MRO Field Guide

Process Filtration 6-Pack Water Filters vs. WSS Water Treatment System: Which Filtration Buy Is Right?

Choosing between a $49.99 six-pack of water filters and a $6,000 used commercial reverse osmosis system comes down to your scale. Here's how to decide.

Last updated Aug 17, 2026

Choosing between these two filtration separation products is a question of scope. One is a six-pack of individual water filters; the other is a water treatment system. The right pick depends entirely on whether you need filter cartridges or a complete treatment process.

Quick verdict

If you need filters to keep an existing setup running, the Process Filtration six-pack is the no-surprises choice. If you need a complete water treatment system, the WSS unit is the one that does the heavy lifting. The real difference is between buying consumables and buying equipment.

At a glance

ComparisonProcess Filtration 6-PackWSS Water Treatment System
Listed price$49.99$6,000.00
Price indicator
ConditionNew - Open boxUsed
What's includedSix water filter cartridges with part number 3P879 and T15R10ACommercial reverse osmosis system with Chem-Tainer tank and Qilipsu Waterus filtration
Best forRestocking filter inventoryIndustrial water treatment at scale

Where each product wins

The Process Filtration six-pack wins on price, simplicity, and quantity. It's a compact purchase that gives you multiple filters under one reference, which is helpful if you already use this cartridge. The set is specific, so if it matches your existing setup, the decision is straightforward: buy the set and keep the extras on hand. It's a self-contained filter purchase.

The WSS Water Treatment System wins on capability. It's a complete water treatment system, not a box of filters, and it's designed for manufacturing and production environments. It brings together a tank, filtration, and other specialized equipment under one product name, so you're not assembling a system from separate pieces.

Product notes

Process Filtration - P/N: 3P879 - T15R10A - Water Filter - QTY. (6) - NEW

Process Filtration - P/N: 3P879 - T15R10A - Water Filter - QTY. (6) - NEW

The Process Filtration set gives you T15R10A water filters with part number 3P879, and they're in new open-box condition. The set also comes from the United States, which is a useful detail for buyers who prefer domestic parts. What you see is the filter cartridges themselves, so the set covers the filter side of the job but not the broader filtration setup. If you need to keep a steady supply of cartridges on hand, this is the compact, low-maintenance buy: open the box, store the filters, swap as needed. Just remember the open-box condition.

WSS Water Treatment System Chem-Tainer Tank Qilipsu Waterus Filtration

WSS Water Treatment System Chem-Tainer Tank Qilipsu Waterus Filtration

The WSS Water Treatment System is a complete industrial solution. It's a used treatment setup that joins a Chem-Tainer tank with Qilipsu Waterus filtration and additional specialized equipment. This is designed for manufacturing and production environments where water must meet specific quality standards. The unit's strength is scope: instead of buying individual cartridges, you're getting a full treatment train in one system. The real trade-offs are the used condition and the scale. This isn't a desktop filter or a home appliance; it's equipment sized for industrial processes. If you're building out a water treatment line, this gives you tanks, filtration, and process integration in one package. If you only need filter cartridges, though, it's far more than you're asking for.

Final choice by use case

If your goal is to maintain an existing water line, the Process Filtration filter set at $49.99 is the practical pick: it covers the filter side of the job. If your goal is to establish or replace a commercial reverse osmosis system, the WSS Water Treatment System at $6,000 is the one that delivers industrial-scale filtration separation. Choose the filters when cartridge stock is the bottleneck; choose the WSS unit when the whole treatment process is the job.

Products in this article
Process Filtration - P/N: 3P879 - T15R10A - Water Filter - QTY. (6) - NEWUSD 49.99View on eBayWSS Water Treatment System Chem-Tainer Tank Qilipsu Waterus FiltrationUSD 6,000.00View on eBay
Process Filtration - P/N: 3P879 - T15R10A - Water Filter - QTY. (6) - NEWUSD 49.99View on eBayWSS Water Treatment System Chem-Tainer Tank Qilipsu Waterus FiltrationUSD 6,000.00View on eBay

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