-- Advestisement --Home » Old Questions » Normally the thickness of NP3 concrete hume pipe is Old QuestionsNormally the thickness of NP3 concrete hume pipe isBy adminPublished on: April 7, 2025Follow Us -- Advestisement --a) 3″ b) 1 ½” c) 2″ d) 2 ½”Answer: a) 3″ -- Advestisement --