Instructions on placement of the lateral assmebly w/center pegs

A little sand in backwash is not uncommon. Many packaged sand filter systems use pumps whose flow rates greatly exceed the flow capacity of the filter.(the more horsepower the better, right? - Wrong) If this occurs only during back flush the the pump is too strong or the sand level is above the beginning of the rounded top of tank. The sand level will eventually correct itself.

A Hayward S180T sand filter holds 150# of sand. In other words, fill the filter 3/4 full of sand (to the point where the tank starts to round off). Make sure, however, that you fill the tank 1/2 full of water first. This will help to cushion the laterals and prevent them from breaking from the weight of the sand. Make sure to cover the hole in the top of the lateral assembly pipe with a cup or duct tape to prevent sand from going into the pipe. If sand gets into the pipe, it will come out into the pool. Don't forget to remove the cup or tape after adding the sand!

Hello, 1 You need to unscrew the drain plug and screen (if it is still there!) at the base of the filter. 2 You can reclaim most of the sand by letting the filter drain through a sieve (lots of work) or use new sand. 3 Uncouple union joints or couplers that attach to filter head. 4 Remove filter head. 5 You can try pulling some sand out of the top. However, do not damage the filter fingers in the sand. 6 Use a hose to blast the sand out the bottom drain. 7 Inspect all fingers, replace if necessary. 8 After all is cleaned out, place finger mount inside filter. Cover top of mount with a cup or similar to keep the new sand out of the finger assembly. 9 Replace drain plug and screen. 10 Fill filter halfway with water. 11 Slowly pour sand in and spread evenly. 12 Remove mount cover. 13 Reinstall head, unions and couplings. 14 Prime pump and test for leaks.
Good Luck

I am not that familiar with the G series Hayward filters, but most sand filter tanks do not separate. It's a labor intensive job so think hard before trying it if you haven't before. If your backwash valve is on top of the filter, the plumbing will have to be removed. There are two ways that I have removed the sand. Scooping it out by hand or using a shop vac. Remember the sand is going to be very heavy when wet. You will need to go through the top. Some filters have a large drain plug in the bottom that "supposedly" you can drain the sand out through.I have done this once and it makes a big mess that you still need to clean up.

Be sure to buy replacement o-rings and gaskets as needed. There is also a product called a sand vac that is in essence a siphoning system.

Be careful not to damage the laterals it the bottom of the filter. When replacing the sand, I put small gravel (pea gravel) carefully under and partially around the laterals to help support them from the weight of the new sand.

When you are done, be sure to backwash the new sand to remove dirt, impurities, etc. This is a general overview. There are books online that give more detail or use a similar filter's manual...

This indicates that one or more of the laterals are cracked or broken. You will need to open the tank, remove all the sand, inspect the laterals(tubes that come off the center 'stand pipe'). replace any that have cracks or are broken. If you can't tell, replace them all. Fill tank back up with the right amount of sand and close it all back up.
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Yes, the lateral assembly needs to be removed. Please consult the users manual below for specific instructions on how to replace the sand in these pool filters. '

http://www.backyardcitypools.com/images/hayward/pro-series-manual.pdf

First, the vacuum should easily pick up sand if the pump is working properly. The sand in pool may be coming through a cracked or broken lateral. If you changed the sand recently and did not prefill the tank with water, then this could be the reason. Plastic parts do fail eventually. Be sure that you perform the rinse cycle aftewr backwashing to settle the sand bed. Instructions on filter tank.

Replace the lateral assembly. Be sure to fill the tank just under half way with water before adding the sand back in. Otherwise you risk cracking the laterals.

The tank has not been changed so the new laterals should fit. Make absolutely sure nothing is interferring with seating the pipe all the way to the bottom of the tank. If absolutley necessary, you can shorten the pipe in order to make it fit.

if u used play sand, or any other type of sand thats NOT pool filter sand, that could be the problem. also if there is too much sand or too little sand that could also cause this.