Go for ease of installation and safety, go for plastic Henco Gas press fittings.

18PKG Henco Gas straight plastic connectors with female thread (CW617):

• Suitable for Henco Gas multilayer pipes measuring 16, 20, 26, 32 and 40 mm in diameter
• Body material: PVDF (polyvinylidene fluoride)
• Press fitting material: stainless steel
• O-ring material: EPDM
• Threaded connection material: brass (CW617)
• Threaded connection available in 1/2", 3/4", 1" and 1 1/4"
• Colour: black fitting body, press fittings with yellow marking
• Suitable for gas, only authorised for use in countries where a gas inspection certificate has been granted
• Suitable press profiles: TH/BE for pipes measuring 16, 20 and 26 mm in diameter; BE for pipes measuring 32 and 40 mm in diameter
• Fitted with leak detection (Leak Before Press)
• Fittings can be embedded without protection
• Flexible: can be bent up to 10 degrees
• Extremely pressure and temperature resistant
• Outstanding mechanical strength
• Exceptional chemical and corrosion resistance