How can I make a turn of less than 10 degrees when building a PVC sewer line?
At Home Depot, they only have special elbows at around 22 degrees. I appreciate any help, and if you need any more info, please ask as I'm really interested in finding out how this is done. It is a 4 inch diameter pipe. Any websites for smaller angle fittings would also be appreciated.
Public Comments
- Get 2 90's and a connector piece between. Provided you have the room you can make any angle. The 90 would point down and the other 90 would point up and then in any other direction.
- The 22 degree is a 45, make a 45 and back again- start down stream from the turn.
- Can you heat the PVC? I think that a 10 degree bending, with heat, won't affect the integrity of the pipe. Well, anyway, what is diamenter? If you go with the elbows you'll need 4, with the disadvantage that the more accesories you use the more loss you have in the flow, and this will force you to use a bigger size.
- There should be a 11.25 degree bend also. I would check a differnt store. PVC does have a litle give to it and you can deflect up to about 4 degrees with a longer run.
- Check for other suppliers in your area, like Ferguson or another local plumbing store, They do make an 1/8 bend that is about 11 degrees. If you use this, you should be able to make up the rest of the difference with the flex in the pipe.
- Use two ells as suggested by others, or just bend the pipe over 20'.
- 1/8 th bend is a 45 degree fitting 22 degree fitting is 22 degrees 60 degree fitting is 60 degrees A long turn elbow is a 90 degree fitting used for horiz to horiz or vertical to horiz. 1/4 bend is a short turn 90 degree fitting used for horizontal to vertical flow only. Depending on what you are doing you can use any two of the top four fittings I've mentioned to tweak out the proper angle and if you use a rubber coupling on one end, you can usually fudge it, just keep your flow. Tip: dry fit your plastic fittings to the angle your going for, then take a Sharpie and make a line across the joint on both fittings, that way when you glue them together you can find that angle again.
- You can heat the pipe to make the bend. Use a normal propane torch and heat right around the pipe at the point you need the bend. If the pipe browns, you're too close, back off. A lot is going to depend on the tip you put on that torch. If it's a fan tip, you'll get a good consistent bend. If it's a needle tip, just be careful of how much heat you're applying and spread it out a bit. We do this all the time with underground plumbing. There's usually never a fitting that's quite right, that will not stress the pipe in the trench, so heating and bending does the job until we get above ground.
- No inspector will ever pass a plumbing job with a scorched pipe. Two quarter bends (90s) create too much resistance to flow and will be disallowed. Some of these answerers must be very sloppy workers. Use two 22 degree fittings but the drain line will have to drop about 6". A neoprene no hub fitting will give you about 10 degrees. Buy the one that is thicker and without the metal sleeve.
