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Replacement Filter Cartridges

HOW TO FIND A FILTER CARTRIDGE REPLACEMENT

1. Measure the outside diameter of the cartridge (in inches, +/- 1/32”).
2. Measure the cartridge length (in inches, +/- 1/16”) including end caps but excluding any handles or other extensions. Unicel recommends measuring through the center (if possible) rather than along the outside edge.
3. Identify the cartridge outside edge end cap configuration using the chart on the opposing page. If the top and/or bottom is “open,” measure the inside diameter (in inches, +/- 1/32”) of the top and/or bottom.
4. Record the OEM name and model of the filter the cartridge came out of (if possible).
5. Count the number of pleats (+/- 2) and note whether there is a center core or not.

The information gathered in 1-5 above can then be used to identify a proper replacement. Cartridges are grouped into “series” based on the outer diameter (O.D.) of the cartridge. For example, the 2000 Series is comprised of cartridges between 2 and 2.99 inches in O.D.; the 9000 Series is comprised of cartridges with an O.D. of 9 inches or greater. Note that if the cartridge O.D. is either, for example, 4-15/16” or 6-15/16” it may be necessary to check the next series, the 5000 Series and 7000 Series, respectively.

END CAP CONFIGURATIONS


		2" Male Slip Fitting	1-3/4" Male Slip Fitting	1-1/2" Male Slip Fitting

1-1/2" or 2" SAE Thread	1-1/4" SAE Thread	2" Male Thread/MPT	1-1/2" Male Thread/MPT	Bar Handle

Castle	Castle with Cross Ribs	Closed	Closed with 2" SAE Thread	Closed with 3-Step Edge

Closed with raised Ring	Closed with String Handle	Closed with String Loop	Closed with Y Stand-Offs	Hose Fitting

Injection Molded Cone Adapter	Injection Molded Knob Handle	Male Slip Fitting with Molded O-Ring	Male Slip Fitting with MPT	Molded Cone Handle

Open	Open with 12 Concentric Holes	Open with 12 Concentric Slots	Open with Beveled Edge	Open with Molded Gasket

Open with Molded O-Ring	Open with Slots	Open with Step	Open with Twist Lock	Semi-Circular Handle

Item #	Description
6540-502	Sundance 50 sq ft micro filter for 2002 and above models FC-2812
PL2302	Rainbow Hi-Flow 14.5 sq. ft. filter replacement 2 7/8" diameter x 17 1/6" long with 1 1/16" hole top & bottom. Replaces C-2302, PRB14.5, FC-2320 & AK-1002
PL2303	Rainbow-Chloro 8 1/2 sq. ft. filter 2 7/8" diameter x 17 1/16" long with 2 1/8" opening top & bottom. Replaces C-2303, PRB8.5, FC-2324 & AK-1003
PL4-21	Generic 19 sq. ft. replacment filter 4 5/8" diamter x 8" long with handle on top & 1 1/2" standard threads. Replaces 4CH-21, PTL18P-4, FC-0136 & AK-9003
PL4-22	Freeflow Spas & Image spas 25 sq ft replacement filter 4 15/16" diameter x 6 5/8" length with 2 1/8' open top and 1 1/2" threads on the bottom. Replaces 4CH-22, PFF25P4, FC-2399 & AK-90031
PL4-24	Generic 25 sq. ft. 4 5/8" diameter x 9 3/4" long with a handle on top & 1 1/2" threads on the bottom. Replaces 4CH-24, PTL25P-4, FC-0131 & AK-9004
PL4-30	Generic 30 sg. Ft filter cartridge 4 5/8" diameter x 11 7/8" long with handle on top & 1 1/2" MPT threads on bottom. Replaces 4CH-30, PTL25H-P-4, FC-0141 & AK-9005
PL4301	Martec/Sonfarrel 28 sq. ft replacement filter 4 15/16" diameter x 14 7/8" long with 2 1/8" opening top & bottom. Replaces C-4301, PMT27.5, FC-1616 & AK-3001
PL4305	Cal Spa 50 sq. ft. filter replacement 4 15/16" diameter x 14 7/8" long with 2 1/8" opening top & bottom. Replaces C-4305, PMT50, FC-1617 & AK-3005
PL4310	Skim Filter 10 sq. ft. 4 1/2 diameter x 4" long with 2 1/16" opening top & bottom. Replaces C-4310, PWW10, FC-3077 & AK-30061
PL4321	South Pacific/Inca 25 sq. ft. filter 4 15/16" diameter x 13 5/16" long with top closed with raised ring & 2 1/8" opening on the bottom. Replaces C-4321, PRB25-IN-TC, FC-2372 & AK-30059
PL4325	Hayward 25 sq. ft. replacement filter 4 5/8" diameter x 11 7/8" long with 2 1/16" hole top & bottom. Replaces C-4325, PA225-4, FC-1220, AK-3010 & CX225
PL4326	Filter cartridge 25 sq. ft. 4-15/16' diameter x 13 5/16" long with 2 1/8" opening. Replaces C-4326,PRB25-IN, FC-2375 & AK-3011
PL4335	Generic 35 sq. ft. filter 4 15/16" diameter x 9 1/4" long with 2 1/8" opening top & bottom. Replaces C-4335, PRB35-In, FC-2385 & AK-3015
PL4345	Santanna 45 sq. ft. filter 4 15/16" diameter x 14 7/8" long with closed top & 2 1/8" opening. Replaces C-4345, PST45, FC-2660 & AK-3018
PL4-35	Generic filter 4 5/8" diameter x 16" long with 1 1/2" threads. Replaces 4CH-35, PTL25P-4, FC-0161 & AK-9006
PL4351	Icon Spas 50 sq. ft filter replacement 4 1/4" diameter x 23 3/4" long with a handle on top & 2 15/16" opening w/ molded o-ring. Replaces C-4351, PIC50N, FC-0184 & AK-30056
PL4401	Rainbow/Waterway 35 sq. ft. filter replacment ( 2 cartridges per set) 4 15/16" diameter x 4 5/8" long with 2 1/8" opening top & bottom. Replaces C-4401, PRB17.5SSF-PAIR, FC-2386 & AK-3023
PL4405	RainbowDSF-50/Waterway 50 sq. ft. filter replacemnt (2 filters per set with stick handle) 4 15/16" diameter x 6 5/8" long with 2 1/8" opening top & bottom. Replaces C-4405, PRB25SF-PAIR, FC-2387 & AK-3026
PL4428	Santanna 25 sq. ft. replacement filter 4 15/16" diameter x 9 13/15" long w/ 2 1/8'' opening top & bottom. Replaces C-4428, FC-2620 & AK-3027
PL4429	Nemco 30 sq. ft. filter 4 15/16" diameter x 10 3/8" long with 2 1/8" opening top & bottom. Replaces C-4429, DSF25-50, FC-3082 & AK-3028
PL4449	Santanna 45 sq. ft replacement filter 4 15/16" diameter x 17 3/4" long with 2 1/8" opening top & bottom. Replaces C-4449, PSI45-O-4, FC-2640 & AK-3032
PL4-50	Generic 50 sq. ft. filter cartridge 45/8" diameter x 14 3/4" long with handle on top and 1 1/2 threads on the bottom. Replaces 4CH-50, PTL50P, FC-0151 & AK-9007
PL4625	Rainbow/Waterway 25 sq. ft.filter replacement 4 15/16" diameter x 13 5/16" long with 2 1/8" opening top & bottom. Replaces C-4625, PRB25-IN-4, FC-2370 & AK-3047
PL4-935	Waterway 35 sq. ft. filter replacment 5" diameter x 8 1/2" long with handle on top 2" female SAE threads on bottom. Replaces 4CH-935 & AK-90082
PL4-940	40 sq. ft. Dimension One 4 5/8" x 15" with 1 1/14" SAE threads
PL4950	Filter Cartridge 4 5/16" x 13 5/16" long with 2 1/8" opening. Replaces C-4950,FC-2390,PRB50-IN & AK-3049
PL4-950	Dimension One 50 sq. ft 4 5/8" diameter x 12" long with 1 1/2" SAE threads. Replaces 4CH-950,PDO-UF25P2, FC-0173 & AK-9010
PL4995	Cal Spas/ Waterway 95 sq. ft. 4 15/16" diameter x 23 5/8" long with 2 1/8" opening top and bottom. Replaces C-4995, PCAL100, FC-2940 & AK-3052
PL5-203	LA Spas sock filter substitute 20 sq. ft.filter replacement 5 3/8" diameter x 7" long with closed top & 3" male threads on bottom. Replaces 5CH-203, PLAS35 & AK-90107
PL5315	Intex "B" 15 sq. ft replacement filter 5 3/4" diameter x 10" long with 1 7/8" opening top & bottom. Replaces C-5315, PIN20, FC-3752 & AK-40040
PL5345	Rec. Warehouse/Rainbow 45 sq. ft. replacement filter 5 5/16" diameter x 10 1/8" long with 2 1/8" opening on top & bottom. Replaces C-5345, PLB50, FC-2970 & AK-40042
PL5346	Pacific Marquis 50 sq. ft. old style filter replacement 5 3/16" diameter x 14 1/8" long with a closed top & 1 5/8" opening on the bottom.Replaces C-5346, PPM50TC, FC-3638 & AK-4005
PL5-35	Maxx/Spa Depot 35 sq. ft. filter 5 5/8" diameter x 8" long closed top with 1 1/2" mpt threads. Replaces 5CH-35, PAS35P, FC-0300 AK-90109
PL5351	Coast Spas 150 sq. ft. filter 5 5/16"diameter x 30 1/8" long with 2 1/8" opening top & bottom. Replaces C-5351, PCST120, FC-2976 & AK-40043
PL5374	Rainbow, Waterway & Rec. Warehouse 65 sq. ft. replacement filter 5 5/16" diameter x 14 13/16" long 2 1/8" opening top & bottom. Replaces C-5374, PLBS75, FC-2971 & AK-40081
PL5396	Coast Spas/ Waterway 100 sq. ft. replacement filter 5 5/16" diameter x 21 5/16" long with 2 1/8" opening top & bottom. Replaces C-5396, PCST80, FC-2975 & AK-40082
PL5-402	Sundance Del So 40 sq. ft. filter replacement 5 3/16" diameter x 10 3/4 long with handle on top & 2'' MPT threads on bottom. Replaces 5CH-402, PJW40SC-F2M, FC-2811, AK-90105 & 6540-723
PL5404	Dimension One ozone 40 sq. ft. filter 5 1/2" dimaeter x 17" long 1 15/16" opening & 12 concentric holes on top & 2 7/8" opening on bottom. Replaces C-5404, PDO40-4, FC-3097 & AK-4014
PL5423	Marquis spas (ols style) 35 sq. ft. replacement filter 5 3/16" diameter x 11 15/16" long with closed top & 1 5/8" opening on the bottom. Replaces C-5423, PPM35TC, FC-3623 & AK-4016
PL5-45	45 sq. ft. Freeflow 5 5/16" x 10" with 2 1/8" opening on top and 1 1/2" male threads on bottom
PL5-502	50 sq. ft. Marquis new style replaces C-5303 5 3/16" x 12 1/2" with 2" male threads
PL5601	Jacuzzi Whirlpool 25 Sq Ft filter 5 11/16" diameter x 10 3/8"long with closed top with string loop & 2 1/8" opening on the bottom. Replaces C-5601, OJW23-4, FC-1330 & AK-4021
PL6-35	Generic filter 35 sq. ft., 6" diameter x 9 7/8" long with closed top and 1 1/2" mpt threads. Replaces 6CH-35. PTL35W-P-4, FC-0315 & AK-9013
PL6430	Watkins/Hot Springs 30 sq. ft. filter 6" diamter x 10 1/2" with 1 15/16" opening. Replaces C-6430, PWK30, FC-3915 & AK5005
PL6-47	Cartridge filter 47 sq. ft. 6" diameter x 9 1/8" long with closed top & 1 1/2" mpt threads. Repalces 6CH-47, PTL47W-P, FC-0320, AK-9013 & 373043
PL6-50	Generic 50 sq. ft. filter replacement 6" diameter x 13 5/16" long with handle on top & 1 1/2" standard threads on bottom. Repalces 6CH-50, PTL50W-SV-P-4, FC-0340 & AK-9016
PL6-502	Artesain 50 sq. ft. 6 3/4" diameter x 8'' long with handle on top & 2" standard threads on bottom. Replaces 6CH-502, PAS50SV-F2m & AK-90161