800GPD Tankless RO Water Purifier Under Sink Reverse Osmosis System PCB RO Filtration Drinking Water Filter

Product Overview

The 800G Tankless RO Water Purifier is a next-generation 800GPD tankless reverse osmosis water purifier designed for permanent under-sink installation in residential and light commercial kitchens. Eliminating the bulky storage tank of traditional RO systems, this system delivers up to 2 liters per minute of purified drinking water on demand — filling a glass in seconds, a pot in under a minute.

At the core of this RO Water Purifier is a dual-core filtration system combining a high-capacity PCB composite pre-filter and a precision 0.0001-micron RO membrane. Together they remove sediment, rust, chlorine, organic compounds, heavy metals, dissolved solids, bacteria, and viruses — delivering water that is clean, safe, and great-tasting straight from the tap.

Built with an integrated water-electricity separation architecture, smart pure water reflux technology to eliminate stale water, and a tool-free quick-release filter mechanism, this purifier is engineered for safety, convenience, and years of reliable daily service.

How It Works

PCB Composite Pre-Filtration

Incoming tap water first passes through the multi-layer PCB composite filter cartridge. This stage physically captures sediment particles, rust flakes, and suspended solids while activated carbon media adsorbs residual chlorine, unpleasant tastes, odors, and organic compounds. Pre-filtration protects and extends the service life of the downstream RO membrane.

0.0001 Micron RO Membrane Filtration

Pre-filtered water is pressurized through an 800GPD-rated reverse osmosis membrane. With a pore size of just 0.0001 microns — approximately 1/500,000 the width of a human hair — the RO membrane effectively rejects dissolved salts, heavy metals (lead, mercury, arsenic, cadmium), TDS, bacteria, viruses, and other microscopic contaminants. Only pure water molecules pass through.

Pure Water Reflux Circulation

During idle periods, the system automatically initiates a pure water reflux cycle that circulates purified water backward through the RO membrane. This prevents TDS creep and bacterial growth inside the membrane housing, ensuring the very first glass of water after hours of non-use meets the same purity standard as water drawn during continuous operation.

Direct Flow to Faucet

Purified water flows directly to the dedicated drinking water faucet without intermediate storage. The tankless design eliminates the risk of secondary contamination from stagnant tank water and the plastic taste often associated with stored RO water.

Product Specifications

Key Advantages

Why Choose This RO Water Purifier Over Conventional RO Systems

No Tank, No Compromise

Traditional RO systems rely on a 3-5 gallon pressurized storage tank that consumes substantial cabinet space and creates a reservoir where bacteria can multiply over time. This tankless direct-flow design eliminates the tank entirely — providing more storage space for your kitchen and fresher water with every pour.

Dual-Core Efficiency

The two-cartridge system is simpler to maintain than multi-stage systems with 3-5 separate filter housings. Fewer cartridges mean fewer replacements to track, lower annual maintenance costs, and quicker filter changes when needed.

Family-Ready Performance

Rated at 800GPD with a 2L/min flow rate, this purifier comfortably serves households of 4-8 people — handling simultaneous demands for drinking, cooking, coffee brewing, and pet water without slowing to a trickle.

Smart Water Management

The pure water reflux function and 65 percent efficiency rating represent significant engineering advances over first-generation tankless RO systems. Less water wasted, fresher tasting water, and longer membrane life — all automatically managed without user intervention.

Target Customers

Health-conscious families — Comprehensive contaminant removal for safe drinking and cooking water that children and elderly family members can rely on daily.

Apartment and condominium residents — Compact tankless footprint maximizes limited under-sink storage while delivering full-size RO system performance.

Kitchen renovators and home builders — Modern under-sink design with included faucet adds visible value to kitchen upgrades. Popular specification for mid-to-high-end residential projects.

Bottled water users seeking an upgrade — Unlimited purified water on demand at a fraction of the per-liter cost of bottled water delivery. Eliminate lifting, storing, and returning heavy water bottles.

Small offices and commercial kitchens — 800GPD capacity supports moderate commercial demand for coffee machines, ice makers, and food preparation requiring purified water.