Skip to content
Free delivery in Poland from 200 zł
14 days to return your order
Efficient order processing
Technical support 24/7!
Over 27 years of experience

Filters

Price

Filtering products…

Brand

Connection size

Self-Cleaning Filters for Main Water Supply | MojaWoda.com

Self-Cleaning Water Filters

Self-cleaning water filters are installed on the main water supply line to trap sand, rust, silt and other mechanical impurities. The built-in flushing system allows the filter mesh to be cleaned without frequent cartridge replacement. This provides practical protection for plumbing, fixtures, household appliances and subsequent stages of water treatment.

CALCULATE BEFORE YOU CHOOSE

Useful calculators

Check the key values before choosing a solution.

Convert inches and diameters Convert inches to mm and understand nominal sizes.
Convert inches and diameters

Inches to centimetres and millimetres

Converts the international length inch and accepts decimals, fractions and mixed numbers.

Centimetres (cm)—
Millimetres (mm)—

This does not convert nominal pipe or thread sizes.

Assumptions, scope and model version

1 in = 25.4 mm = 2.54 cm

Model version
MW-INCH-1.0
Technical basis
1 in = 25.4 mm exactly
Technical owner
NIST / MojaWoda.com
Scope
Standard length-inch conversion. Use the BSP/NPT thread calculator for pipes and fittings.
Identify BSP/NPT thread Compare thread diameter and standard before buying a fitting.
Identify BSP/NPT thread

BSP/NPT pipe-thread calculator

Compare diameter and pitch for BSPP (G) and NPT. Verify the standard before selecting a fitting.

Approximate diameter (mm)—
Approximate diameter (cm)—
Threads per inch (TPI)—
Thread pitch (mm)—
Indicative table
ThreadNPT femaleNPT maleBSP femaleBSP maleBSPP / NPT TPI
1/8≈ 8.54≈ 10.18≈ 8.57≈ 9.7328 / 27
1/4≈ 11.07≈ 13.54≈ 11.45≈ 13.1619 / 18
3/8≈ 14.49≈ 16.98≈ 14.95≈ 16.6619 / 18
1/2≈ 17.90≈ 21.14≈ 18.63≈ 20.9614 / 14
3/4≈ 23.21≈ 26.49≈ 24.12≈ 26.4414 / 14
1≈ 29.15≈ 33.14≈ 30.29≈ 33.2511 / 11.5
5/4 (1 1/4)≈ 37.87≈ 41.90≈ 38.95≈ 41.9111 / 11.5
6/4 (1 1/2)≈ 43.94≈ 47.97≈ 44.85≈ 47.8011 / 11.5

Diameters are approximate identification values, not manufacturing tolerances. BSPP (G, ISO 228-1) is parallel with a 55° profile; NPT (ASME B1.20.1) is tapered, 60°. Measure NPT at the 4th–5th full thread, without averaging different depths. BSPT (R/Rc) and NPTF require separate verification. Do not join BSP to NPT without a suitable adapter.

Assumptions, scope and model version

Diameters are approximate identification values, not manufacturing tolerances. BSPP (G, ISO 228-1) is parallel with a 55° profile; NPT (ASME B1.20.1) is tapered, 60°. Measure NPT at the 4th–5th full thread, without averaging different depths. BSPT (R/Rc) and NPTF require separate verification. Do not join BSP to NPT without a suitable adapter.

Technical source

Model version
MW-THREAD-2.0
Technical basis
Swagelok MS-13-77, pp. 13–19; ISO 228-1 / ASME B1.20.1
Technical owner
MojaWoda.com
Scope
Diameters are approximate identification values, not manufacturing tolerances. BSPP (G, ISO 228-1) is parallel with a 55° profile; NPT (ASME B1.20.1) is tapered, 60°. Measure NPT at the 4th–5th full thread, without averaging different depths. BSPT (R/Rc) and NPTF require separate verification. Do not join BSP to NPT without a suitable adapter.

There are 6 products.

Sort by:
Showing 1-6 of 6 item(s)
Active filters
★ 5.0
Reviews: 2

EcoWater SMART Automatic Pre-Filter with Backwashing

EcoWater SMART is an automatic pre-filter for cold water, installed on the main supply line. It removes mechanical impurities and suspensions, trapping them on a stainless steel mesh (100 microns). The cartridge is automatically flushed (cycle 1-99 days), and the impurities are directed to the sewage system. The filter also features manual flushing, a brass head, a check valve, and a pressure reducer.
Filtration rating
100 µm
Flow
50 l/min
Connection
1″

Brand: ECOWATER

Free delivery within Poland
Delivery to your chosen address | 14-day returns
Price 2,279.00 zł
★ 5.0
Reviews: 1

FK74CS-5/4AA Honeywell water filter with pressure regulator controller

Honeywell FK74CS-5/4AA is a filtering-regulating station for drinking water: fine mesh filter with backwashing + pressure regulator. It stops particles of rust and sand while stabilizing the pressure in the system. The transparent, impact-resistant housing facilitates dirt control. Connection 5/4" (external thread), horizontal or vertical installation.
Filtration rating
110 µm
Connection
1 1/4″
Maximum working temperature
30 °C

Brand: HONEYWELL

Free delivery within Poland
Delivery to your chosen address | 14-day returns
Price 2,438.00 zł
Temporarily out of stock Aquafilter FHPR1-3V_R Self-Cleaning Whole House Filter

FHPR1-3V_R Self-Cleaning Water Filter for the Whole House

Aquafilter FHPR1-3V_R is a self-cleaning water filter for the entire house for cold water. The three-element design facilitates servicing in areas with limited height, and the drain valve allows for flushing the cartridge under pressure without disassembly. The set includes a housing with 1" brass threads and a reusable mesh cartridge FCPNN50M 50 microns for trapping sand and sediments.
Filtration rating
50 µm
Connection
1″
Housing standard
Slim 10″
Maximum working temperature
42 °C

Brand: AQUAFILTER

Delivery to your chosen address | 14-day returns
Temporarily out of stock Self-Cleaning Whole-House Water Filter with Flush Valve

FHPR34-3V_R Self-Cleaning Water Filter for the Whole House

Self-cleaning cold water filtration system for the whole house: Aquafilter FHPR34-3V housing with 3/4 inch brass threads, reusable FCPNN50M cartridge, pressure flushing drain valve, and mounting accessories. The three-element design facilitates operation in areas with limited mounting height, without the need to unscrew the cover down.
Connection
3/4″
Housing standard
Slim 10″

Brand: AQUAFILTER

Delivery to your chosen address | 14-day returns

DIAMOND 3/4 Mechanical Water Filter Self-Cleaning Inline Pre-Set

The self-cleaning mechanical filter DIAMOND 3/4" is a pipe solution for the preliminary protection of the water installation against sand, rust, and contaminants after installation. Backwashing allows for the removal of sediment without disassembly, and the drain valve facilitates the emptying of contaminants from the housing. The built-in manometer enables ongoing monitoring of operating pressure.
Connection
3/4″

Brand: DIAMOND

Delivery to your chosen address | 14-day returns
Price 155.00 zł

FHPR12-3V_R Self-Cleaning Water Filter for the Whole House

FHPR12-3V_R is a self-cleaning water filter for cold water installations in the home. The three-piece housing facilitates servicing in areas with limited height, and the drain valve allows for quick flushing of the cartridge without disassembly. The set includes the Aquafilter FHPR12-3V housing with 1/2" brass threads, a reusable mesh cartridge FCPNN50M, and a complete set of mounting accessories.
Connection
1/2″
Housing standard
Slim 10″

Brand: AQUAFILTER

Delivery to your chosen address | 14-day returns
Price 139.00 zł