WSP Whole House Reverse Osmosis System - Commercial, 4x40"

Water Softener Plus’s WSP Whole House Reverse Osmosis System uses a powerful 4x40" membrane setup to help reduce dissolved solids, salts, chlorine, sediments, and other contaminants in your drinking or process water. It’s designed to provide consistent filtration for a household drinking-water supply, offering reliable purification without fuss.

The first sign your plumber will notice

When a plumber inspects your water supply, one detail stands out: mineral deposits, or scale, building up around fittings and fixtures. These white or cloudy spots often mean your water contains a high level of dissolved solids—like salts and minerals—that affect taste and performance. You may also notice a chemical smell or taste, especially chlorine, which can linger in tap water. These details go beyond surface stains; they signal water that may need more thorough treatment than typical filters provide.

How the control head manages your water treatment

The system’s control head is the brain of your reverse osmosis setup. It automatically manages the feed water, flush cycles, and shutoff to keep the membranes working efficiently without wasting water. The control panel interface lets you monitor operation and adjust settings as needed. This ensures the system maintains consistent filtration, reducing dissolved solids while minimizing maintenance and downtime.

The media inside that does the filtering

At the heart of this system is the thin-film composite reverse osmosis membrane. This membrane works by pushing water through a fine barrier that blocks dissolved solids, salts, chlorine, and many other contaminants. The membrane targets particles far smaller than sediment filters catch, making it effective at improving taste and reducing total dissolved solids, or TDS. This focused filtering is why you notice clearer water with less chemical taste.

The tank and how much water it holds

This system comes with a specially sized vessel to house the membranes and manage flow, but exact tank dimensions vary depending on your setup. When you order, we’ll confirm the appropriate size for your household’s water needs. The design supports a steady flow of treated water for drinking and cooking without slowing your supply or causing pressure drops.

Who this whole house system suits best

This reverse osmosis system is built to handle the drinking-water demands of a typical household. It’s ideal if you’ve noticed issues with dissolved solids affecting water taste, or if your water contains sediment and chlorine you want to reduce before drinking or cooking. While it performs well for most families, if your water demand is very high or you have unusual water chemistry, it’s wise to check your flow rate and specific test results with our experts to ensure the system can meet your needs fully.

What you get when you order

When you choose this system, you receive the complete reverse osmosis unit ready for installation by your licensed plumber. It includes the control head that manages all cycles and the four high-capacity 40" RO membranes housed in the appropriate vessel. We ship from Tampa with free U.S. delivery included in the price. We do not include a bypass valve or discharge hose, so your plumber can fit it to your plumbing as needed. Installation and service manuals come free with your order.

What to do next

If you’re ready to reduce dissolved solids and improve your household’s water taste with a reliable, professionally designed reverse osmosis system, order online today. Our team stands ready to help you confirm sizing and answer questions. Free shipping within the U.S. is included, and your purchase is backed by our 90-day money-back guarantee.

Who this size is right for

What you are buying here is a drinking-water or process system, sized by daily output rather than by the number of bathrooms.

We do not publish a fixed capacity for this item, and we would rather size it on your numbers than guess: send us your peak flow rate in gallons per minute and a water test, and we will confirm the right size before you order.