
All my in-line filters use 1/4" quick disconnects. It's 1/2" FNPT. I've added pictures to show my fittings used. I would discard these filters as they have the wrong labels.

Filter under the sink Aquaphor Crystal Eco
62 Review

Pentek 10 Standard Housing Pressure
10 Review

Hydronix CB 45 2001 Commercial Industrial Activated π§ Water Filter: The Ultimate Solution for Efficient Water Purification
7 Review

π§ The Ultimate Pentek Big Blue Housing NPT: Top-rated Choice for Exceptional Filtration
9 Review

NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review

NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review

NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review

π§ NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
18 Review