PMES Series Push-to-Connect to Male NPT Swivel Elbow connectors are available in Acetal and select sizes in Polypropylene, and Kynar®. Push-to-Connect sizes range from 5/32 inch to 1/2 inch and Threads range from 1/2 inch MNPT to 1/8 inch MNPT. Gray or White Acetal are NSF and FDA-approved and have Buna seals for air, gases, and potable water applications. White Polypropylene with EPDM seals or PVDF with FKM seals. Maximum temperature 140ºF at 60 psi for Polypropylene. For non-swivel elbows see PME Series.