Our fiberglass pressurized filters are the best option for pretreatment of salt and brackish water in the reverse osmosis process due to its total corrosion resistance.

Manufactured with internal barrier of isophthalic resin and ex-termo winding reinforcement of GRP in accordance with the UNE-EN13121 standard.

Design of collecting system, cylindrical length and connections according to requirements. We have the ability to manufacture the filters according to the specifications of each project.


ØSHHÁrea de filtración / Filtration area
ØBTÁrea de filtración / Filtration area


For all filters

Lateral manhole
Ref – B / Y / A

B- Injection lateral slots 0.3mm for general filtration

Y- Injection lateral slots 0.2mm for exchange applications

A- Lateral slots with grooved PVC pipe 0.5mm

Multiple diffuser
Ref – M / R / S

M- Multiple diffuser with holes for filtration applications
in general.

Multiple diffuser for ion Exchange or activated carbon with slotted injection grooved.
R- With slots of 0,2mm.
S- With slots of 0,5mm.

Collector system of nozzle plate
Ref – P / X

P- Nozzle plate with nozzle slots of 0.5mm for air washing

X- Nozzle plate with nozzle slot of 0.2mm or ion exchange

Sight Glass
Ref – S

Material PMMA (polymethacrylate) filter with vinyl ester coated glass borosilicate trembled. For observation of the inside of the filter, level of filter medium and expansion during washing. It can be placed one by one in different positions. By default, it is placed centered with the maximum level of the filtered bed and to the left of the connections.

Lateral manhole
Ref – L1 / L2 / L4 / L5 / L6

Lateral manhole. By default, it is placed to the right of the connections. Manufactured in GRP with nuts and bolts in AISI 316 stainless steel and EPDM gasket. It can be placed in different positions according to customer requirements.

Top Manhole
Ref – T5 / T6

Top manhole Ø400 (16”) for access and loading of the media filter. It is placed as a standard part and it is centered on the filter. Ask the possibility of placing off-center if desired according to models.

T5- Top manhole Ø500 (20’’)
T6- Top manhole Ø600 (24’’)

Vinyl-ester internal coating
Ref – V

Vinyl-ester internal coating. Vinyl-ester internal coating for greater chemical resistance for ozone applications. Maximum resistance in continuous 0.5pprm. Promptly up to 2pprm.

External UV protection
Ref – U

External UV protection. Extra layer that is applied to filter for greater UV protection. Recommended in case of outdoor installation.

Salt water contact
Ref – W

Salt water contact. Compatible with vinyl ester coating or drinking water. Suitable for saline water contact.

Drinking water
Ref – H

Not compatible with vinyl ester coating. Suitable for drinking water.

Standard colors

Standard colors: RAL 5015 blue. Ask for other colors to our Sales team.

For vertical filters

Ref – E

E- Central funnel diffuser for filtration applications in general. They are mounted as standard unless another option is requested.