The Tier1 CT-S-1000 Countertop Water Filtration Housing Unit is here to rid you use expensive bottled water, and bring you filtered water right from your kitchen faucet with ease. The housing is compatible with our finest 10 x 2.5 inch filter cartridges. A countertop system like ours allows you to have all the same functionality as your kitchen sink but with cleaner, fresher water! Fill up your water bottle to-go, fill up a glass pitcher to keep in the fridge, or just rinse your fruits and vegetables with delicious, filtered water!