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The Daily Insight

How do I backwash my pool

Author

Rachel Hickman

Published Feb 27, 2026

Attach the backwash hose to the waste or backwash port.Turn the filter system off.Turn the multiport valve to Backwash.Turn the filter system back on.Let the water run out of the backwash port and through the backwash hose for about a minute, or until the water runs clear.

Can you backwash your pool into the street?

For many areas, a green pool cannot be pumped into the street or into the storm drains. Most cities restrict this practice to clean and clear pool water only. Some cities such as Phoenix require you to pump into the sewer cleanout of your home.

How long should you backwash a pool?

Open the air bleeder assembly on your filter and turn pump on. Watch the pressure gauge for spikes. After the hose fills with water, backwash your sand filter for 2 – 3 minutes, or until water runs clear.

How long do you rinse after backwash?

Wait for a few minutes until the water runs clear. Turn off the pump to cease the backwashing. Turn the filter valve handle to RINSE and ensure the handle locks in place. Allow the rinse process to occur for 1 minute or until the water is clear.

Does pool backwash hurt grass?

* Can i discharge the backwash water onto my lawn, will it harm the grass / plants? The DE doesn’t harm the grass or plants, excessive chlorine or saltwater may. Alternatively you could backwash to a sewer outlet or clean-out.

Why is my pool not backwashing?

It could be a clogged pump basket, clogged impeller, clogged pipe or clogged skimmer. It could also be a closed or broken valve before the pump. Or, the pump may have an air leak, and is drawing in more air than water, which will also reduce the filter pressure (and filtration).

Do all pool filters have backwash?

Whether you choose to clean your pool with a sand or DE filter, you can easily backwash it on your own. All pool filters follow the same general steps for backwashing, but there may be small variations depending on the model you own. The owner’s manual should have detailed instructions for backwashing your filter.

What is the proper way to backwash a sand filter?

  1. Turn off the pool pump.
  2. Set the filter valve handle to the ‘Backwash’ position and ensure the handle locks in place.
  3. Turn the pump on and backwash for 2 minutes or until the water in the sight glass (located on the filter) is running clear.
  4. Turn off the pump.

How often should I backwash my pool?

Bottom line, the filter must be backwashed on a regular basis to ensure that your pool water is clear. “When do we need to backwash?” – It is recommended to backwash your filter once every 4-6 weeks of regular use.

Is rinse the same as backwash?

The ‘Rinse’ setting should be used after backwashing and again run just for a minute or two. On this setting the water is flowing through the filter in the normal direction but once again is being sent to the waste pipe rather than being returned to the pool.

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Do you have to backwash after vacuuming?

Yes, we recommend backwashing after you vacuum your pool. This allows the filter to shoot out any dirt / debris you have vacuumed up. Don’t forget to set your filter to “rinse” for 30 seconds after backwashing!

Can you backwash with filter balls?

Yes, you save water with FilterBalls with the backwashing. … Simply follow the FilterBalls installation instructions by noting your filter pressure upon installation and backwash when the pressure increases by 5-6 psi. Note your starting pressure will be much lower than what you experienced with sand.

Do you vacuum a pool on backwash or waste?

Don’t use any metal object that can rust as a weight. 8. Vacuuming pool with filter valve in “backwash” position. When a pool is vacuumed with the sand filter valve in the “filter” position, the dirt and debris that passes through the pump ends up inside the filter on top of the bed of sand which is where you want it.

What does backwashing a pool do?

Well, as the name suggests, backwashing involves reversing the flow of water through your filter media, be it Zeoplus, sand, glass pearls or diatomaceous earth (DE). This dislodges dirt and debris that may have become trapped, and flushes it out through your multiport valve waste line.

Can you backwash a pool too much?

Can You Backwash Too Much? If you backwash your pool too much i.e. time duration and/or close frequency then yes you can cause a lot of problems. Some problems that can arise from backwashing your sand pool filter too much are: Loss of water – 500+ litres of water can be lost in each backwashing cycle.

Does backwashing lower water level?

For inground pools with a sand or DE filter, the easiest way to quickly lower the water level is to place the multiport valve into the waste position and roll out the backwash hose. If instead, you have a slide (push-valve), backwash the filter to lower the water level.

What is the difference between backwash and waste on a pool filter?

Filter Settings Drain/Waste: Opting the drain or waste setting will remove pool water without forcing it through the filter. Backwash: This clears out any debris, dirt and other contaminants that may have accumulated on the filter.

Is it OK to run pool pump 24 hours a day?

The size of your pool, the efficiency of your pump and filter, and how dirty your pool is are just some of the factors you need to consider. Nevertheless, most pool cleaning professionals would advise against running a pool pump for more than 8 hours a day.

Do I need to backwash a cartridge filter?

Unlike other filtration systems, cartridge filters don’t require backwashing, which means homeowners don’t waste the water and extra energy involved in backwashing. The small size of cartridge filters allows them to be run on smaller pumps because they can run with a lower flow rate pump, which saves energy.

Do you lose sand when backwashing?

After filling a sand filter it is normal for the filter to expel excess sand during backwashing for a few times .

Where is the impeller on a pool pump?

A pump impeller sits behind the pump basket in the part of the pool pump called the Volute (aka Impeller Housing). The pump basket is in place to prevent small debris from entering the volute, and possibly clogging the impeller.

How can I drain my pool without flooding the yard?

  1. Unroll the pump’s intake hose so that it reaches the center of the pool (or as close to it as possible), and submerge it in the pool.
  2. Place the outlet hose so the exiting water doesn’t flood the area, but drains off away from the pool.
  3. Dry your hands thoroughly.

Where do I drain my above ground pool?

You’ll want to place the submersible pump on the floor in the center of your pool. The submersible pump will have a hose connected to it. Place the other end of that hose to where you’ve decided to drain your water. Make sure it reaches all the way, or you’ll have a flood to deal with.

Should I backwash after shocking pool?

Backwash only as needed. Brush the pool vigorously, several times after shocking the pool. Do not use a solar blanket until chlorine and pH level are normal. … Improve filtration with a pool filter cleaner or filter aid like Jack’s Filter Fiber.

Why does pool pump lose pressure?

Anything that restricts the water flow on the suction side of the pump will cause low water pressure. That includes a blockage between the skimmer and the pump as well as pipes that are too small. To check for a blockage, remove the skimmer basket and check for debris in the pipe.

How do I lower the pressure in my sand filter in my pool?

Turn off your pool pump and filter. Open the pressure relief valve to lower the pressure in the pool pump. When the valve is opened, water will be emitted but will slow to a trickle and stop after a few seconds. This is normal.