The next method you can do to repair the leaking pool light niche is to buy something called a pool light niche cord leak plug.
Pool light leak plug.
Pool leak in light niche if the leak is down the conduit you can go to an auto supply store and buy a box of window sealing strip ribbon.
Pack the ribbon around the light cord and the bonding wire and stuff in to the conduit.
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Run the pool on the main drain only to determine if the pool light is leaking.
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You will also need to close the pool for a day.
Under water lights can and do leak as well especially the conduit that runs from the light niche to the junction box.
Working around a light pot the dye method is usually simplest.
Eliminate water leaks at pool light forever.
Check all lights if you have more than one in the pool.
The conduit can become crushed or can freeze and crack during winter.
Repair leaking pool light niches.
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A product solution called cord stopper wraps around your cord to seal up the cord conduit inside the niche.
The way to determine a pool light leak is by continuing to operate the pool on main drain only close or plug the skimmers and allowing the pool water level to drop.
G p tools 1 rubber plug for leaking lights.
Plug the skimmer and turn off the motor.
Filling the opening of the conduit in the back of the light niche with pool putty black butyl tape or using a cord stopper are ways to fix this problem.
Never mess with putty or silicon again use on any underwater light niche where leaking is a problem product information product dimensions 7 x 5 x 1 inches item weight 0 353 ounces manufacturer g p tools asin b00jh26sas.
This is a black rubber plug that will fit around the wire of the pool light and into the inner part of the electrical conduit and then can be pressed it firmly to seal the niche.
Slide in cord and push into conduit.
Concrete and vinyl pools generally use a light niche that resembles a sideways bucket with a small hole in the upper back for the light cord to run through.
Do this a couple of times and this will stop the water from going into the conduit.
If the water level seems to stabilize at the level of the light or more precisely just a few inches below the top of the light you may have a conduit leak.
Someone will need to get wet though as this method requires that the water in the pool be high enough that the leak is actually leaking note here the more water there is in the pool the stronger faster the leak will be making it easier to identify.
This port on the light niche is commonly connected to a gray pvc conduit.