I'm currently working on putting in a Radon Mitigation System. I'm working with 3" Schedule 40 pipe and have come to an odd point. I picked up 45 deg and 22.5 deg couplers during the planning phase as I knew one bend would need them. Now that the first part is done, (putting in the dome on the sump pump) I'm attaching the vent pipe which will pull the air outside. Now the problem. The corner that I had planned would need care is actually about 70 degrees. (Measured, not guessing.) I'm trying to figure out how to do this easily, as I don't have a pipe bendit nor a heat gun. (Yes, I tried with the wife's hair dryer, but by the time I'd get one side hot, the other side would cool off. Nope on that.)

I'm looking into a flexible coupling that would bend at least 10 degrees which would allow me to utilize a 45 deg + 22.5 deg to get around it. (https://www.bestmaterials.com/detail...EaAiFSEALw_wcB) But, since the company is taking their sweet time in getting back to me, I thought I'd post here, where other DIY folks may know a work around.

Any thoughts on this dilemma?

 

Bit hard to comprehend but if you use two 90's, and can accept the off set, you can rotate them to any needed angle!

 

EDITed: AHA! I had to sit and work with a couple of them to see what you meant. Ok, so that would work, but what would it do to the flow of air? From what I'm reading, you want as FEW bends as possible. Any experts out there that know this??

 

I agree and would resolve it with two 90 degree fittings. While it's good to reduce fittings where possible, I wouldn't worry about it at all.

 

If your super concerned (3) 22.5 = 67.5. Probably close enough and oh what a sweet smooth curve.

 

Wanted to stop by and thank you all again. The 2 90 deg worked best. Here is the finished vent.

 

Looks pretty good to me.

 

If this is getting inspected, note that sump pumps are required to be GFCI protected. This is an area of the NEC I don't entirely agree with, but I never had an inspector ask me if I agreed with the code before.

 

I've found that most inspectors won't question a single receptacle for sump pump not being GFI protected.

 

A single receptacle for a sump pump or even for a refrigerator or freezer in a garage used to be acceptable, but codes change. Like I said, I don't agree with all areas of the code, but current code does require GFCI protection for sump pumps and all garage receptacles too. I suppose it could depend on what the inspector shows up. Some may allow a sump pump without GFCI protection and some may not.

 

Looks like a really nice installation. Great job and thanks for sharing.