[1] Certification includes isothalic and vinyl ester resins.
[2] Certification is for 100 psi max operating pressure.
[3] Certification is for precoating of filter in either closed loop or filter cycle.
[4] Certified for Type 1 (< 1500 ppm Sodium Chloride), Type 2 (1500 - 6000 ppm Sodium
    Chloride), and Type 3 (> 6000 ppm Sodium Chloride).
[5] Listed for use with Diatomaceous Earth or Perlite media.
[6] Certification is for slurry feed of filter media during regeneration cycle or dry feed
    of filter media under vacuum into a filter tank empty of water.
[7] Certification is for backwash flow rates of .85 to 2.0 GPM Per Ft² or gravity draining. 
    Backwash flow rate is not required to match filter flow rate.
[8] Certification is for backwash flow rates of .66 to 2.0 GPM Per Ft² or gravity draining. 
    Backwash flow rate is not required to match filter flow rate.

[1] Certification includes isothalic and vinyl ester resins.
[2] -050- or Filters without designation, Certification is for 50 psi max operating pressure
[4] Certification is for contact molded shell.
[6] XXX-XX-A-XXX Notes dual inlet/outlet connections.
[7] XXX-XX-B-XXX Notes single inlet/outlet connections.
[8] Certification includes use of FRP manway cover or manway cover with clear acrylic
    viewing windows.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[13] Filters have been accepted for use with Zeoclere-30 media with an effective size of 0.44
     mm, a design filtration rate of 5-15 gpm, and in accordance with manufacturer's
     instructions.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.

[1] Certification includes isothalic and vinyl ester resins.
[2] -050- or Filters without designation, Certification is for 50 psi max operating pressure
[5] Certification is for filament wound shell.
[6] XXX-XX-A-XXX Notes dual inlet/outlet connections.
[7] XXX-XX-B-XXX Notes single inlet/outlet connections.
[8] Certification includes use of FRP manway cover or manway cover with clear acrylic
    viewing windows.
[10] -E suffix indicates end piped filters.
     –F suffix indicates flange connection.
     -S suffix indicates base tank for end piped, filament wound, stacked filter systems.
     –T suffix indicates threaded connection.
     –Filters without suffix come with flange connection.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[13] Filters have been accepted for use with Zeoclere-30 media with an effective size of 0.44
     mm, a design filtration rate of 5-15 gpm, and in accordance with manufacturer's
     instructions.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.

[1] Certification includes isothalic and vinyl ester resins.
[3] Certification is for 100 psi max operating pressure.
[5] Certification is for filament wound shell.
[6] XXX-XX-A-XXX Notes dual inlet/outlet connections.
[7] XXX-XX-B-XXX Notes single inlet/outlet connections.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[10] -E suffix indicates end piped filters.
     –F suffix indicates flange connection.
     -S suffix indicates base tank for end piped, filament wound, stacked filter systems.
     –T suffix indicates threaded connection.
     –Filters without suffix come with flange connection.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[13] Filters have been accepted for use with Zeoclere-30 media with an effective size of 0.44
     mm, a design filtration rate of 5-15 gpm, and in accordance with manufacturer's
     instructions.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.

[1] Certification includes isothalic and vinyl ester resins.
[2] -050- or Filters without designation, Certification is for 50 psi max operating pressure
[8] Certification includes use of FRP manway cover or manway cover with clear acrylic
    viewing windows.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.
[15] –S suffix indicates 13" filter bed depth
     -D suffix indicates 26.6" filter bed depth
     

[1] Certification includes isothalic and vinyl ester resins.
[3] Certification is for 100 psi max operating pressure.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.
[15] –S suffix indicates 13" filter bed depth
     -D suffix indicates 26.6" filter bed depth
     

[1] Certification includes isothalic and vinyl ester resins.
[2] -050- or Filters without designation, Certification is for 50 psi max operating pressure
[4] Certification is for contact molded shell.
[6] XXX-XX-A-XXX Notes dual inlet/outlet connections.
[7] XXX-XX-B-XXX Notes single inlet/outlet connections.
[8] Certification includes use of FRP manway cover or manway cover with clear acrylic
    viewing windows.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[10] -E suffix indicates end piped filters.
     –F suffix indicates flange connection.
     -S suffix indicates base tank for end piped, filament wound, stacked filter systems.
     –T suffix indicates threaded connection.
     –Filters without suffix come with flange connection.

[1] Certification includes isothalic and vinyl ester resins.
[3] Certification is for 100 psi max operating pressure.
[5] Certification is for filament wound shell.
[6] XXX-XX-A-XXX Notes dual inlet/outlet connections.
[7] XXX-XX-B-XXX Notes single inlet/outlet connections.
[8] Certification includes use of FRP manway cover or manway cover with clear acrylic
    viewing windows.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[10] -E suffix indicates end piped filters.
     –F suffix indicates flange connection.
     -S suffix indicates base tank for end piped, filament wound, stacked filter systems.
     –T suffix indicates threaded connection.
     –Filters without suffix come with flange connection.

[1] Certification includes isothalic and vinyl ester resins.
[3] Certification is for 100 psi max operating pressure.
[5] Certification is for filament wound shell.
[9] Certification includes use of manway cover with clear acrylic viewing windows.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), and Type 3 (> 6000 ppm sodium chloride).
[12] -X suffix indicates number of filters operating in parallel in a bank of filters. All
     filter system operating valves and connecting piping are individually Listed under
     valves and components in NSF Standatrd 50 and meet or exceed the testing requirements.
[13] Filters have been accepted for use with Zeoclere-30 media with an effective size of 0.44
     mm, a design filtration rate of 5-15 gpm, and in accordance with manufacturer's
     instructions.
[14] Filters have been accepted for use with Zeobrite® media with a design filtration rate of
     5-15 gpm and in accordance with manufacturer's instructions.

[1] Certification includes isophthalic, vinyl ester resins for valves 14" and larger or PVC
    for valves 12" and smaller.
[2] Certification is for 100 psi max operating pressure.
[3] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
    chloride), Type 3 (> 6000 ppm sodium chloride), and pool or spa/hot tub.

[2] Certification is for 100 psi max operating pressure.
[3] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
    chloride), Type 3 (> 6000 ppm sodium chloride), and pool or spa/hot tub.

[1] Certification includes isophthalic, vinyl ester resins for valves 14" and larger or PVC
    for valves 12" and smaller.
[2] Certification is for 100 psi max operating pressure.
[3] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
    chloride), Type 3 (> 6000 ppm sodium chloride), and pool or spa/hot tub.

[3] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
    chloride), Type 3 (> 6000 ppm sodium chloride), and pool or spa/hot tub.
[4] Certification includes isophthalic, vinyl ester resins or PVC.
[5] Certification is for 90 psi max operating pressure.
[6] Backwash water sourece, (M) filtered water in multiple tank systems, (e) unfiltered
    water through internal by-pass valve.
[7] Backwash line sealing pressure equal to or greater than internal operating pressure.

[4] Certification includes isophthalic, vinyl ester resins, and PVC for connecting filter
    system piping.
[5] Certification is for 100 psi max operating pressure.
[6] -34 indicates tank diameter
    -42 indicates tank diameter
    -60 indicates tank diameter
[7] NFS-xx-X-xxxxxx-x, -X indicates number of tanks in system, 1 to 8 tanks.
[8] NFS-xx-x-XX-xxxx-x, -XXxxxx indicates influent/effluent pipe size, 3" - 24".
[9] E - End piped filters
    S - end piped stacked filters
    T - Top piped filters
    
    
[10] NFS-xx-x-xxxxXX-x, xxxxXX indicates filter area for top piped single tank filter
     systems.  This segment of part number is not used on multiple tank systems and is
     omitted.
[11] Certified for Type 1 (< 1500 ppm sodium chloride), Type 2 (1500 - 6000 ppm sodium
     chloride), Type 3 (> 6000 ppm sodium chloride), and pool or spa/hot tub.

[1] Beginning serial number for NSF Listed units is NSS A-6-0350.  NSF Listed units have 0
    psi head loss when evaluated at the rated flow or less.

[1] Beginning serial number for NSF Listed units is NSS A-6-0350.  NSF Listed units have 0
    psi head loss when evaluated at the rated flow or less.
[2] Beginning serial number for NSF Listed units is NSS E01 10937. NSF Listed units have 0
    psi head loss when evaluated at the rated flow or less. These strainers are Certified
    with a maximum operating pressure of 30 psi for Pool or Spa/Hot Tub End Use.
[3] Beginning serial number for NSF Listed units is NSS E01 10937. NSF Listed units have 0
    psi head loss when evaluated at the rated flow or less. These strainers are Certified
    with a maximum operating pressure of 65 psi for Pool or Spa/Hot Tub End Use.