domestic range

Cintropur Domestic Filters

Water filter housing range to remove solid particles from water supplies, capable of filtration from 300 micron down to 1 micron and designed as low pressure drop in order to maximise water flow. The TIO, NW 25, NW 25 TE-CTN and NW 32 TE versions are designed to be used with Activated Carbon for the improvement of taste and odour, chlorine, pesticide and other dissolved organic substance removal.

Residential Applications – Protection of sanitary networks supplied with domestic water, rainwater or well water. Filtration of water before water softener, reverse osmosis or UV filter.

Industrial Applications – Protection of sanitary networks, machine tools and all industrial machinery for water treatment. Filtration of water before high pressure cleaning machines (100 to 200 bar / 1500 to 3000 psi) and very high pressure cleaning machines (1500 to 2500 bar / 21000 to 35000 psi). 

Agricultural Applications – Filtration of water (spraying) installations. Filtration of water for animals, filtration of rainwater and well water.


Filter typeNW 18NW 25NW 32TIONW 25
NW 25
NW 32 TE
Diameter of pipe3/4”3/4” or 1”11/4”1”3/4” + 1”1”11/4”
Average flow rate : m3/h3.*0.5*0.5*0.5*
Working pressure : bar10101010101010
Max. operating pressure : bar16161616161616
Max. operating temp °C50° C50° C50° C50° C50° C50° C50° C
Weight : Kg0.
Standard filter sleeve25 μ25 μ25 μ25 μ25 μ--
Available volume : Ltr---0.570.570.570.70
Filtration Pressure :1904508403351 x 450--
Cintropur Centrifugal Filter Technical Drawing


Instructions for assembly, use and maintenance NW 18 – 25 – 32 & 25 TE (-CTN) + NW 32TE + DUO (-CTN) + TIO


The range of water filters CINTROPUR® NW 18 -25 -32 is designed for filtering clear water with only low levels of substances in suspension, of the types town water, rainwater, borehole water, spring water.

Other types of non-aggressive liquid can also be filtered. The possible areas of use will be in domestic, industrial, public and agricultural situations. The materials used for making the filter are suitable for filtering liquid foods. The use of the 25 TE-CTN + NW32 TE + DUO-CTN + TIO with activated carbon is well known for dechlorination, removal of odours, improvement of taste, reduction of pesticides and herbicides.

Technical Description

Installation and use of the filters NW 18 – 25 – 32 – 25 TE (-CTN) – 32 TE – DUO (-CTN) – TIO must be compatible with the technical requirements stated in the following table:

Connector diameter3/4’’¾ & 1’’5/4’’1’’5/4’¾’’ & 1’’1’’
Mean throughput (m³/h) with
ΔP=0.2 bar*0.5*0.5*0.5*
Operating pressure (bar)10101010101010
Max. working pressure (bar)16161616161616
Max. operating temperature50°C50°C50°C50°C50°C50°C50°C
Weight (kg)
Filter screen25μ25μ25μ--25μ25μ
Bowl volume (litres)---0.571.70.570.57
Filter area (cm²)190450840-450335

Assembly and handling

The filters must be fitted using the correct procedures, by qualified personnel: they must be free of mechanical stress, with the piping upstream and downstream aligned. The distance between the couplings must be correct to avoid causing any tension or compression stress on them.

The ideal location for the CINTROPUR®  water filter is directly at the plant inlet (after the meter or the pump). Ensure that the direction of water flow corresponds to the direction of the arrow on the filter head.

The pressure reducer will effectively reduce the supply pressure if it exceeds the operating pressure. An anti-water-hammer device is essential if they are known to occur in the installation.

The filter is supplied complete and ready to install. The equipment supplied includes a set of 2 threaded connectors (except with the DUO where there are 2 connectors of size .’’ and 2 connectors of size 1″), a 25μ filter screen (except all TE models) and a spanner for disassembly. The only available options are wall mounting, the pressure gauges and the bleed valve (on all models that have the filter screen).

The optionally supplied dry pressure gauges (0 – 10 bar) have a standard 1/8″ thread; fitting is done using a spanner (the dial is not to be used as a handle for screwing it in) after through drilling and tapping the pressure-gauge holes in the head. In this case the wall mount cannot be installed. It is never permissible to use the pressure gauges as fixings for the wall mount.

Fixing the wall mount to the head is done using the two bolts (M8 Allen head) provided for this purpose. Lightly tightening these is adequate for a good hold.

The tightness of the threaded connections can be achieved with any of the usual trade products. However, the hemp and paste from Kolmat is to be preferred. Leave one thread turn free on the filter connector to provide a good start for the valve or connector of your installation.

Using removable connections will enable the filter to be easily removed from the installation at a later date if necessary.

The tightness between the connector and the filter head is ensured by a sealing ring; hand tightening is sufficient. The tightness between the head and the bowl is ensured by a sealing ring: hand-tightening is sufficient. The spanner is for disassembly.

If you choose the valve option, its nickel-plated brass adapter is factory-fitted with a teflon seal. This assembly (adapter + .’’ valve) must be hand-fitted to the bottom of the bowl. The sealing between the male thread of the adapter and the bowl is ensured by an O-ring; Tightening this assembly (adapter + .’’ valve) will be a maximum of . turn of the O-ring blocked against the bowl.

The cylindrical support of the filter screen is fitted at the 2 ends with a centrifugal spinner and a sealing cover. The purpose of the latter is to provide the sealing between the unfiltered water and the filtered water. The largest part of the support will be placed in centrifugal spinner.

Fitting isolating valves upstream and downstream of the filter is advised for assisting maintenance of the filter.

Filling the bowl of the models TE – DUO – TIO with the treatment material (activated carbon, polyphosphate etc.) is made easier by following the rules stated in the appendix.

There is no model NW18TE


Before disassembling the bowl, close the upstream and downstream valves and release the pressure. Maintenance and replacing the filter screen for drinking water is advised at least twice per year. The filters graded 5, 10, 25, 50 & 100μ are intended for a single use. Cleaning them would change the structure of the fibre, so degrading the fineness of the selected filtering and making the filter more fragile, which could lead to tearing.

The nylon filters graded 150 & 300 μ are designed to be cleaned and re-used. Replacement of the activated carbon in the models TE – DUO – TIO for drinking water is necessary every 12 m3, and in other cases at least every 6 months.

The thread of the bowl must stay clean and greased for easy fitting and removal of the bowl during its life time. The sealing ring between the head and the bowl must also remain clean and greased for good sealing. Plan to replace it every 5 years. All slots and O-ring seatings must remain clean and without burrs.

Every component of the filter, even if only slightly damaged, must be replaced immediately to ensure good performance under pressure and water-tightness of the whole filter.


The choice of high-quality raw materials for manufacturing each component of your filter is the best guarantee of giving you full satisfaction for many years of use.

If, nevertheless, a component develops a fault related to a manufacturing defect, this would be covered by a replacement of that component under guarantee


Cintropur Exploded Diagram
£2.50 - £2.08 (exc. VAT)
£21.30 - £17.75 (exc. VAT)
£3.00 - £2.50 (exc. VAT)
£3.76 - £3.13 (exc. VAT)
£25.00 - £20.83 (exc. VAT)
£5.10 - £4.25 (exc. VAT)
£27.00 - £22.50 (exc. VAT)
£21.00 - £17.50 (exc. VAT)
£20.00 - £16.67 (exc. VAT)
Cintropur Exploded Diagram
£2.50 - £2.08 (exc. VAT)
£31.00 - £25.83 (exc. VAT)
£3.00 - £2.50 (exc. VAT)
£3.76 - £3.13 (exc. VAT)
£42.00 - £35.00 (exc. VAT)
£5.10 - £4.25 (exc. VAT)
£27.00 - £22.50 (exc. VAT)
Cintropur Exploded Diagram
£2.50 - £2.08 (exc. VAT)
£58.00 - £48.33 (exc. VAT)
£3.00 - £2.50 (exc. VAT)
£15.00 - £12.50 (exc. VAT)
£3.76 - £3.13 (exc. VAT)
£83.00 - £69.17 (exc. VAT)
£5.10 - £4.25 (exc. VAT)
£27.00 - £22.50 (exc. VAT)
£21.00 - £17.50 (exc. VAT)
£20.00 - £16.67 (exc. VAT)

Need Help?

We can advise on the correct sizing for your water filter housing.
Please contact us on
01629 363311

we are more than happy to help.