The VPS-203 is designed for whole-house water treatment projects where a compact 8 GPM system may not provide enough capacity during periods of simultaneous water use.

With a rated UVC treatment flow of 45 L/min (12 GPM) at 30 mJ/cm², two 20" × 4.5" Big Blue filter housings, and a 50W UVC LED reactor, the VPS-203 is positioned for larger residential properties, villas, multi-bathroom homes and selected light-commercial point-of-entry applications.

Rather than simply increasing filtration stages, the VPS-203 focuses on two practical requirements:

Higher Peak Flow + Greater Filter Capacity

BUILT FOR HIGHER PEAK WATER DEMAND

Whole-house systems should be selected according to peak simultaneous demand, not only average daily water consumption.

A household may consume relatively little water over the course of a day but still require a much higher instantaneous flow when several fixtures operate at the same time.

For example:

Two showers running simultaneously

Shower + kitchen faucet

Washing machine + bathroom use

Multiple bathrooms in use

Irrigation or utility fixtures operating together

For these projects, the VPS-203 provides:

45 L/min / 12 GPM at 30 mJ/cm²

This gives system designers more capacity for larger residential installations than compact 8 GPM whole-house systems.

WHERE VPS-203 FITS BEST

VPS-203 is especially suitable for projects such as:

Large Residential Homes

Homes with several bathrooms can experience short periods of high simultaneous water demand.

The 12 GPM treatment capacity provides more flexibility when multiple fixtures are operating.

Villas

Villas often combine:

Multiple bathrooms

Large kitchens

Guest rooms

Laundry areas

Outdoor water-use points

For these applications, a larger whole-house treatment platform can be more appropriate than a compact entry-level system.

Holiday Homes & Rental Properties

Vacation homes, Airbnb-style properties and guesthouses can experience unpredictable peak water use when several guests use bathrooms or showers at the same time.

VPS-203 provides a higher-flow treatment platform while retaining a relatively simple residential-scale installation.

Private Well Water Systems

For appropriately pretreated well water, VPS-203 can provide the final combination of:

Sediment Filtration → Carbon Filtration → UVC LED Disinfection

Additional pretreatment may be required where iron, manganese, hardness or turbidity exceeds recommended limits.

Selected Light-Commercial Applications

VPS-203 may also be used in selected small commercial projects where calculated peak flow remains within the rated treatment capacity.

• Typical examples may include:
• Small offices
• Staff facilities
• Clinics
• Small guesthouses
• Small workshops
• Similar low-to-moderate demand applications
• Final selection should always be based on actual peak flow.

Single-Family Home

Estate Home

Chalet

Guesthouse

WHY 20-INCH FILTERS MATTER

The main mechanical difference between VPS-203 and compact whole-house systems is the use of:

2 × 20" × 4.5" Big Blue Filter Housings

The advantage of the larger housing is not simply physical size.

It provides more space for filtration media and contaminant loading.

Higher Dirt-Holding Capacity

A larger sediment cartridge can retain more suspended solids before reaching its service limit.

This can be beneficial where incoming water contains:

Fine sediment

Rust

Sand

Silt

Pipe debris

Greater Carbon Media Volume

The larger carbon cartridge provides more carbon media than a comparable 10-inch cartridge.

This makes the 20-inch platform more appropriate for higher water consumption applications.

More Suitable for Higher-Flow Installations

As household demand increases, filtration capacity becomes increasingly important.

A small cartridge may technically pass the required water volume but can create higher pressure loss or require more frequent servicing under heavy use.

The 20-inch format gives designers more flexibility for higher-demand whole-house projects.

FLOW RATE VS UVC DOSE

The available treatment flow changes according to the required UVC dose.

For residential drinking-water projects, the required UVC dose should be established before the system is selected.

A system should never be selected only by its highest published flow rate.

The correct selection should consider:

Required Dose + Peak Flow + UVT + Turbidity + Water Quality

WHY PRE-FILTRATION MATTERS BEFORE UVC

UVC LED performance depends heavily on the optical quality of the incoming water.

Particles and certain dissolved contaminants can interfere with the transmission of UVC energy.

For this reason, the VPS-203 places physical filtration before the UVC LED reactor.

Recommended incoming water conditions include:

If the source water exceeds these conditions, additional pretreatment may be required.

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