Replacement Filters for Hot Spring Spas
PRB25-IN - Dynamic Series I RDC-25, I RDC-25S, Dynamic Series II & II RTL/RCF-25, Dynamic Series IV-DFM, DFML, Waterway 25 In-Line, Custom Molded Products
Size
Width: 5 "
Length: 13 5/16 "
Top: 2 1/8 "
Bottom: 2 1/8 "
Surface Area: 25 sqft.
Media Weight: 3 oz/sqyd
This filter has standard media. Upgrade to the anti-microbial version here:
PRB25-IN-M

Cross-Reference
Unicel: C-4326
Filbur: FC-2375
Clarathon: FC-2375
UPC:
090164253008
OUR LOW PRICE
$18.95
List Price: $26.99
PTL35P4-4 - Hot Spring Spas (Watkins), Top Load
Size
Width: 4 3/4 "
Length: 15 "
Top: Handle
Bottom:
MPT
Surface Area: 35 sqft.
Media Weight: 4 oz/sqyd
Cross-Reference
Unicel: 4CH-35
Filbur: FC-0161
Clarathon: FC-0161
UPC:
090164999500
OUR LOW PRICE
$38.95
List Price: $48.99
PWK25-4 - Watkins Hot Spring Spas 45
Size
Width: 6 1/4 "
Length: 11 7/8 "
Top:
Bottom:
Surface Area: 25 sqft.
Media Weight: 4 oz/sqyd
Cross-Reference
Unicel:
Filbur:
Clarathon:
UPC:
090164250083
OUR LOW PRICE
$34.95
List Price: $42.99
PWK30 - Watkins Hot Spring Spas
Size
Width: 5 7/8 "
Length: 10 1/2 "
Top:
Bottom:
Surface Area: 30 sqft.
Media Weight: 3 oz/sqyd
This filter has standard media. Upgrade to the anti-microbial version here:
PWK30-M

Cross-Reference
Unicel: C-6330
Filbur: FC-3915
Clarathon: FC-3915
UPC:
090164033006
OUR LOW PRICE
$21.95
List Price: $30.99
PWK30V - Watkins Hot Spring Spas FH/IH 220V Models
Size
Width: 5 "
Length: 10 3/8 "
Top: 1 9/10 "
Bottom: 1 9/10 "
Surface Area: 30 sqft.
Media Weight: 3 oz/sqyd
Cross-Reference
Unicel: C-5431
Filbur: FC-3910
Clarathon: FC-3910
UPC:
090164303000
OUR LOW PRICE
$34.95
List Price: $43.99
PWK35 - Watkins Hot Spring Spas 33
Size
Width: 6 "
Length: 9 "
Top:
Bottom:
Surface Area: 35 sqft.
Media Weight: 3 oz/sqyd
Cross-Reference
Unicel: C-6433
Filbur: FC-3920
Clarathon: FC-3920
UPC:
090164000350
OUR LOW PRICE
$34.95
List Price: $42.99
PWK40 - Watkins Hot Spring Spas
Size
Width: 6 3/8 "
Length: 12 "
Top:
Bottom:
Surface Area: 40 sqft.
Media Weight: 3 oz/sqyd
Cross-Reference
Unicel: C-6600
Filbur: FC-3930
Clarathon: FC-3930
UPC:
090164400075
OUR LOW PRICE
$39.95
List Price: $50.99
PWK45N - Watkins Hot Spring Spas
Size
Width: 8 1/2 "
Length: 10 9/16 "
Top:
Bottom:
Surface Area: 45 sqft.
Media Weight: 3 oz/sqyd
This filter has standard media. Upgrade to the anti-microbial version here:
PWK45N-M

Cross-Reference
Unicel:
Filbur:
Clarathon:
UPC:
090164457000
OUR LOW PRICE
$42.95
List Price: $69.99
PWK45-O-4 - Watkins Hot Spring Spas Model P 1986
Size
Width: 8 1/2 "
Length: 12 5/16 "
Top: 1 9/10 "
Bottom: 1 9/10 "
Surface Area: 45 sqft.
Media Weight: 4 oz/sqyd
Cross-Reference
Unicel:
Filbur:
Clarathon:
UPC:
090164406008
OUR LOW PRICE
$65.95
List Price: $90.99
PWK50 - Watkins Hot Spring Spas bulkhead connection 50 SF
Size
Width: 8 1/2 "
Length: 11 7/8 "
Top: Handle
Bottom:
Bulkhead
Surface Area: 65 sqft.
Media Weight: 3 oz/sqyd
Cross-Reference
Unicel:
Filbur:
Clarathon:
UPC:
090164823300
OUR LOW PRICE
$55.95
List Price: $74.99
PWK65 - Watkins Hot Spring Spas upgrade from PWK45N
Size
Width: 8 1/2 "
Length: 10 1/2 "
Top:
Bottom:
Surface Area: 65 sqft.
Media Weight: 3 oz/sqyd
This filter has standard media. Upgrade to the anti-microbial version here:
PWK65-M

Cross-Reference
Unicel: C-8465
Filbur: FC-3960
Clarathon: FC-3960
UPC:
090164006024
OUR LOW PRICE
$46.95
List Price: $74.99