How to wash pool filter balls without copying the wrong brand
Updated: 21 October 2026
The balls in your sand tank look grey, the pressure is up, and the listing photo made washing sound like one job. How to wash pool filter balls depends on the brand in the tank, not on the photo. Intex allows a backwash, a tap rinse, or a washing machine. Bestway and Steinbach tell you to rinse by hand and do not treat backwash as the method. The seven bags in the [filter balls comparison](/hub/pool-care/filter-balls) mostly say “machine wash” or nothing. This page keeps those instructions apart. A qualifying purchase can earn a commission at no extra cost to you.
The balls in your sand tank look grey, the pressure is up, and the listing photo made washing sound like one job. How to wash pool filter balls depends on the brand in the tank, not on the photo.
The balls in your sand tank look grey, the pressure is up, and the listing photo made washing sound like one job. How to wash pool filter balls depends on the brand in the tank, not on the photo. Intex allows a backwash, a tap rinse, or a washing machine. Bestway and Steinbach tell you to rinse by hand and do not treat backwash as the method. The seven bags in the filter balls comparison mostly say “machine wash” or nothing. This page keeps those instructions apart. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Cleaning stated | Backwash | Material named | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  STEEIRO STEEIRO filter balls, 1800 g | Machine wash in a laundry bag | not stated | not stated | 6.8 | about £13.99 | View offer |
| Best value |  Bomxmon Bomxmon filter balls, 1.54 lb | Washable. A UK review says machine washable. | not stated | not stated | 7.3 | about £9.99 | View offer |
 Intex Intex fiber balls, 500 g (29045) | Machine washable | not stated on the bullets | Fibre balls. Catalogue field says Glass. | 9.3 | about £10.99 | View offer |
On this page
Three cleaning routes, not one
There are three routes, and they are not interchangeable. A machine cycle is a brand permission. A hand rinse in a mesh bag is a different permission. Backwash is a third, and several ball makers say it is not how you clean their media. Pooltime, a UK retailer, says do not assume backwash is enough, and do not use detergent, fabric softener, or a machine unless the maker of those balls allows it. Unplug the pump before you open the tank.
Leave fabric conditioner out. Softener coats fibre. Green water is chemistry, not a wash interval. A cracked tank or an RCD that will not hold is a professional job. How many grams you put back is the filter balls buying guide.
Intex’s route
Intex’s support page is the clearest of the three. You may backwash, you may rinse the balls under running water, and Intex prefers a washing machine. The page does not print a temperature. One UK reviewer of Intex 29045, the 500 g bag at about £10.99, used a 30 degree wash and said the balls came out white after about a month. That 30 degree figure is that review. It is not printed on Bestway’s or Steinbach’s pages.
When the balls go back, compress the bed between Intex’s minimum and maximum marks. The same page says the balls are not a cartridge. If fibre is streaming back, stop and get someone who works on that vessel.
Bestway and Steinbach do not use that route
Bestway’s UK store tells you to hand-rinse Polysphere in the mesh bag and reuse it. The same page says about 4–6 months with proper care, which is a care claim, not a season length. Roys says Bestway sand-filter backwash is not applicable. Steinbach’s UK page says hand wash, not suitable for backwashing, and not tumble dry. Steinbach is not one of the seven ASINs here. Do not machine-wash Polysphere because an Intex bullet said machine washable. Model grams for seasonal pumps are on the above-ground filter balls page.
What these amazon.co.uk bags say
Read the bag you own. Silence is not a hidden permission. Intex 29045 states machine washable. STEEIRO at about £13.99 says machine wash in a laundry bag, without a temperature and without saying the bag is in the box. Bomxmon at about £9.99 says washable. Rakiuty’s 200 g bag says reusable, and a UK review uses a weekly mesh-bag wash. The bullet does not say machine. Windspeed’s bullets do not say washing machine. If the listing is silent, do not invent a 30 degree cycle. Whether you should have left sand in the tank is filter balls vs sand. Do not use bleach. When the balls no longer come clean, or they shed into the water, replace them.
Common questions
Can all filter balls go in the washing machine?
No. Intex allows a machine and prefers it. STEEIRO, yunwailc, and some generic reviews also mention a machine. Bestway Polysphere is a hand-rinse in the mesh bag, and Steinbach says hand wash. If your bag does not mention a machine, do not copy Intex’s route onto it.
What about fabric conditioner?
Leave it out. Pooltime tells you not to use softener unless you have an instruction that allows it, and these sources do not allow it. A UK Windspeed review specifically washed with no fabric conditioner. Softener is a coating, not a rinse aid for filter fibre.
Do I backwash Intex balls?
Intex’s support page allows backwash, a rinse under the tap, or a washing machine, and it prefers the machine. One non-UK owner still had to open the tank because backwash did not clean a dirty fill. Backwash is permitted for Intex. It is not guaranteed to finish the job on a neglected bed.
Do I backwash Bestway Polysphere?
No. Bestway’s listed method is a hand-rinse in the mesh bag. Roys states that Bestway sand-filter backwash is not applicable to Polysphere. Owning a multiport with a backwash position does not override that line, and an Intex machine cycle does not either.
What temperature did a UK reviewer use?
One UK reviewer of Intex 29045 used 30 degrees and reported the balls coming out white. Intex’s support page does not print that temperature. Do not treat 30 degrees as the setting for Bestway, Steinbach, or a generic bag that never mentions a machine.
Should I wash them with clothes?
Only if you can keep detergent and softener off the balls, which a mixed load usually cannot. A mesh bag or a laundry bag is what the Rakiuty review and the STEEIRO bullet describe. Neither listing promises that the bag is in the box. Wash them on their own if you are in doubt.
Can I tumble-dry them?
Not when the maker says otherwise. Steinbach’s UK page says not tumble dry. Intex, Bestway, and the generic bullets in this set do not give you a dryer cycle to follow. Dry them by draining and airing, then refill to the marks your pump maker printed.
Related pages
Sources
Public UK sources for pool filtration, taken from the research digest. Listing prices, stars and review counts are from amazon.co.uk on 19 October 2026.
- HSE — Swimming pool safety (retrieved 19 October 2026)
- PWTAG TN50 — Swimming pool filter specification (retrieved 19 October 2026)
- BSI — BS EN 16713-1:2016 domestic pool filtration (retrieved 19 October 2026)
- SPATA — Swimming pool filtration factsheet (retrieved 19 October 2026)
- Intex support — Fibre ball filtration media (retrieved 19 October 2026)
- Bestway UK — Polysphere pool filtration balls (retrieved 19 October 2026)
- Filterlogic SFL700P pool filter balls (retrieved 19 October 2026)
- Consumer Rights Act 2015, section 9 (retrieved 19 October 2026)