How To Backwash Your Sand Filter

clock June 23, 2016 07:00 by author medallionpools |

These instructions are for a standard sand filter with a multiport valve. Please see your owner’s manual to verify the proper backwashing/cleaning procedure for your particular filter.

It is important to remember that you only need to backwash if the pressure gauge is reading too high or the flow of water from your return into the pool has slowed. While you are backwashing you will need to watch the level of the water to make sure it does not go below the bottom of the skimmer. Re-fill the pool if necessary. If you backwash too much, you will need to chemically re-treat the water. Follow these simple steps to backwash your filter:

1. Turn off the pump.

2. Attach a hose to the backwash port.

3. Clean the skimmer basket.

4. Turn the filter handle to the “backwash” setting (make sure you roll out the backwash hose).

5. Turn the pump on.

6. Let the pump run until the water in the sight glass on the filter is clear. Your water should start clear, then become dirty, then become clear again. This process should take approximately 1 to 1.5 minutes on average.

7. Turn off the pump and set the filter handle to the “rinse” setting then turn on the pump for 20 seconds or until the water coming out is clear.

8. Turn off the pump and return the filter handle to the “filter” setting.

9. Turn on the pump and resume normal use of the pool. The reading on your pressure gauge is now showing the normal reading for your pool.



When Should You Change The Sand In Your Sand Filter

clock April 28, 2016 07:00 by author medallionpools |

Have you noticed the look of your pool water is not as clear as it used to be? Have you noticed no matter how much water clarifier you put into your pool, the water is still cloudy? Have you noticed the sanitizer level is not as stable as it used to be? Do you notice dirt or debris blowing back into your pool thru the return fitting?

If you answered yes to any of these questions, when was the last time you either cleaned your sand filter or changed your sand? You should use filter cleaner each season and clean your sand. For example; if your sink becomes clogged at home, you usually use a drain cleaner to remove the problem. Same principle with a sand filter but you would use filter cleaner.

It is not a set rule when you should change your sand but a good guideline is usually every 3-5 years if you have been using a filter cleaner every season. If you do not use a filter cleaner you will need to change it more often. This time line can change based on what type chemicals you use, amount of activity in your pool, and how often you keep the filter running. Suntan lotion and waste from your body both play a part in decreasing the effectiveness of your sand filter.

When you do change your sand in the filter, it is a good time to also check the laterals that you will find in the bottom of your filter below the sand. If they are broken or cracked, be sure to replace them. Any that are broken could cause sand to blow back into your pool. You should cover these laterals with water first before adding any sand. The heavy sand could cause some damage to them.



How To Change The Sand In Your Pool Filter

clock February 11, 2016 08:00 by author medallionpools |

After a few years of normal operation your pool filter sand gets full of particles and debris that will cause your chemicals to not work as well as they normally should. Changing your sand is a simple process that should be done at least every 3-5 years to make sure your pool operates at 100%. Here are the quick and easy steps to replacing your sand filter. Please note that these are generic directions for a unit with a removable, top mount valve. For the correct procedure for your filter, refer to the owners manual that came with your filter.

1. Turn off the pump, unscrew the drain plug on the bottom of the sand tank, and take off the Multi-Port valve.

2. Take a wet/dry shop vacuum and suck out all the old water and sand.

3. Once all the sand is removed take a water hose and spray out any remaining debris that is left in the tank (Be cautious to not break the plastic laterals that are in the bottom of your tank when vacuuming)

4. Put back on the drain cap for the sand filter.

5. Fill your tank at least half way up with water (this helps the sand settle down easily without breaking the plastic laterals)

6. The type of sand that you add to the filter will be #20 silica sand which is specifically produced for filter media. This sand is between 40-50mm in diameter and is available from most swimming pool supply stores. Do not substitute other types of sand or you will almost certainly have problems with your filter and potentially damage the pool also.

7. The amount of sand that you add to the filter will depend on the size of filter that you have. You must be certain to find accurate information about how much sand to use in your filter. Over filling or underselling the filter will at least cause the filter to not function properly, and at worst cause damage to the filter. Filter sand sizes range typically from 100 or 150 lbs all the way up to 600lbs or more for large pools.

8. Be sure not to get any sand into the sandpipe which will be wide open. It is difficult to get the sand actually into the filter without getting it in the sandpipe so you may like to tape up the standpipe opening to prevent this spilled sand from making it back to the pool through the return lines. Also, be sure that the sandpipe is aligned in the center of the tank during the process of adding the sand. Failure to do so will cause you to have problems putting the multi-port valve back on the tank.

9. Gently pour the sand into the filter. Failure to fill the tank at lease half full of water and/or dumping the sand in too roughly can break the laterals in the bottom of the tank.

10. Once the sand tank is filled with the required amount of sand, you can put the MPV back on. Make sure the MPV is tight and secure (do not over tighten.)

11. Once back together the first thing you need to do is give the filter a thorough backwash. You should start this process by over filling the pool and then backwashing for as much as 3 to 5 minutes, followed by a 60 second rinse cycle before setting to "filter".

If you have any questions about the process of changing your sand, please make sure to contact your pool professional.