Next No special tools, crimping, glue or soldering is needed Can be installed on wet lines Approved for underground and behind the wall applications with no access panels (wrapping required when burying underground) Can be easily removed using a disconnect clip or disconnect tongs (both sold separately) Remove using a disconnect clip or disconnect tongs Large diameter fittings (1-1/4 to 2 in) require a stiffener when connecting to PEX pipe .