Make sure that the filter pump won't be able to turn back on while you are working on it. Locate the switch for the pool filter and turn it off. This will stop water from entering the system while you clean it, as well as cutting power to the area while dealing with water. The switch for your pool filter should be nearby the filter itself. For extra safety, or if you cannot find the right switch, cut power to the area from your circuit breaker box before you begin working. Locate the drain plug near the bottom of your filter tank and unscrew it completely. This will let all of the water drain out of the tank, so make sure it is draining somewhere away from your pool that will not be affected by a lot of water. Fully draining the tank can take up to an hour, so give it plenty of time.  If your pool filter is in a pump house or anywhere else you don’t want water draining, quickly attach a hose over the drain plug after you remove it. This will let the water drain elsewhere. Make sure not to lose the drain plug, or any other components you remove from the pool filter. Keep them somewhere safe until they are ready to be reattached. Locate the collar around the edge of the multiport valve, near the top of your filter tank. Use a screwdriver to loosen the bolts on either side of the collar until you can remove them completely. Pull apart the two sides of the collar to remove them. The collar on the multiport valve is used to clamp it in place, so may also be referred to as a “clamp.” Any pipes connected to the valve will make removing it much more difficult. Carefully unscrew the unions near any pipe attached to the valve and disconnect the pipes. If the pipes attached to your valve do not have unions to allow them to be removed, you will have to use a saw to cut the pipe instead. As you’ll need to replace the sand in your pool filter regularly, install union fittings on the pipe so that you can easily connect and disconnect the pipes in future. Firmly grip the top of the multiport valve and begin wiggling it as you lift the valve off of the tank. Carefully remove the valve so as to prevent damaging it or anything inside the tank. This will prevent any sand from getting into the pipe and working its way into your pool while removing or adding sand. Duct tape or any strong tape will work, as will a rubber plug that fits, but make sure it is easy to remove when you're finished. Lower the nozzle of a shop vac or similar tool into the opening of the tank and begin removing the old sand from the bottom. As you remove sand, be careful to avoid directly touching or hitting any components or laterals at the base of the tank. These can be fragile and difficult to replace. If you do not have a shop vac, you can use a large cup or scoop to remove the sand from the bottom of the tank. This will take longer, and as the sand has been filtering everything in the pool, can be unsanitary. If you choose to do this, always wear gloves and be careful. Once you have removed the bulk of the sand from the tank, use a garden hose to thoroughly clean it both inside and outside. Spraying water into the tank should help clean out any last bits of sand left inside the tank. Make sure any fittings on the tank are dried fully before reattaching anything to them. The moisture can get trapped inside the threading on your tank and may damage the components over time. Keeping the tank dry will also help in detecting a leak when the pump is turned back on.
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One-sentence summary -- Turn off the pump on the pool filter. Remove the drain plug and let the filter tank fully drain. Take the collar off the base of the multiport valve. Unscrew the unions holding the pipes to the multiport valve. Remove the multiport valve by twisting slightly and pulling upwards. Cover the standpipe with tape or a rubber plug. Use a shop vac to remove the old sand. Clean the tank thoroughly.

Article: If you want to keep your hat looking like its just from the store, you want to keep that sticker looking as clean as possible. Water will ruin it very quickly, making it peel and flake off. If you're trying to clean the hat up without messing up the sticker, a big of cling wrap from the kitchen will do the trick. Cut a piece of plastic wrap big enough to cover the sticker by a few centimeters on each side, then tape it in place. Make sure the tape seals the plastic thoroughly. It's important to use cold water on a new hat, which keeps the dye from seeping out, though you can feel free to use hotter water on older hats that have been washed already. If you want to find out if your cap will bleed if you toss it into the washing machine or the dishwasher, do a little spot treatment with a white cloth. Wet the cloth with hot water and blot at the colored area of the cap. Does any color come off? Keep washing it in cold. If not, you're safe. Probably the most effective way of gently but firmly getting into any stains–sweat, oil, or otherwise–is to use a brand new, soft-bristled toothbrush, wetted slightly in the cold water. Move the brush in tight circles, scrubbing away the stains gently. After you clean the cap with soap, re-wet the toothbrush with plain water and gently go over it again to try to keep working the stains out. If you prefer, you could also switch to a wet-wipe, or a cloth to cover more territory. It's very important to set up the cap like you want it to look and let it air dry for about 24 hours before wearing it. If you've gotten the cap fairly damp, it can loose some of its shape, and start to look saggy and old, which is what you want to avoid. Set the clean cap up with the brim flat, and the top of the hat supported with  Consider getting a cap mold to help hold the shape of the hat. These are commonly available at hat stores and other clothing retailers, only cost a couple of bucks, and help you hold the shape of your hat long term, especially while drying. If you've got an adjustable cap, keep it adjusted to the size you wear. While it might seem quicker, putting the hat into a clothes dryer will ruin the shape and crispness of the hat faster than anything else. The heat will soften the structure of the hat, making it much more pliable. Let hats air dry. One of the easiest and quickest ways of washing any baseball cap is to put it into a cap mold, set your dishwasher to a cold setting, and run it through about a half cycle by itself. Remove the hat about halfway through the cycle and let it air dry. Make sure your dishwasher is extremely clean if you try to do this, and only do this for older hats that won't bleed.
Question: What is a summary of what this article is about?
Tape plastic wrap over the sticker. Fill the sink with cold, soapy water. Scrub stains gently with a soft toothbrush or a clean cloth. Go over it once more with cold water. Air dry the cap. Consider washing the cap in the dishwasher.