUs) circulate makeup water through tight-tolerance heat exchangers and cold plates, where scale, hardness, and dissolved solids from typical city water can foul components and degrade cooling performance over time. HVAC contractors building out liquid cooling infrastructure need a reliable source of high-purity water that’s ready to go the moment the site is, whether that site has full utility access or none at all.
Riveer’s answer is a modular reverse osmosis (RO) skid, pre-built and factory tested inside a standard ISO container. Rather than engineering a one-off system for every project, these plug-and-play modules arrive ready to connect to power, water supply, and discharge piping, so HVAC contractors can drop a fully functional pretreatment plant into a data center build site, including remote locations like the desert, without waiting on a custom mechanical room to be built around it.
Pre-Built RO Modules, Ready to Drop In
A modular, container-housed approach solves a problem that fully custom-engineered systems can’t: speed and predictability. Every skid ships as a complete unit, pre-piped and pre-wired inside its ISO container, with membrane selection, pre-filtration, controls, and storage already integrated and factory acceptance tested (FAT) before it ever leaves for the job site. The battery limits, the defined connection points between the skid and the site, are simple by design: feedwater inlet, product-water outlet, concentrate/reject drain, and electrical supply. That means HVAC contractors can specify a standard module size against a known footprint and lead time, connect at those battery limits, and move straight into site acceptance testing (SAT) rather than designing a mechanical room around a system that hasn’t been built yet.
Standard plant sizes cover 2, 6, 10, 12, and 20 GPM, with membrane options in 98% or 99.5% salt rejection, tape-wrapped or fiberglass-wrapped, and fiberglass or stainless steel housings. Because the entire pretreatment train, sediment filtration, carbon filtration, water softening, the RO feed buffer tank, and the Grundfos stainless steel RO filter pump with integrated VFD options, is built and tested inside the container at the factory, on-site work is largely limited to setting the skid and making the final connections at those battery limits. Custom sizing is still available for projects with unusual load requirements, but the modular platform is the primary way Riveer is bringing these systems to market for data center work.
Where Riveer’s Modular RO Systems Are Used
- Remote and off-grid data center builds: desert sites and other locations without existing utility or mechanical infrastructure
- Coolant Distribution Unit (CDU) makeup water: high-purity water for direct-to-chip and rear-door liquid cooling loops
- Auxiliary power system cooling: makeup water for generator and backup power cooling loops
- Data center HVAC systems: supporting piping and mechanical systems that require low-conductivity, low-hardness water
- Fast-track and modular data center construction: projects where a pre-built module can go in ahead of, or in place of, a custom mechanical room
Related Systems & Capabilities
Inlet Water Treatment Skid
Modular RO Water Treatment FAQs
What is a modular RO water treatment system for data centers?
A modular RO system is a complete reverse osmosis and pretreatment plant pre-built and factory tested inside a standard ISO container. Rather than being engineered and assembled on-site, the module ships ready to connect to power, water supply, and discharge piping, so it can be operational shortly after it’s placed.
Can these modules be deployed to remote or desert data center sites?
Yes. Because the entire system is self-contained and factory tested before shipment, these modules are built to be dropped into locations with limited existing infrastructure, including remote desert sites, without requiring a custom mechanical room to be built first.
What size modules are available?
Standard module sizes are 2, 6, 10, 12, and 20 GPM, with custom sizing available for projects with unusual flow requirements.
What water quality do the modules produce for CDU makeup water?
The modules are designed to produce product water with less than 10 µS/cm conductivity, 0 ppm hardness, and 0 ppm chlorine, starting from typical city water in the 300–500 µS/cm conductivity range. Post-polishing DI systems are available for applications that need additional purity.
What are the "battery limits" for a modular RO skid?
Battery limits are the defined connection points between the RO skid and the rest of the site: the feedwater inlet, the product-water outlet, the concentrate/reject drain, and the electrical supply. Because a modular skid is fully built and tested before it arrives, on-site work is largely limited to making the connections at these battery limits rather than constructing the system in place.
What's the difference between FAT and SAT for an RO skid?
Factory acceptance testing (FAT) happens before the skid ships, verifying the system performs to spec at the factory. Site acceptance testing (SAT) happens after installation, confirming the skid performs correctly once it’s connected to the site’s actual feedwater, power, and discharge conditions.
Is a custom-engineered system still available if a standard module doesn't fit the project?
Yes. While the modular, container-housed platform is the primary way these systems are brought to market, custom sizing is available for projects with requirements outside the standard module range.
Does Riveer support and service these modules after installation?
Yes. Maintenance and service contracts are available, along with 2-year and 5-year spare parts kits, and systems with PLC/HMI controls support remote monitoring.
Get Started With a solution
Deploy a turnkey modular RO system anywhere your data center build takes you. Share your project’s water source, flow requirements, and site location, and we’ll reach out to discuss a solution.