• For water conditions under 500 ppm TDS
  • Maximum operating pressure: 65 PSI
  • 150 gallons per day
  • NSF compliant materials
Special Order

Some items on our website are not normally stocked in our warehouses. These items are marked "Special Order"
underneath the price on the item's page.

Please understand that Special Order items may not be able to ship within 1 business day like our regularly-stocked items.
Some may be shipped directly from the manufacturer. Others might have to be ordered into our warehouse with the next order
from that manufacturer and then shipped to you; this could take up to several weeks.

As a result, we urge you to contact us if you have questions about the delivery time of a Special Order item you wish to order.

Please note - we are not always able to cancel special order items once the order is placed. These items may also be non-returnable. Please contact us if you have any questions before ordering this item.

MFR Item:
UPC Code:

Companion Items

Width 11 Inches
Height 16 5/8 Inches
Filter Type Scaling
Filter Type Sediment
Filter Type Taste
Maximum Pressure 65 PSI
Maximum Temperature 100 Degrees F
Service Flow Rate 150 GPD
Stages 4 Stage
Type Filtration Systems


This 3M Cuno STM150 ScaleGard Plus 2 reverse osmosis water filtration system reduces sediments, odors, and chlorine taste in your water while also minimizing scale-causing mineral buildup in boiler based steamer applications! It is uniquely designed for operation in water conditions with under 500 ppm Total Dissolved Solids (TDS).

The system's membrane is designed to reject over 96% of minerals that cause scale buildup and equipment problems, while activated carbon and graded density pre-treatment helps to protect the membrane itself. To give your water a final polish, the 3M Cuno STM150 reverse osmosis water filtration system also includes post-treatment filtration to keep your water tasting great at a 150 GPD capacity.

The 3M Cuno STM150 ScaleGard Plus 2 reverse osmosis water filtration system boasts a compact construction and a stainless steel bracket that allows it to be mounted in tight spaces. An integrated booster pump and a built-in bypass solenoid provide consistent water flow to reduce downtime.

This filtration system has a Sanitary Quick Change (SQC) encapsulated cartridge design that reduces the risk of contamination during change-outs. The membrane cartridge has a maximum 2-4 year change-out, while the rest of the cartridges have a maximum 6 month change-out. The 3M Cuno STM150 filtration system comes equipped with 3/8" NPT connections and is NSF compliant.

Overall Dimensions:
Width: 11"
Height: 16 5/8"

This item is not eligible for shipment outside of the contiguous United States.

Because this item is not stocked in our warehouse, processing and transit times will vary. If you need your items by a certain date, please contact us prior to placing your order. We cannot guarantee that this item can be cancelled off of the order once it is placed.


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