I have black poly pipe with a blue line through it. What fittings can be used?
This is “blue line” or Metric pressure polyethylene pipe. The blue line identifies the pipe as for water or general purpose. Any fittings suitable for pressure poly can be used, including Metric compression fittings, pressure electrofusion (Durafuse) fittings, Viking Johnson Aquafast fittings and Akatherm pressure short spigot fittings for buttwelding.