Spa Filters & Hot Tub Filter Cartridges

Product References

Filtration Sizes / Dimensions

Price

Pleatco: PRB17.5SF
Unicel: C-4401
Filbur: FC-2386

17.5 sq ft per filter - sold as 35 sq ft pair
Outside diameter: 4 15/16" (12.5cm)
Top finish: 2 1/8" (5.4cm) hole
Bottom finish: 2 1/8" (5.4cm) hole
Length: 4 5/8" (11.75cm)
Pleat count: 158

Pleatco: PRB251N
Unicel: C-4326
Great Barrier: 8512
Filbur: FC-2375

25 sq ft
Outside diameter: 4 15/16" (12.5cm)
Top finish: 2 1/8" (5.4cm) hole
Bottom finish: 2 1/8" (5.4cm) hole
Length: 13 5/16" (33.8cm)
Pleat count: 106

Pleatco: PRB501N
Unicel: C-4950
Filbur: FC-2390
Great Barrier: 8510

50 sq ft
Outside diameter: 4 15/16" (12.5cm)
Top finish: 2 1/8" (5.4cm) hole
Bottom finish: 2 1/8" (5.4cm) hole
Length: 13 5/16" (33.8cm)
Pleat count: 212

Pleatco: PRB75
Unicel: C-4975
Filbur: FC-2395

75 sq ft
Outside diameter:  4 15/16" (12.54cm)
Top finish: 2 1/8" (5.4cm) open hole
Bottom finish: 2 1/8" (5.4cm) open hole
Length: 20 1/8" (51.12cm)
Pleat count: 210

Pleatco: PRB351N3
Unicel: C-4335 / C-4335-RA
Great Barrier 8514
Filbur: FC-2385

35 sq ft
Outside diameter: 4 15/16" (12.54cm)
Top finish: 2 1/8" hole (5.4cm)
Bottom finish: 2 1/8" hole (5.4cm)
Length: 9 1/4" (23.5cm)
Pleat count: 219

Pleatco: PCST80
Unicel: C-5396
Filbur: FC-2975

80 sq ft
Outside diameter: 5 5/16" (13.5cm)
Top finish: 2 1/8" (5.4cm) hole
Bottom finish: 2 1/8" (5.4cm) hole
Length: 21 5/16" (54.2cm)
Pleat count: 222

Pleatco: PWK30
Unicel: C-6430
Filbur: FC-3519
Hot Springs: 31489

30 sq ft
Outside diameter: 6" (15.2cm)
Top finish: 1 15/16" (4.9cm) hole
Bottom finish: 1 15/16" (4.9cm) hole
Length: 10 1/2" (26.7cm)
Pleat count: 124

Pleatco: PWK65
Unicel: C-8465
Filbur: FC-3960
Hot Springs: 31114

65 sq ft
Outside diameter: 8 1/2" (21.6cm)
Top finish: 3" (7.6cm) hole
Bottom finish: 3" (7.6cm) hole
Length: 10 1/4" (26cm)
Pleat count: 234

Pleatco: PSD125-2000
Unicel: C-8326
Filbur: FC-2780
Sundance: 6472-488

125 sq ft
Outside diameter: 8 7/16" (21.4cm)
Top finish: 2" (5.1cm) male slip
Bottom finish: 2 1/2" (6.4cm) hole with bevelled edge
Length: 19" (48.3cm)
Pleat count: 199

Pleatco: PD075-2000
Unicel: C-7367
Filbur: FC-3059
Dimension One:
1561-00

75 sq ft
Outside diameter: 7 1/8" (18.10cm)
Top finish: Closed with Y stand-offs
Bottom finish: 2" (5.1cm) open hole with twist lock
Length: 10 1/2" (26.67cm)
Pleat count: 215

Pleatco: PHC25 / PSG25
Unicel: 4CH-20
Filbur: FC-0125
Saratoga: 20241-238

20 sq ft
Outside diameter:  4 5/8" (11.7cm)
Top finish: Moulded cone handle
Bottom finish: Fine male 1 1/2" (3.8cm) MPT thread
Length: 6 3/4" (17.1cm)
Pleat count: 204

Pleatco: PGS25
Unicel: 4CH-24
Flibur: FC-0131
Satatoga: 20254-238

25 sq ft.
Outside diameter:  4 5/8" (11.7cm)
Top finish: Moulded cone handle
Bottom finish: Fine male 1 1/2" (3.8cm) MPT thread
Length: 9 3/4" (24.8cm)
Pleat count: 173

Pleatco: PA13
Unicel: 4CH-19
Filbur: FC-0122

13 sq ft.
Outside diameter:  4 5/8" (11.75cm)
Top finish: Moulded cone handle
Bottom finish: Fine male 1 1/2" (3.8cm) MPT thread
Length: 4 5/8" (11.75cm)
Pleat count: 199

Pleatco: PM50-SC
Unicel: 5CH-352
Filbur: FC-0196M
Great Barrier: 8542

35 sq ft
Outside diameter: 5 3/16" (13.2cm)
Top finish: Handle
Bottom finish: 2" (5.1cm) MPT thread
Length: 12 1/2" (31.8cm)
Pleat count: 151

Pleatco: PPM50-SC
Unicel: 5CH-502
Filbur: FC-0195
Great Barrier: 8540

50 sq ft
Outside diameter: 5 3/16" (13.2cm)
Top finish: Handle
Bottom finish: 2" (5.1cm) MPT thread
Length: 12 1/2" (31.8cm)
Pleat count: 197

Pleatco: PWW50
Unicel: 6CH-940 / 6CH-940-RA
Filbur: FC-0359
Great Barrier: 8550

45 sq ft
Outside diameter: 6" (15.2cm)
Top finish: Handle
Bottom finish: Coarse male SAE 1 1/2" (3.8cm) thread
Length: 8 1/4" (21cm)
Pleat count: 225

Pleatco: PD075
Unicel: 7CH-975
Filbur: FC-0475
Dimension One:
1561-12

52 sq ft
Outside diameter: 7" (17.8cm)
Top finish: Handle
Bottom finish: Coarse male SAE 1 1/2" (3.8cm) thread
Length: 10 1/2" (26.7cm)
Pleat count: 216

Spa-n-a-Box Filter

4 5/8" x 2 3/4" - old style

Spa 2 Go Filter / New style Spa-n-a-Box Filter

7 3/4" x 4 1/2"