I am wondering what is the difference between a sweeping 90 and a regular 90. I am installing a pool and thought that a sweeping 90 would be better for flow. But not sure about the pressure.

Thanks,
B

A regular 90 happens in 1 connector, a right angle, a sweeping 90, or a sweep is a 90 with a radius on a section of conduit.
In Electrical, we have to use a sweep or LB's for a 90 degree turn, can't use a 90 like in plumbing, as you cannot push a fish tape through.

Here are the pitures of the sweep 90 elbows, the second picture is of 2" long sweep 90 elbow SCH 80 CPVC, Thanks.

John

The same thing Afaroo said is true to plumbing also. I always use a long sweep at the bottom of a stack.

Just to add a bit more info: in plumbing there are 4 basic types of 90s. Vent, short 90, regular sweep 90, and long sweep 90.

Vent 90 is used only in venting, Short 90 is used in venting and drains, medium and long 90 are used in drains and may be used in vents as well.

Just be careful not to use ABS 90's since they are Foam Core and will not hold pressure for extended periods. Schedule 40 PVC is just fine. Use Primer and Glue to glue (weld) fittings and pipe together.

Thanks Milo you described it very well.

Regards,
John

Hi all...

Hey bridge, if you are working on a pool then I would recommend that you use PVC pressure fittings... see picture. These are deeper socket and stand up to pressure over the long run much better than regular PVC fittings. These are the only fittings we use on pool pump systems!

I am not recommending schedule 80 PVC, but schedule 40 PVC and PVC pressure fittings... O.K.

They make long sweep 90s in pressure fittings, but I don't think you will find them easily. Best bet here will be to make your own long sweep 90s using two 45s glued together... ;)

Any PVC pipe/fittings that are expected to be exposed to sunlight should be painted silver to reduce possibility of UV light breaking down the pipe over time.

Let us know if you need more info...

MARK