John Guest Speedfit Male Connectors for under sink and inline water filter housings, 1/4" up to 1/2". White polypropylene construction EPDM O-ring FDA approved material NSF Certified 51 & 62 Suitable for water & food applications.
Example of how to read connector specifications: 1/4" x 1/4" - Tube OD 1/4" by 1/4" NPTF.
PP010822W - John Guest 1/4" x 1/4"
PP011822W - John Guest 3/8" x 1/4" , 3/8" tube OD quick connect, 1/4" thread.
PP011223W - John Guest 3/8" x 3/8"
PP011223W - John Guest 1/2" x 3/8" , 1/2" tube OD quick connect, 3/8" thread
PI011624S - John Guest 1/2" x 1/2"