Find the right filter — no guesswork
Type your system or the number printed on your filter and we'll match it exactly. Don't have it handy? Just tell us what yours looks like.
What do you need a filter for?
Easiest: enter your system or the model/part number printed on your current filter.
don't have the number? tell us what yours looks like
What size cartridge does your housing take?
The hard constraint — it either physically fits or it doesn't.
Not sure? Measure the old cartridge. Most under-sink & RO systems use 10" × 2.5"; "Big Blue" housings are the fat 4.5"-wide ones.
What do you want it to do?
For housings.
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Replacing a sealed inline filter
The easiest match is the number printed on your current filter.
🔎
Have your old filter handy?
Type the model/part number on it (e.g. “K2515”) — we’ll take you straight to the exact match, fitting and all.
or match by the fitting on the ends
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Quick-Connect (push-in)
Plastic tubing pushes straight into the cap and clicks in. No threads. Most RO systems use this.
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Threaded (NPT / FPT)
The cap has screw threads — a fitting or pipe screws in. Measure across the opening: ⅛", ¼", or ⅜".
Still unsure? Send a photo of the ends and we’ll identify it →
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📸 Match your filter from a photo
Snap the label on your filter — we read the model and find the exact match plus compatibles.
Reading the label…
Detecting model number
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