How to choose UV treatment for pools and spas

Choose a UV system based on the treatment design: actual flow rate, water quality, hydraulic integration, control, and maintenance.

In a system for a public pool or spa, comparing only power and price leaves essential information unclear. The reactor must operate within the installation conditions, within the limits defined by the manufacturer. The purchase should include the equipment, assembly, control, and assistance, so the person in charge can monitor its operation over time.

UV is part of a treatment set

UV radiation acts on the water passing through the equipment and does not leave a residual disinfectant in the pool. World Health Organization guidelines for swimming pools explain the integration of UV with filtration and residual disinfection. Do not interpret the purchase of UV as authorization to eliminate the chemical monitoring of the pool.

Turbidity and deposits influence the passage of radiation. Therefore, filtration, water quality, and system cleaning are part of the selection and operation. The objective must be defined in the project: for example, to complement treatment and manage compounds such as chloramines under the documented conditions of the equipment.

Data required to compare proposals

  1. Usage: public pool, private installation, or spa; identify volume, occupancy, and expected schedules.
  2. Actual flow rate: record the design flow rate and operating regimes. The volume of the pool alone does not size the reactor.
  3. Water quality: gather the necessary parameters for the manufacturer, including data relevant to UV transmission and turbidity.
  4. Working conditions: temperature, pressure, materials, and water characteristics must respect the limits of the reference.
  5. Objective and performance: ask for the specification that relates flow rate, water conditions, and UV dose. Electrical power is not, in isolation, proof of disinfection performance.
  6. Monitoring: confirm sensors, alarms, logs, and connection to the other equipment.

Ask that the proposal identify the conditions used in the selection and the documents that support them. If water or flow rate data are missing, clarify them before choosing between models. An efficacy percentage published for another piece of equipment cannot be attributed to the product you are purchasing.

Medium pressure UV: confirm the complete reference

Norte Pool presents a MP-UV system for public pools and spas. The commercial data sheet must be complemented by the brand, exact reference, technical documentation, and configuration proposed for the installation. Confirm whether manual or automatic cleaning, accessories, and control are part of the supply or are options.

As an example of manufacturer documentation, AstralPool describes the Heliox UV MP range for public pools and publishes its manual. This documentation shows the type of information to request regarding control and operation. It does not automatically identify Norte Pool's product as a Heliox, nor does it transfer materials, flow rates, certifications, or performance numbers to it.

Hydraulic and electrical integration

Confirm with the designer the position in the circuit, connections, maintenance space, insulation conditions, and instrumentation. The person in charge must plan how the system reacts to a lack of flow, a breakdown, and a stoppage of circulation. The protections and procedures must correspond to the manual of the selected model.

Also define the integration with filtration and control and dosing. UV does not automatically compensate for an inadequate filter or poor circulation. For saltwater or special conditions, request written confirmation of the compatibility of the reference and accessories.

Maintenance and cost over time

  • Consumables: obtain references for lamps, quartz sleeves, seals, and applicable sensors.
  • Access: confirm the space required for the replacement and cleaning of components, in addition to the external dimensions of the reactor.
  • Routine: request the inspection, cleaning, and verification plan defined by the manufacturer, with the planned logs.
  • Assistance: clarify the availability of parts, technical support, and warranty conditions.
  • Costs: compare acquisition, installation, energy, consumables, and maintenance under the expected conditions of use.

Intervention on lamps and components requires the safety and isolation procedures in the manual. Do not operate the system when open, nor improvise radiation exposure tests. This guide serves to prepare for selection and the request for proposals, not to replace specialized installation or maintenance.

Purchasing errors to avoid

  • Selecting only based on the advertised watts.
  • Applying flow rates or efficacy from a different range.
  • Ignoring water quality and prior filtration.
  • Counting on an optional accessory without including it in the proposal.
  • Confusing foreign documentation with full confirmation of installation requirements in Portugal.

Frequently asked questions

Does UV allow for dispensing with chlorine or bromine?

It does not leave a residual disinfectant in the pool. Integration with the treatment and the control plan must be defined by the technical manager.

Is knowing the volume of the pool enough?

No. Flow rate, water quality, operating conditions, and treatment objective are necessary for selection.

How do I request a comparison from Norte Pool?

Send the type of installation, volume, flow rate, available analyses, and circuit diagram. Request the complete reference, the selection conditions, and the scope of the supply.

Consult the Norte Pool guide center and request support with the reference and installation data.

Consulted documentation

Back to blog