Wondering how to find out your system's model and serial number? Here's where you can find them and how to interpret them.
How to Interpret Your Serial Number
Your water softener's serial number includes two important pieces of information - the model and date of manufacture. You can use the date of manufacture to tell how old your system is. The serial number text is small and may be hard to see. It may be helpful to use your phone and take a picture of the serial number and then zoom in to see the numbers. Your information may appear differently on the sticker decal depending on the age of your unit. Here are a few examples and how to read them:
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Where to Find the Model & Serial Number?
Click on your system below.
Undersink Filtration
Depending on the model, you can find your serial number under the top cover or on the outside of the housing.
Water Softeners
Depending on the model and age of your softener, the serial number will be located either on the back of the top cover near the plumbing connections, or on the inside rim below the salt lid hinges (pictured).
Central Water Filtration System
You can find your serial number on the back of the top cover, above the plumbing connections.
Tank Filter
You can find your serial number on the back valve head cover. The picture below shows it being towards the top, however, yours may be more toward the middle or bottom area.
Model / Part Number Reference Chart
| Part number | Model |
| 7366431 | NST30ED |
| 7366449 | NST45ED1 |
| 7366457 | NST70ED1 |
| 7340794 | NSCCTOSSA |
| 7263146 | NSANSSA |
| 7263154 | NSAPFSSA |
| 7263104 | NSAPFXLA |
| 7336127 | NSAIV-10 |
| 7336630 | NSAIV-12 |
| 7356127 | IOAPF-10 |
| 7356119 | IOAPF-12 |
| 7358179 | NSWHCW |
| 7287695 | NSRO42C4 |
| 7358187 | NSDW500 |
| 7358276 | NSDW300 |
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