90mm to 100mm pipe…collar or adaptor?

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    • #280084
      Joseph A Collins

      I am plumbing storm water from my shed to a tank. Down pipe is 90mm . Just above the ground I want to fit a Test Opening in 100mm. To go from 90mm pipe to the 100 mm test opening T, should I use a 90/100adaptor, or a 90/100 collar?

    • #302208

      Sorry, I forgot to add, this will all be inspected by the council plumbing inspector, so I want to get it right first go. I dont want to phone and ask him, as I did not enjoy my last discussion with him.

    • #302209

      I would suggest you a collar as later on adaptor may create some problem but collars are very user friendly.

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