0

M1502.4.1 Material and size. Exhaust ducts shall have a smooth interior finish and be constructed of metal having a minimum thickness of 0.0157 inches (0.3950 mm) (No. 28gage).

(a) can I use metal spiral pipe (not sure if it meets the "smooth" definition) ? e.g.,: https://www.homedepot.com/p/Master-Flow-4-in-x-5-ft-26-Gauge-Spiral-Pipe-26SP4X60/205330690 (b) does it need to be 4" or can it be a larger diameter

||improve this question
1

According to your pic yes. The smoother the pipe less chance of lint build up.Stay with the 4 inch.They make brushes to clean out easy.And fits the vent caps made for dryer.

||improve this answer
  • Thank you for your reponse. Just to clarify It is ok to use the spiral pipe and no its not ok to use larger diameter – firefiend Jun 8 '19 at 0:54
  • Yes to the pics you sent. My real feeling is get smoother pipe. Your choice – user101687 Jun 8 '19 at 0:58
  • that pipe is pretty smooth on the inside .... i wonder if the air flow is less turbulent in one of the two directions – jsotola Jun 8 '19 at 1:13
  • Aim it to air flow ,if you want, – user101687 Jun 8 '19 at 1:22
  • smaller pipe has stronger wind, you need wind to prevent lint build up. so say with 4" – Jasen Jun 8 '19 at 10:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.