EPDM is the primary O-ring material
PEX Sliding Fittings typically use EPDM O-rings. EPDM is an ethylene propylene rubber. It resists water, heat, and chemicals. Example: EPDM is used in hot water systems.
EPDM properties
EPDM has excellent resistance to hot water. It withstands temperatures up to 180°F. It resists aging and ozone. PEX Sliding Fittings with EPDM are durable.
EPDM for drinking water
EPDM is approved for contact with drinking water. It does not leach harmful chemicals. PEX Sliding Fittings with EPDM are safe.
HNBR for gas applications
HNBR is used for gas applications. It resists hydrocarbons and gas permeation. EPDM is not suitable for gas. PEX Sliding Fittings for gas use HNBR.
HNBR properties
HNBR has excellent resistance to oils and fuels. It withstands high temperatures. It is durable and long-lasting. PEX Sliding Fittings with HNBR are for gas.
FKM (Viton) for extreme conditions
FKM is used for high-temperature applications. It withstands temperatures up to 400°F. It resists aggressive chemicals. PEX Sliding Fittings with FKM suit harsh conditions.
Example: water system
A hot water system uses PEX Sliding Fittings with EPDM. The O-rings last for decades. The system is reliable. Example: EPDM for water systems.
Example: gas system
A gas system uses PEX Sliding Fittings with HNBR. The O-rings resist gas permeation. The system is safe. Example: HNBR for gas applications.
Example: industrial application
An industrial system uses PEX Sliding Fittings with FKM. The O-rings resist high temperatures. The system is reliable. Example: FKM for harsh conditions.
O-ring color coding
EPDM O-rings are often black. HNBR O-rings are often yellow. FKM O-rings are often green. PEX Sliding Fittings use color coding.
O-ring durability
O-rings last the life of the fitting. They resist aging and degradation. PEX Sliding Fittings O-rings are long-lasting.
Final O-ring summary
PEX Sliding Fittings use EPDM, HNBR, or FKM O-rings. EPDM is for water and hot water. HNBR is for gas applications. FKM is for extreme conditions. All materials are durable and reliable. PEX Sliding Fittings O-rings ensure leak-free connections. Example: choose the right O-ring for your application.