The Ecosoft CROSS Solo is a compact, direct-flow reverse osmosis water filtration system designed to provide purified drinking water without the need for a traditional storage tank. Its space-saving design makes it particularly suitable for smaller kitchens, apartments, studios and under-sink installations where cupboard space is limited.

Using a high-capacity 500 GPD reverse osmosis membrane, CROSS Solo delivers a rated flow capacity of up to 1.3 litres per minute (78 litres per hour). Water is purified on demand and delivered directly to the dedicated drinking water tap, eliminating the need for a bulky pressurised storage tank.

The system combines reverse osmosis membrane filtration and carbon post-filtration in one convenient replacement cartridge. Its integrated pump supports operation across the specified inlet pressure range, while automatic membrane flushing and electronic status indicators help simplify everyday operation and maintenance.

Key Features and Benefits

• Tankless direct-flow design: Produces purified water on demand without a conventional storage tank.

• 500 GPD reverse osmosis membrane: High-capacity membrane rated for up to 78 litres per hour under specified conditions.

• Fast water delivery: Rated flow of 1.3 L/min, with a 200 ml glass filled in approximately 10 seconds.

• Compact installation: Measures just 300 × 140 × 200 mm, making it suitable for kitchens with restricted under-sink space.

• Integrated booster pump: Supports operation with an inlet pressure of 1–4 bar.

• 2-in-1 replacement cartridge: Combines the RO membrane and carbon post-filter in one cartridge.

• Automatic membrane flushing: Helps maintain system performance during operation.

• Electronic status indicators: Provide information about system operation and filter condition.

• Leak detection provision: A leakage detector is available for the system; confirm the supplied configuration before installation.

• Water-saving operation: Rated recovery of up to 50%, depending on operating conditions.

How the CROSS Solo Filtration System Works

CROSS Solo uses two filtration stages incorporated into one replaceable cartridge.

Stage 1 – Reverse Osmosis Membrane (500 GPD)

The semipermeable reverse osmosis membrane reduces dissolved substances and a broad range of contaminants in the incoming water. It is the principal purification stage of the system and is responsible for reducing dissolved salts and other impurities.

Stage 2 – Activated Carbon Post-Filtration

The carbon post-filter helps improve the taste and odour of the purified water. It uses coconut-based activated carbon as the final filtration stage.

Both stages are integrated into the same CSVPDRO500 replacement cartridge, allowing the membrane and carbon filter to be replaced together.

Tankless Water Purification on Demand

Unlike conventional domestic reverse osmosis systems that store purified water in a pressure tank, CROSS Solo produces water directly when the dedicated drinking water tap is opened.

Its rated output is:

• Flow capacity: 1.3 L/min

• Hourly capacity: 78 L/h

• Membrane rating: 500 GPD

• Approximate 200 ml glass filling time: 10 seconds

• Water recovery rate: up to 50%

Actual production depends on inlet pressure, water temperature, incoming water quality and the condition of the replacement cartridge.

Compact Under-Sink Installation

With dimensions of only 300 × 140 × 200 mm, CROSS Solo is designed for installations where a conventional RO system and storage tank would occupy too much cupboard space.

The system requires:

• A cold-water supply connection.

• A connection to the household drain.

• A dedicated purified-water tap.

• An electrical supply.

• Suitable inlet pressure and a pressure-reducing arrangement.

The unit is designed for cold tap water only.

Water Quality and Operating Requirements

For reliable operation, incoming water should meet the manufacturer's specified requirements.

Parameter	Manufacturer specification
Inlet pressure	1–4 bar
Optimal operating pressure	3.5 bar
Feed water temperature	+5 to +30°C
Feed water pH	6.5–8.5
Maximum feed water TDS	1,000 mg/L
Maximum hardness	300 mg/L as CaCO₃
Maximum turbidity	3.5 NTU
Free chlorine	Maximum 0.01 mg/L
Maximum iron	0.3 mg/L
Maximum manganese	0.1 mg/L
Electrical supply	230 V, 50 Hz
Water connections	1/2" and 3/8"

A pressure reducer must be installed before the system to protect it from excessive pressure and pressure surges.

If the incoming water does not meet the manufacturer's quality requirements, additional pre-treatment may be necessary. Water from private wells should be tested before selecting and installing the system.

Purified Water Characteristics

Under the manufacturer's stated test conditions, the expected purified-water characteristics include:

Parameter	Indicative value
TDS	5–15 mg/L
pH	5.5–6.5
Calcium	Less than 2 mg/L
Magnesium	Less than 1 mg/L
Sodium + Potassium	Less than 5 mg/L

These values are indicative rather than guaranteed. Actual results depend on feed-water composition, pressure, temperature and operating conditions.

Important: CROSS Solo does not include a mineralisation cartridge. Its reverse osmosis process reduces dissolved minerals, so it is a different proposition from Ecosoft's mineralising PURE Balance systems.

Simple Cartridge Replacement

CROSS Solo uses one combined replacement cartridge:

Ecosoft CSVPDRO500 – 2-in-1 RO membrane and carbon post-filter

The manufacturer recommends replacing the cartridge every 12 months, or sooner if incoming water quality or usage conditions require it.

Signs that replacement may be necessary include:

• Reduced purified-water flow.

• Changes in water taste or odour.

• Increased TDS readings.

• Reduced filtration performance.

The cartridge uses a quick replacement mechanism. After installation, the system must be restarted and flushed according to the manufacturer's instructions before normal use.

Technical Specifications

Specification	Value
Brand	Ecosoft
Model	CROSS Solo
System type	Direct-flow reverse osmosis
Membrane capacity	500 GPD
Rated flow capacity	78 L/h
Rated flow rate	1.3 L/min
Filtration stages	2
Replacement cartridge	CSVPDRO500
Number of cartridges	1 combined cartridge
Storage tank	None
Mineralisation	No
Recovery rate	Up to 50%
Inlet pressure	1–4 bar
Electrical supply	230 V, 50 Hz
Water connections	1/2" and 3/8"
Dimensions (H × W × D)	300 × 140 × 200 mm
System weight	Approximately 4.3 kg
Recommended cartridge replacement	Every 12 months

What's Included

The standard system configuration should be checked against the supplied manufacturer's pack before listing individual accessories as included. The installation documentation describes the system, connection components, purified-water tap, drain connection and power supply arrangements.

Is the Ecosoft CROSS Solo Right for You?

Choose CROSS Solo if you want a compact, tankless reverse osmosis system that delivers purified water directly to a dedicated tap and avoids the need for a conventional storage tank.

It is particularly suitable for:

• Small kitchens and apartments.

• Under-sink installations with limited cupboard space.

• Customers who prefer direct-flow water purification.

• Households looking for a compact alternative to traditional tank-based RO systems.

If you prefer purified water with added calcium and magnesium, consider an Ecosoft PURE Balance reverse osmosis system with mineralisation instead.

Choose Ecosoft CROSS Solo for compact, on-demand reverse osmosis water purification without the storage tank.