Re: Problem: locations around pool has sand-like dirt collec
If your current plumbing does not allow you to vacuum to waste, you can try to rig up a waste line with a backwash hose, a pool hose adapter or threaded pvc male fittings if the adapter is unavailable, and a band clamp. Your return will be either 1 1/2" or 2" pipes. Unscrew the eyeball fitting in the return and take it with you to the pool store. Use the threaded end to find the right size adapter. The adapter will screw in to the return line. Get the band clamp and the backwash hose. Pull the backwash hose onto the end of the adapter, fold over any excess hose to get a snug fit, and tighten the band clamp with a flat head screwdriver. Direct the backwash hose out of the pool and away from anything you don't want to get swamped with water. Lay the backwash hose flat so it doesn't have any creases or kinks. Hook up the vacuum and start cleaning. You will lose quite a bit of water this way, but whatever dirt comes out of the filter will not go right back into the pool. You can also hook up the garden hose and refill while you are vacuuming. It won't replace water as fast as it is coming out but it will help. Keep an eye on your water level and don't let it drop below the skimmer.
If you have more that 1 return you may want to set up a waste line for each one, or get a threaded plug and close it off.
Consider having a waste line plumbed between the pump and the filter when you have the filter replaced. If you pick a cartridge filter they may say you don't need a waste line, but if you ever need to empty water from the pool they are invaluable.
If your current plumbing does not allow you to vacuum to waste, you can try to rig up a waste line with a backwash hose, a pool hose adapter or threaded pvc male fittings if the adapter is unavailable, and a band clamp. Your return will be either 1 1/2" or 2" pipes. Unscrew the eyeball fitting in the return and take it with you to the pool store. Use the threaded end to find the right size adapter. The adapter will screw in to the return line. Get the band clamp and the backwash hose. Pull the backwash hose onto the end of the adapter, fold over any excess hose to get a snug fit, and tighten the band clamp with a flat head screwdriver. Direct the backwash hose out of the pool and away from anything you don't want to get swamped with water. Lay the backwash hose flat so it doesn't have any creases or kinks. Hook up the vacuum and start cleaning. You will lose quite a bit of water this way, but whatever dirt comes out of the filter will not go right back into the pool. You can also hook up the garden hose and refill while you are vacuuming. It won't replace water as fast as it is coming out but it will help. Keep an eye on your water level and don't let it drop below the skimmer.
If you have more that 1 return you may want to set up a waste line for each one, or get a threaded plug and close it off.
Consider having a waste line plumbed between the pump and the filter when you have the filter replaced. If you pick a cartridge filter they may say you don't need a waste line, but if you ever need to empty water from the pool they are invaluable.