MULTIMEDIA FILTER REPAIR-continued.
Cover a 6-foot (1.83m) square area of the floor in front of lower flange cover with plastic sheet to catch
Remove eight nuts (19), screws (20), flange cover (21), and gasket (22) from top handhole (23).
Weight of media is over 1000 pounds (454 kg). Remove flange cover carefully to avoid
personal injury from flange cover movement.
Remove twelve nuts (24), screws (25), flange cover (26), and gasket (27) from bottom handhole (23).
Be careful while removing filtration material not to damage screens and laterals with
Using a hand scoop, remove filtration material from multimedia filter (17).
Using soap solution and stiff-bristled brush, clean flange covers (21 and 26) and exterior surfaces of filter.
Hose all filter material from laterals and screens.
Flush filter tank with clean water and allow to drain. Turn filter sideways as necessary for complete drainage.
Inspect inside and outside of multimedia filter (17) for cracks, evidence of leaks, damage, and excessive
Inspect flange covers (21 and 26) for excessive corrosion.
Inspect screens on laterals for holes, distortion, corrosion and separation from laterals.
Replace all damaged and unserviceable components.