How do you keep a plastic expansion coupler waterproof ?

Hi guys

As the description

I need to run some black plastic conduit along the back of a house to feed some outside lights. The straight run is probably 10 to 12 meters with 3 or 4 fixed T boxes for drops to light fittings. I want to glue all the joints to keep any water out but was thinking of fitting some expansion couplers to stop it all twisting in the sun. Not something I have used before. How do you keep them water tight ? Or do they have some sort of rubber insert like plumbing fittings. Or does anyone have a better idea .

Thanks

Gary

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0 aligarjon 24 days ago

Cheers guys.

I suppose I could drill a drain hole at the coupler as well.

Thanks for the advice

Gary
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0 aligarjon 24 days ago

Cheers guys.

I suppose I could drill a drain hole at the coupler as well.

Thanks for the advice

Gary
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0 tattyinengland 19 days ago in reply to aligarjon

I'm much more used to metal - so this is guess work on my part - Plastic flexible conduit fits perfectly into a plastic through box, so perhaps two though boxes with a bit of flexible conduit glued in might work well. Obviously dont fix the through boxes to the wall. All joints glued as normal.
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How do you keep a plastic expansion coupler waterproof ?

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