Filter bracket with backplate for Watts 20,000 gallon in-line water filter (P3700A)

There are two 82 degree countersunk holes for #8 flat-head screws so you can mount this on the wall near your water outlet. Or, use double-sided adhesive tape to mount to your refrigerator. The filter diameter is 2.5", you could probably scale the model up or down to adapt to a different size filter.