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Instapure under sink filters are standard 10 inch filters and can be replaced with standard cartridges and may also be called Waterpik.
 

Instapure Under Sink Filters Product List:


FiltersFast FF10S-5 Replacement For WaterPik IR-20
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Ships in 1 business day

Retail: $8.99

As Low As: $4.95

Save 45%!

FiltersFast FF10C-5-AP Replacement For WaterPik IR-10A Filter
In Stock!
Ships in 1 business day

Retail: $16.99

Our Price: $11.99

Save 29%!