I have an electric dryer that vents through the crawl space to an outside o pening. The run is about 12-15 feet. It uses the flexable aluminum type pip e and I want to replace it with somethign stouter. One reason is I have ace ss to this space through my garage through a 3 ft x 3ft square opening and when I bring things in and out of this area it hits the pipe. I thought abo ut 4 inch pvc, but read you should not use it becasue of the temperature ra ting and the risk of static electricity casuing a fire. I really dont see i t getting hot enough to damage pvc.
I live in the country. There are not alot of codes. I am not so worried abo ut the codes as I want it to be right and mitigate and potential fire or ot her risks.
I went to Home Depot and looked around. They also sell round ac metal duct but it too seemed kind of flimsey.
Another thing I looked at was gas water heater vent pipe. It is solid, and comes in 4 inch. It would be expensive though. (I think a three foot sectio n was 16 bucks?) I am not sure how you would assemple this togther and atta ch it to the box above the the dryer.
Any suggestions are appreciated!