What Is the Sanf Filter Pressure to Back Wash Again

Use the multiport valve to aftermath the pool filter. Motion-picture show shows a fairly standard puddle filter, pump and plumbing.

All sand filters utilize the same bones mechanics: when gear up to Filter, water flows from the puddle, through the filter, and back into the puddle. The filter medium (sand or DE) inside the filter system blocks droppings, clay, and oil. A typical pool filter multiport system has half dozen different settings – Filter, Backwash, Rinse, Broadcast, Airtight, and Waste.

However, when you vacuum your pool a full-bodied level of dirt and debris get deposited in the filter – the result being that the filter becomes dirty and clogged with contaminants that, if left unchecked, will reduce the filter medium's ability to clean and if left could restrict the waterflow and put actress strain on the pool.

What is Backwashing?

The epitome on the left shows regular filtering. The muddy water from the pool comes downward through the sand, impurities are captured, so the h2o travels up through the laterals and standpipe back to the pool. Backwashing is the reverse (image on right). The pool h2o travels through the standpipe and out through the laterals at the lesser, then dorsum up through the sand lifting impurities. It then travels out through the waste outlet taking impurities and dirt with information technology.

Backwashing or aftermath reverses the period of water through the puddle's filter, lifts up and flushes the filter medium (sand or DE), and and so expels the dirty water via a waste material line into the footing or bleed.

Backwashing is essentially the procedure of cleaning the puddle filter and needs to exist washed on a regular ground. More than on that afterwards.

In order to ensure against residual blowback into the pool, once yous've finished backwashing it is highly advisable to rinse the filter. Just as the backwash lifts and flushes the sand, the rinse reseats the sand in its original position for optimum filtration.

Read on to larn how to backwash your pool.

How to Backwash a Sand Filter

Diagram shows the internal workings of a puddle'due south sand filter.

A puddle sand filter uses sand to take hold of contaminants in your pool's water. Pool water is circulated through special filter form pool sand.

From time to time, you will need to clean your sand filter by backwashing it. Here's how to aftermath a sand filter:

1. Turn off the pool pump.
2. Set the sand filter valve handle to the BACKWASH pool position and ensure the handle locks in identify.
3. Turn on the pump and backwash for ii minutes or until the water in the sight drinking glass (located on the filter) is running clear.
4. Turn Off the Pump.
5. Ready the filter valve handle to the RINSE position and ensure the handle locks in identify.
6. Turn on the pump and run the rinse process for 1 minute or until the h2o in the sight glass is clear.
7. Plow Off the Pump.
8. Close the skimmer valves to prevent h2o from entering the filter from the pool. Empty the filter skimmer handbasket and make clean out the pilus catcher.
9. Re-seat and seal the skimmer basket and hair catcher.
10. Reopen the skimmer valves.
11. Reset the Filter Valve to Filter and ensure the handle locks into place.
12. Turn On the Pump.

How to Backwash a DE Filter

Flick shows Diatomaceous Earth or D.E. which is the filter medium inside a D.E. pool filter.

A DE filter uses uses Diatomaceous Globe (DE for curt) instead of sand to catch contaminants. D.E. is a much effectively medium than sand and therefore does a better job at filtering your pool water. However, there is some actress maintenance required when backwashing.

Backwashing a D.Eastward. Filter is similar to a sand filter with one actress pace of topping up the diatomaceous earth.

Of import: before yous start, brand certain you lot have some D.Due east. powder on paw equally you'll need to top up the filter after backwashing. DE become'south washed out when backwashing.

Here's how to dorsum wash DE filters:

1. Switch off the pool pump.
2. Select the Backwash setting on the filter valve.
3. Plough the pump back on and backwash until for 2 minutes or until the water runs clear (you can check this in the sight glass on the side of the filter).
4. Turn the pump off.
5. Select the RINSE setting on the filter valve.
6. Turn the pump back on and rinse for 1-ii minutes. You tin can repeat steps ii to 6 a few times if the filter is particularly muddy.
7. Turn the pump off and select FILTER
8. Add D.E. powder.
   1. Check the manufacturer's instructions as to how much. It volition likely exist iii-half dozen lbs (or about lxxx% of the full capacity of the filter).
   2. Normally you will add this to the skimmer (mix the DE with water start) and/or you lot'll add some D.E. powder in the pump strainer and the rest in the skimmer. Again cheque the manufacturer'southward instructions.
   3. Run the pump on the FILTER setting for xxx minutes or more to allow the D.E. pulverisation to coat the filter grids again.

Can Y'all Backwash a Cartridge Filter?

Replacement cartridge chemical element from a pool cartridge filter.

Pool cartridge filters cannot be backwashed unlike their cousins sand filters and D.East. filters. Cartridge filters are not designed to run "backwards".

However cartridge filters can and should be cleaned on a regular basis. To clean a cartridge filter you lot'll need to open the filter up and remove the cartridge. Rinse and spray the cartridge with the hose every 4 weeks and give it a deep make clean every few months.

Nosotros accept full instructions to deep make clean your cartridge filter in our weblog hither:
How to Clean Puddle Cartridge Filter (Using Muriatic Acid)

How Often to Backwash Pool

As a rule of pollex, regardless of if you have a sand filter or DE filter, you should backwash your puddle about once a week during pond season. The optimal time is right afterwards you vacuum the pool. If your puddle has had a lot more use than normal, it may be necessary to backwash twice a week.

We recommend this suction cleaner and this robotic cleaner.

Likewise, if your puddle is particularly decumbent to leaves, more frequent backwashing may exist necessary since leaves, other debris from trees, and contaminants from birds etc. volition be entering your pool.

You lot tin also tell when information technology is time for a aftermath by checking the filter's pressure guess. Normal operating pressures are between 50 and 170 Kpa (kilopascal) or 10 – 25 psi. When the sand gets dirty and chock-full up, however, the pressure reading rises.

When to aftermath your pool? Use the filter pressure gauge every bit a guide. Information technology's time to backwash when the pressure rises 8-x psi above normal or above lxxx Kpa.

If the pressure level on the gauge is showing 5-ten psi higher than normal, information technology'southward time to aftermath.

If you have already backed washed your pool and the pressure level is yet high, cheque out our article: 8 Reasons Filter Pump Pressure is High (And How to Fix)

When Not to Backwash

If your pool contains an unusually loftier level of dirt (for instance, every bit a result of a nearby construction site, a protracted period of being untended and uncovered, or maybe from runoff caused by flooding) information technology may be advisable to past-pass the filter entirely.

This is also the case if your water had, or has had, an algae problem. Alive algae easily laissez passer through the filter sand and re-enters the pool. And the same goes for dead algae following a stupor treatment. You can read more than on preventing algae here.

In these cases, instead of vacuuming and backwashing, it may be better to vacuum direct to Waste matter, and to send the vacuumed water directly down into the drain.

Important Backwashing Tips

• The one downside of backwashing is that, because water is expelled from the system and sent into waste, is that it…well…wastes water. While this is unavoidable, the key to not overdoing the backwash procedure and flushing out more than water than strictly necessary is to go on a careful eye on the colour and quality of the water in the sight glass.
• Don't backwash more than than necessary, or for longer than necessary. Sand filter systems operate most efficiently during the middle of the filtration bicycle. This is partly due to the positioning, at whatever given time, of the sand in the filter, and partly because of the cyclical build-up of collected clay and debris in the filter. The internet effect is that likewise much or to frequent backwashing really reduces the sand filter'due south efficiency.
• Considering backwashing inevitably washes out some of the sand along with the dirt and debris, from time to time it will be necessary to elevation up the amount of sand in the filter. When yous do add extra sand, run the filter system on RINSE for a minute or so to reduce the corporeality of sand blowback into the pool. We recommend this replacement filter sand here.
• Finally, admittedly brand certain you always turn off the pump earlier y'all either movement or reset the filter valve setting. If you lot don't, you're going to damage, and peradventure destroy the organisation.

Recommended Products

Pool Sand Filter

Replacement Filter Sand

Swimming Pool Vacuum – Automatic Suction Cleaner or Robotic Cleaner

Related reading:

How to Get Sand Out of a Pool

Cloudy Pool Water: Why & How to Remedy

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Source: https://www.myperfectpool.com.au/backwash-pool-sand-filter-often.html

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