How do you back wash filter in pool?

Answer 1

that's simple. Backwash the same way you do normally but put the (earth) or diatanacious earth into the skimmer afterwards approx 5 lbs and always make sure you close the backwash valve before you put the earth into the skimmer

New AnswerIt's simple but not quite that simple! Depending on the filter valving type, reverse the flow through the filter either with a multiport valve, push pull valve or rotary valve (located as a lever at the bottom of the tank) Always shut off pump whyen switching the valve(s). Backwash until discharge runs clear. Resume normal filtering direction for 2-3 minutes and repeat 3 times to remove as much old DE as possible (By the way, It's DIATOMACEOUS Earth, NOT Diatanancious)Replace DE at a rate of 3/4 lb (about 3/4 of a one-pound cofee can) per each 10 square feet of filter area. Filter area will be the size of the filter grids and also the model no. of the filter (i.e: FNS 48 = 48 sq ft., Hayward DE36 = 36 sq ft.) Replacement DE should be added as a slurry (mixed with water) into the running skimmer slowly so as not to clog the pipes. Too much DE will cause premature filter loading and excessive pressure at the filter.

Grids (internals) should be removed and thouroghly cleaned at least once a year. Check fabric grids for wear and tears. If you otice DE powder returning to the pool, you probably have a small tear in one of the grids.

Answer 2

The correct expression should be how do you back wash a sand filter. sand filters need back washing when the pressure on front of the filter gets too high. This is done by, stopping the pump and swinging the lever on the top of the sand filter to the backwash position, usually the opposite position. Start the pump. Usually there will be a clear buble near the lever, when the unit is on backwash you will see cloudy water rushing around in it , wait until it clears up, stop the pump again. swing the lever to the rinse position. start the pump and let it run for about 30 seconds or until the water in the bubble runs clear again . Stop the pump. return the lever to the filter position and bobs your uncle, done,

Answer 3

most multiports on sand filters have the following settings * FilterRuns the pools water from your pump through the filter media then back into the pool. this is the setting that is nearly always used. * Backwash Runs pool water from your pump over the filter media and out to waste. This removes dirt that has been collected during filtration. A backwash is required when your pressure rises about 10 pounds over the normal pressure. Most sand filters have a clear bubble situated near the multi port where you can see the water running to waste, watch it and you will see that the water is dirty at first run the backwash until it clears then stop the pump. * RinseRuns pool water from pool through the filter to waste further rinsing the top of the filter media. this should always be done after backwashing to stop cloudy water returning back into the pool * Re-circulate Simply keeps the water circulating from the pool through the pump and back into the pool. It does not put the water through the filter, stops the water from stagnating but still puts it through the static skimmer. * Winter/Closed shuts all the ports and is used when the pool is winterized shut down or to stop water from passing through the valve. * Waste Runs Pool water directly to waste without running it through the filter. This setting if manually vacuuming the pool and the dirt load is too high for the filter to handle. It is also the setting that is used for hand vacuuming when removing settled contaminant and flocculate after flocculating the pool. Never keep the pump running when changing the setting on the multi port as it will cause it to be damaged.