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Ahtria Spa Filters
These Filters Meet or Exceed Specifications Set Forth By This Spa Manufacturer.
 
Square Feet
Outer Diameter
Length
17.5
4 15/16"
4 5/8"
Shopping Options
Top
Bottom
2 1/8" Inner Dia
2 1/8" Inner Dia
Same as:
Unicel - C-4401
 Filbur- FC2386
Spa Filter
Spa Filter
Item# PRB17.5SF PR
Set of 2 Required = 35sf

Square Feet
Outer Diameter
Length
25
4 15/16"
6 5/8"
Shopping Options
Top
Bottom
2 1/8" Inner Dia
2 1/8" Inner Dia
Same as:
Unicel - C-4405
 Filbur- FC2387
Spa Filter
Spa Filter
Item# PRB25SF PR
Skim Filter    Set of 2 Required = 50sf

Square Feet
Outer Diameter
Length
30
4 15/16"
10 3/8"
Shopping Options
Top
Bottom
Closed
2 1/8" Inner Dia
Same as:
Unicel - C-4431
Filbur- FC3078
Spa Filter
Spa Filter
Item# DSF25-50 TC

Square Feet
Outer Diameter
Length
50
4 15/16"
13 5/16"
Shopping Options
Top
Bottom
2 1/8" Inner Dia
2 1/8" Inner Dia
Same as:
Unicel - C-4950
Filbur- FC2390
Spa Filter
Spa Filter
Item# PRB50-IN

Square Feet Outer Diameter Length
60 8" 11 5/8"
Shopping Options Top Bottom
Click Here Posi Grip 2" MPT
Same as:
Unicel - 8CH-60
Filbur- FC0510
Spa Filter Spa Filter
Item# PIF60 2A
2" Lock-In Thrd MPT Adptr (Pipe Thrd)
Note: Handle Style Will Vary

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