Ultra-resistant to chlorine in most demanding conditions (hot water domestic continuous recirculation). Provides long term protection against chlorine degradation. Highest chlorine resistance rating. Resists UV rays 6 times longer. Ultra-resistant Superpex pipe offers two layers of defense against damaging UV rays. Rated 180 days compared to standard PEX pipe with 30 days maximum exposure. Highest UV resistance rating. Use with crimp joining methods.