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Old 06-24-2012, 05:46 PM   #1
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Underground Run To Outlet For Pool. LB fitting out of siding?


Need to come about 40 feet off the rear of the house to accomodate an GFI outlet to run a pool pump. GFI outlet will be mounted in a weatherproof box on a 4x4 post cemented in the ground near the filter.
I want to run plastic conduit in a trench from house to the 4x4post.
Want to come thru the rim joist in the basement which will put me about 8 inches up from the last edge of the vinyl siding shown by red in the picture. My question is what fitting is used first on the outside of the siding to transition from horizontaly thru the rim joist to vertically down the house and into the trench in the ground?

Would an LB fitting be used?
Is a vinyl siding mounting block needed?

Thanks
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Old 06-24-2012, 05:51 PM   #2
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Underground Run To Outlet For Pool. LB fitting out of siding?


Yesa PVC LB will do the trick and not look bad. If you are using PVC for the whole run you will need an expansion joint under the LB so when he frost gets in the ground and moves the ground, the pipe will have some where to move instead of pulling out of the LB. Here is a picture of one http://images.search.yahoo.com/image...hs-avgb-chrome

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Old 06-24-2012, 06:31 PM   #3
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Underground Run To Outlet For Pool. LB fitting out of siding?


How is the LB fitting secured against the siding? Is it basically secured by the horizonta conduit piece that goes thru the siding and rim joist into a box on the inside of the house? good tip on the expansion joint fitting.
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Old 06-24-2012, 06:49 PM   #4
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Underground Run To Outlet For Pool. LB fitting out of siding?


That is all the holds it in place plus you should have a clip before it goes into the room.

Just make sure when you install the expansion joint that it is sitting at its midway point and not all the way closed.

SOme duct seal around the LB and inside the LB will help prevent the cold air from getting inside the house.
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Old 06-24-2012, 07:34 PM   #5
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Underground Run To Outlet For Pool. LB fitting out of siding?


Thanks for the ideas. I know how all the wire connections need to be made. No problem there. Its just I never worked with a run outside.
If my junction box on the inside will be metal. is there a fitting to transition from the pvc conduit to fit into a 3/4 knockout in a metal junction box
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Old 06-24-2012, 07:49 PM   #6
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Underground Run To Outlet For Pool. LB fitting out of siding?


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If my junction box on the inside will be metal. is there a fitting to transition from the pvc conduit to fit into a 3/4 knockout in a metal junction box
On the end of the plastic conduit inside the house glue on a female adaptor. Then use a 3/4 EMT set screw fitting with the male threads of the set screw fitting into the female threads of the female adaptor.
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Last edited by hammerlane; 06-24-2012 at 07:54 PM.
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Old 06-24-2012, 08:16 PM   #7
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Underground Run To Outlet For Pool. LB fitting out of siding?


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If my junction box on the inside will be metal. is there a fitting to transition from the pvc conduit to fit into a 3/4 knockout in a metal junction box
Just use a male terminal adapter. It looks like half a coupling with male threads on one side. You will also need a locknut.
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Old 06-24-2012, 08:38 PM   #8
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Underground Run To Outlet For Pool. LB fitting out of siding?


What is that?


It looks like some sort of 1/2"-3/4" reducing coupling that I've never seen.
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Old 06-24-2012, 08:49 PM   #9
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Underground Run To Outlet For Pool. LB fitting out of siding?


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What is that?


It looks like some sort of 1/2"-3/4" reducing coupling that I've never seen.
I beleive the PVC part would be female threaded and then you make a nipple with a piece of EMT and two connectors, complete waste of money.
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Old 06-24-2012, 09:35 PM   #10
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Underground Run To Outlet For Pool. LB fitting out of siding?


I've seen PVC female adapters, but that doesn't look like any I've seen.

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Old 06-24-2012, 09:44 PM   #11
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Underground Run To Outlet For Pool. LB fitting out of siding?


I think it is just the angle the picture was taken from.
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Old 06-25-2012, 04:44 AM   #12
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Underground Run To Outlet For Pool. LB fitting out of siding?


Quote:
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I think it is just the angle the picture was taken from.
I agree, it looks tapered, but it's not.
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Old 06-25-2012, 06:39 AM   #13
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Underground Run To Outlet For Pool. LB fitting out of siding?


Quote:
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I think it is just the angle the picture was taken from.
Not the angle. I screwed up and put a stock photo of a PVC coupling not a female adaptor. Good eye everyone.

And like Jim Port suggested a simpler way is to use the male adaptor on the end of the PVC to go into a knockout on your metal box.
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Old 06-25-2012, 07:03 AM   #14
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Underground Run To Outlet For Pool. LB fitting out of siding?


found this on another thread
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Old 06-25-2012, 07:14 AM   #15
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Underground Run To Outlet For Pool. LB fitting out of siding?


That is the idea. Typically the LB would be more flush to the siding.

Don't forget to caulk where the fitting leaves the house.

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