No sealants are required
PEX EVOH pipes do not require sealants or lubricants. Mechanical and fusion fittings create their own seals. Sealants are not needed for the pipe joints. Example: a clean, dry connection.
Heat fusion fittings
Heat fusion is the preferred joining method. The pipe and fitting are melted together. No sealant or lubricant is used. PEX EVOH pipes fusion joints are sealant-free.
Mechanical fittings
Mechanical fittings such as crimp and compression fittings also do not require sealants. The ferrule or ring creates the seal. A clean pipe surface is all that is needed. PEX EVOH pipes mechanical fittings seal without sealants.
Push-fit fittings
Push-fit fittings have an internal O-ring. The O-ring creates the seal. No sealant or lubricant is needed. PEX EVOH pipes push-fit connections are ready to use.
Clean pipe preparation
Clean the pipe end before insertion. Remove dirt and debris. The pipe surface must be clean and dry. PEX EVOH pipes require clean preparation.
Deburring is important
Remove burrs from the cut pipe end. Burrs can damage O-rings. Deburring ensures a proper seal. PEX EVOH pipes need smooth, burr-free ends.
Lubricants are not recommended
Do not use lubricants on the pipe or fittings. Lubricants can damage O-rings. They may cause the fitting to slip. PEX EVOH pipes should be installed without lubricants.
Example: heat fusion installation
A plumber installs PEX EVOH pipes using heat fusion. The pipe and fitting are heated and joined. No sealant or lubricant is used. Example: a clean, strong joint.
Example: compression fitting
A plumber uses a compression fitting for a repair. The pipe is inserted without sealant. The ferrule creates the seal. PEX EVOH pipes compression joints are sealant-free.
Example: push-fit connection
A homeowner uses push-fit fittings. The pipe is inserted directly. No sealant or lubricant is needed. PEX EVOH pipes push-fit connections are simple.
Special considerations for threaded fittings
Threaded fittings may require tape or sealant. Use PTFE tape on threaded connections. This is for the threaded joint, not the PEX. PEX EVOH pipes threaded connections need tape.
Final sealant and lubricant summary
PEX EVOH pipes do not require sealants or lubricants. Heat fusion and mechanical fittings create their own seals. Clean pipe preparation is important. Deburring ensures proper sealing. Lubricants are not recommended and can damage O-rings. Threaded connections may require PTFE tape. PEX EVOH pipes installation is simple and clean. Example: no special sealants needed.