Tip #35: Changing a Light Bulb
By code, there is enough cord wrapped around the back of the fixture that you can undo the one screw that holds the light in the niche and lift it up onto the deck.
Most fixtures are removed by simply reaching down from deck level. Getting a light fixxture out is the easy part. It's getting them back in that gets tricky.
Lights manufactured in the last fifteen years are secured with a single screw and stainless steel band. A small slotted screwdriver holds one end. The other is secured with a 5/16" open-end box wrench.
Unscrew the old bulb and look for the small bronze tab at the bottom of the socket. This tab must make contact with the bottom of the bulb for the bulb to work. After checking again that the power iis 'off', lift it gently with your slotted screwdriver.
Install the new bulb and turn the power 'on'. Because the fixture is open, there is no chance of heat blowing up the bulb. Turn the power off again and install a new gasket around the lens. You're dealing with electricity and water, so anytime the light is opened, you'll want to change this lens gasket
The convex lens extends beyond the metal rim which means it will not sit flat. Three shims like these pavers hold the light ring securely without it rolling.
This little trick will save you the hour of frustration that you'll need to get the fixture back into the wall.
Most pool operators routinely clean the filter, but how many know to clean the grids? Considering all the material commercial DE grids sift out of pool water, it's a wonder they don't have to cleaned more often than they do.
But grit gets into the fiberglass threads and oil and metal deposits in the water leave a fine coating that reduces their full flow potential. Backwashing removes most of the filter powder, but to remove grit, gristle and oils, you've got to clean the grids.
The next time you have the filter tank empty, take a moment to clean the grids.
Here a mixture of 1 gallon of muriatic acid with 1 gallon of water and a healthy squirt of Dawn dish soap are sprinkled over the grids. Leave the area while the acid sizzles. In five minutes or so, come back and open the main drain valve until the water level rises to the bottom of the grids. Gently close the valve and drain the tank using your vacuum pump. Scoop in the required amount of DE powder, re-open the main drain and gutter valves to stir everything up (careful not to breath the dust) and turn on your recirculation pump.
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