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Limescale in the washing machine - Causes and filters

Limescale in the washing machine

Limescale in the washing machine can worsen washing results, increase detergent use and put stress on the heater and installation components. This category helps choose solutions that reduce scale formation, especially with hard household water.

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Check the key values before choosing a solution.

Convert water hardness Compare common hardness units and better assess the scale of the problem.
Convert water hardness

Water hardness converter

Convert between °dH, mg/L and ppm as CaCO₃.

Hardness (°dH)—
Hardness (mg/L CaCO₃)—
Hardness (ppm CaCO₃)—
Indicative class—

Here ppm refers to hardness as CaCO₃, approximately mg/L in dilute water. A TDS/EC meter reading cannot be used as hardness. Descriptive boundaries: 5, 10, 15 and 21 °dH; these are not a water quality standard.

Assumptions, scope and model version

Here ppm refers to hardness as CaCO₃, approximately mg/L in dilute water. A TDS/EC meter reading cannot be used as hardness. Descriptive boundaries: 5, 10, 15 and 21 °dH; these are not a water quality standard.

Model version
MW-HARDNESS-1.0
Technical basis
1 °dH = 17.848 mg/L CaCO₃
Technical owner
MojaWoda.com
Scope
General hardness unit conversion as CaCO₃. The result does not replace water testing.

There are 27 products.

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Showing 1-24 of 27 item(s)
Active filters
WodaRO BAMBO SOFT 25L Compact Water Softener with Resin
★ 5.0
Reviews: 6

10 people bought this

WodaRO BAMBO SOFT 25 water softener

WodaRO BAMBO SOFT 25 is a compact water softener with a 25 l ion exchange resin bed PUROLITE C100-E. It removes calcium and magnesium ions responsible for hardness, protecting the installation and devices from scale. Equipped with a by-pass, residual hardness mixer, and a backlit programmer in Polish. The set includes, among others, a pre-filter with a drain valve, a hardness tester, and 2x tablet salt.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
25 l
Flow
2.8 m³/h

Brand: WODARO

Free delivery within Poland
Price 500.05 €
FITaqua Washing Machine & Dishwasher Filter for Limescale
★ 5.0
Reviews: 4

38 people bought this

AWF-WSM FITaqua washing machine and dishwasher filter

AWF-WSM FITaqua is a filter for treating cold water supplied to the washing machine or dishwasher. It captures mechanical impurities above 15 micrometers, reduces limescale buildup on the heating element, and helps decrease detergent consumption, improving the effectiveness of washing and cleaning. Installation is simple and requires no tools.
Solution type
Point of use / POU
Installation location
At appliance
Connection
3/4″

Brand: FITAQUA

Price 6.82 €
WFST UST-M Polyphosphate Filter for Washers & Dishwashers
★ 5.0
Reviews: 4

34 people bought this

WFST UST-M washing machine and dishwasher filter

WFST UST-M is a compact filter for the cold water supply to washing machines or dishwashers. The insert with a soluble polyphosphate medium reduces the deposition of limescale, helps dissolve existing deposits, and stabilizes iron compounds, reducing the risk of rust stains on fixtures. The universal 3/4" connection makes installation easy.
Solution type
Point of use / POU
Installation location
At appliance
Connection
3/4″

Brand: USTM

Price 5.34 €
1/2" Brass Water Filter with Polyphosphate for Appliances
★ 5.0
Reviews: 1

2 people bought this

Water Filter 1/2" for Washing Machine Dishwasher Softener OTTONE

Water filter 1/2" BRASS, equipped with a brass head and polyphosphate dispenser, effectively protects water installations and household appliances from limescale buildup, extending their lifespan and improving operational efficiency.
Solution type
Point of use / POU
Installation location
At appliance
Flow
1.2 m³/h
Connection
1/2″

Brand: OTTONE

Free delivery within Poland
Price 48.87 €
HOME 61 WODARO Water Softener with Bypass Mixer
★ 5.0
Reviews: 1

2 people bought this

HOME 61 WATER SOFTENER WODARO Water Softener for Limescale PL

WODARO HOME 61 is a home water softening station that reduces hardness (calcium and magnesium) using the ion exchange method on resin . It operates automatically with regeneration using tablet salt , limits scale in the installation, and protects household appliances and heaters. The set includes, among others, by-pass + mixer for adjusting the degree of softening, a 1" inline pre-filter, and a tester.hardness.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
20 l
Flow
2 m³/h

Brand: WODARO

Free delivery within Poland
Price 379.58 €
WodaRO AV-WSH Washing Machine & Dishwasher Filter

3 people bought this

AV-WSH Washing Machine Dishwasher Filter WaterRO

The washing machine and dishwasher filter effectively cleans the water, eliminating mechanical impurities and organic compounds, protecting household appliances from limescale and extending their lifespan.
Solution type
Point of use / POU
Installation location
At appliance
Connection
3/4″

Brand: WODARO

Price 7.61 €
3/4" Brass Polyphosphate Filter for Appliances OTTONE

3/4" Water Filter for Washing Machine Dishwasher Softener OTTONE

The 3/4" OTTONE water filter, equipped with a brass head and polyphosphate dispenser, effectively protects water installations and household appliances from limescale buildup, extending their lifespan and improving operational efficiency.
Solution type
Point of use / POU
Installation location
At appliance
Connection
3/4″

Brand: OTTONE

Free delivery within Poland
Price 111.15 €
WODARO CITY 41 Water Softener for Apartments

1 person bought this

Water Softener for Home CITY 41 WODARO Water Descaler for Apartment

WODARO CITY 41 is a compact water softener for apartments and homes (1-4 people) that reduces water hardness using the ion exchange method on resin . It protects the plumbing and appliances from scale, and regeneration is performed automatically using salt. You can set the parameters on the LCD panel, and thanks to the by-pass and mixer , you can adjust the degree of softening. The set includes, among others, a 1" pre-filter.hardness tester and salt 25 kg.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
9 l
Flow
1 m³/h

Brand: WODARO

Free delivery within Poland
Price 352.08 €
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