How to extend brass pipe/conduit that is buried?

Question

I need to relocate the above-ground junction box that is used by my pool light, and the conduit that feeds into the junction box is 1/2 inch brass pipe. I need to move it several feet further out, and need to know what my options are while maintaining code.
I think one option is to buy several more feet of brass pipe with some kind of coupling, only issue is the closest place that sells brass pipe is 40+ min away.
I believe the brass is threaded at the end going into the junction box. Can I use a threaded coupling that will connect to metal conduit?
Pics are below

Ed Beal · Accepted Answer

You can connect the brass pipe to another brass pipe with a coupling, brass around a pool is the best option as it will not rust. If you would not have said an electrician verified it was brass I would have suggested it was rigid conduit as it looks galvanized to me in the photo. Maintaining the brass will prevent any galvanic corrosion issues , 680.11 allows for rigid pvc but you mentioned pool light. If a wet-niche type light this would explain the comment if they did it right the extra wire. And the use of brass 680.23.8.b. I would continue the brass for the additional safety it provides for grounding.

Correct answer by Ed Beal on April 28, 2021

How to extend brass pipe/conduit that is buried?

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