If your filter is shaped like a "salami" with tubes coming in one end and out of the other - then it's what we in the business call an in-line water filter.
Female Adaptor Reducer Connector Fitting to Quickfit Pushfit Water Pip – Water Filter Men
15mm BSP x 6mm Push Fitting Connector This tap adapter screws onto male BSP 1/2 (15mm) threaded stem of standard plumbing compression fittings to
BSP 15mm x 6mm Push fitting water pipe connector adapter
Frizzlife Inline Water Filter System for Refrigerator, Ice Maker, Unde
How to Remove Your Water Filter Tube from a Speed-Fit / Push Fit Connection Fitting
1/4 Push Fit Fittings, RO Push Fit Pipes & Connectors, Finest Filters
GE SmartWater Compatible Inline Filter Kit w/fittings - GXRTQ – Fresh Water Systems
Eco Inline Water Filter with 1/4 Inch Push Fittings
Inline Filter Push-Fit
Reverse Osmosis Installation – H2O Distributors
Big Zip™ EVO Reservoir Water Filter Connector Kit
Blu Tech MR3 3-Stage Portable Water Filtration System –
The Osmio EZFITPRO-100 Undersink Water Filter Kit is a simple and effective compact Water Filter unit with 15mm Push Fittings for easy connection to
Osmio EZFITPRO-100 Undersink Water Filter Kit 15mm Push Fit
Residential PFAS/PFOA Filter
Water Filter fittings
Frizzlife Inline Water Filter System for Refrigerator, Ice Maker, Unde