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Belzona® Extends The Life Of Swimming Pool Filters



General Industry (GIND)



Valves, Pipes and Fittings (VPF)


Customer Location:

Swimming pool, Canada


Application Date:

July 2004


Application Situation:

Filter units for a swimming pool.



The filter pots had corroded through in various places. Due to the age of the unit direct replacement not available so replacement of the filter with a new unit would be both expensive and complicated, requiring re-design of pipework.  



Belzona 1311 (Ceramic R-Metal)
Belzona 1321 (Ceramic S-Metal)
Belzona 5811 (Immersion Grade)



Cast Iron


Application Method:

Application was carried out in accordance with Belzona Know-How Leaflets VPF-1 and VPF-2. Plates were bonded over holes and faired with Belzona 1311 before internal surfaces were protected with Belzona 1321 and externals with Belzona 5811. Sealing faces were also modified to improve seal.


Belzona Facts:

Rebuilding with Belzona made for a simple straightforward repair eliminating the need to alter pipe work which would have been the case with new units. Belzona provides long term corrosion protection both internally and externally. Modification of seal face with Belzona to accept flat gasket improved functioning of the filters.


Photographs Description

  1. Condition of unit after blasting showing holes in bottom
  2. Eroded sealing flange
  3. Rebuilt unit coated with Belzona® 1321 on the inside and Belzona® 5811 on the outside. Note reformed sealing flange face.
Case study pic one


 Case study pic two


 Case study pic three




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