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HOW TO FIND A FILTER CARTRIDGE REPLACEMENT

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

Unicel 4000 Series Filters

3-1-12

Search tips:

The series of the filters (i.e. 2000 series) indicates the diameter of the filter. For example if you had a filter that is 2-3/4" wide then it would be a 2000 series filter. If you had a filter that was 7-1/2" in diameter it would be a 7000 series filter. 

Special filters that are closed on the top and have male threads on the bottom would be found in the CH series filters. The first number in the part number would indicate the diameter of the filter as indicated above. Example 6CH50 would be about 6" in diameter.

All measurements are in inches and top and bottom are open unless noted. To match handle types see the chart below or click on the handle description.

Unicel #

Manufacture

Square Ft.

Pleat Count

Top

Bottom

OD

Length

Price

QTY

C-4301

Martec, Sonfarrrel

28

106

2-1/8"

2-1/8"

4-15/16"

14-7/8"

$22.95

Quantity:
 

 

C-4302

Pleatco,Soft Sider(1)

12

177

Molded Cone

1-9/10"

4-5/8"

4-5/8"

$15.95

Quantity:
 

 

C-4303

PLeatco, Softsider(2)

15

150

Molded Cone

1-9/10"

4-5/8"

6-3/4"

$19.95

Quantity:
 

 

C-4304

SLM, Buddy-L (3)

N/A

51

Closed

1-15/16"

4-1/4"

8"

$8.95

Quantity:
 

 

C-4305

Cal Spas, Martec (4)

50

193

2-1/8"

2-1/8"

4-15/16"

14-7/8"

$29.95

Quantity:
 

 

C-4306

General Foam & Plsts

5

51

1-3/4"

1-3/4"

4-1/4"

8"

$8.95

Quantity:
 

 

C-4307

General Foam & Plsts

7

60

1-3/4"

1-3/4"

4-3/4"

8"

$12.95

Quantity:
 

 

C-4308

Sonfarrel

25

94

2-1/8"

2-1/8"

4-15/16"

14-9/16"

$19.95

Quantity:
 

 

C-4309

General Foam & Plsts

10

86

1-3/4"

1-3/4"

4-3/4"

8"

$10.95

Quantity:
 

 

C-4310

Skim filter

10

216

2-1/16"

2-1/16"

4-1/4"

4"

$13.95

Quantity:
 

 

C-4311

Spa Filter

45

212

2-1/8"

2-1/8"

4-15/16"

12-1/4"

$29.95

Quantity:
 

 

C-4312

Hayward C-120-RE

12

66

2-1/16"

2-1/16"

4-5/8"

11-7/8"

$15.95

Quantity:
 

 

C-4313

Aqua Leisure, Intex D

2.5

52

2-1/16"

2-1/16"

4-1/4"

3-3/4"

$10.95

Quantity:
 

 

C-4315

Icon Spas

15

163

Semi-Circle

2"

4-1/4"

7-1/8"

$17.95

Quantity:
 

 

C-4316

Splash Tub

16

177

Closed

1-9/10"

4-15/16"

5-1/2"

$26.95

Quantity:
 

 

C-4320

Hayward CX-200-RE

20

110

2-1/16"

2-1/16"

4-5/8"

11-7/8"

$16.95

Quantity:
 

 

C-4321

Rainbow Leaf Canist

N/A

106

Closed w/wing

2-1/8"

4-15/16"

13-5/16"

$19.95

Quantity:
 

 

C-4324

Pletco skim filter (5)

25

173

Cone Handle

1-9/10"

4-5/8"

9-3/4"

$25.95

Quantity:
 

 

C-4325

Hayward CX-225-RE

25

138

2-1/16"

2-1/16"

4-5/8"

11-7/8"

$18.95

Quantity:
 

 

C-4326

Rainbow (6)

25

106

2-1/8"

2-1/8"

4-15/16"

13-5/16"

$18.95

Quantity:
 

 

C-4328

Santanna

25

148

Closed

2-1/8"

4-15/16"

9-13/16"

$27.95

Quantity:
 

 

C-4329

Icon Spas

25

167

Semi-Circle

2"

4-1/4"

12"

$25.95

Quantity:
 

 

C-4332

Martec, Sonfarrel (7)

32

154

2-1/8"

2-1/8"

4-15/16"

11-7/8"

$21.95

Quantity:
 

 

C-4335

Rainbow (8)

35

219

2-1/8"

2-1/8"

4-15/16"

9-1/4"

$25.95

Quantity:
 

 

C-4339

Waterway Plastics

40

216

2-1/8"

2-1/8"

4-15/16"

11-1/4"

$27.95

Quantity:
 

 

C-4340

Dimension One Spas

40

197

2-1/8"

2-1/8"

4-15/16"

11-5/8"

$24.95

Quantity:
 

 

C-4345

Santanna

45

173

Closed

2-1/8"

4-15/16"

14-7/8"

$30.95

Quantity:
 

 

C-4346

Santanna

45

143

Closed

2-1/8"

4-15/16"

17-3/4"

$32.95

Quantity:
 

 

C-4347

Santanna

45

173

2-1/8"

2-1/8"

4-15/16"

14-7/8"

$35.95

Quantity:
 

 

C-4349

Advantage Electric

50

155

2-1/8"

2-1/8"

4-15/16"

17-3/8"

$28.95

Quantity:
 

 

C-4350

Grecian Spa

50

138

2-1/16"

2-1/16"

4-5/8"

23-3/4"

$32.95

Quantity:
 

 

C-4351

Icon Spas

50

202

Semi-Circle

2-5/16"

4-1/4"

23-3/4"

$29.95

Quantity:
 

 

C-4360

Icon Spas

60

190

Semi-Circle

2"

4-1/4"

23-3/4"

$37.95

Quantity:
 

 

C-4401

Rainbow, Waterway

35

158

2-1/8"

2-1/8"

4-15/16"

4-5/8"

$30.95

Quantity:
 

 

C-4402

Aqua Spa

20

138

Cone Handle

1-7/8"

4-5/8"

9-3/4"

$24.95

Quantity:
 

 

C-4403

Nemco

25

143

Cone Handle

1-3/8"

4-5/8"

11-5/8"

$24.95

Quantity:
 

 

C-4405

Rainbow, Waterway

50

158

2-1/8"

2-1/8"

4-15/16"

6-5/8"

$35.95

Quantity:
 

 

C-4428

Santanna

25

148

2-1/8"

2-1/8"

4-15/16"

9-13/16"

$25.95

Quantity:
 

 

C-4429

Nemco

30

158

2-1/8"

2-1/8"

4-15/16"

10-3/8"

$32.95

Quantity:
 

 

C-4430

Santanna

30

145

2-1/8"

2-1/8"

4-15/16"

11-7/8"

$25.95

Quantity:
 

 

C-4431

Lifestyle, Skim Filter

30

158

Closed

2-1/8"

4-15/16"

10-3/8"

$29.95

Quantity:
 

 

C-4440

Sundance Spas

40

158

Castle

2-1/16"

4-5/8"

16-3/4"

$33.95

Quantity:
 

 

C-4449

Santanna

45

143

2-1/8"

2-1/8"

4-15/16"

17-3/4"

$30.95

Quantity:
 

 

C-4600

Muskin A2300

8

55

Closed

2-3/16"

4-15/16"

8"

$8.95

Quantity:
 

 

C-4601

Lomart 60-4316

16

69

1-1/8"

2-3/8"

4-3/4"

18"

$14.95

Quantity:
 

 

C-4602

Muskin

N/A

55

2-3/16"

2-3/16"

4-15/16"

8"

$8.95

Quantity:
 

 

C-4603

Haugh's (9)

9

65

1-15/16"

1-15/16"

4-1/4"

10-7/8"

$14.95

Quantity:
 

 

C-4604

Haugh's, Jacuzzi Leis.

15

65

1-15/16"

1-15/16"

4-1/4"

17-7/8"

$13.95

Quantity:
 

 

C-4605

Muskin, Sears (10)

8

55

2-3/16"

2-3/16"

4-15/16"

8"

$8.95

Quantity:
 

 

C-4606

Coleco

N/A

51

1-15/16"

1-15/16"

4-1/4"

8"

NLA

Quantity:
 

 

C-4607

Coleco (11)

N/A

51

1-15/16"

1-15/16"

4-1/4"

8"

$10.95

Quantity:
 

 

C-4608

Coleco (12)

N/A

51

1-1/8"

2-3/8"

4-3/4"

8"

$10.95

Quantity:
 

 

C-4609

Coleco F-110, CR-8

N/A

51

1-1/8"

2-3/8"

4-3/4"

8"

$8.95

Quantity:
 

 

C-4610

Sta-Rite TX-15

N/A

80

1-1/16"

1-1/16"

4-1/2"

9-3/4"

$25.95

Quantity:
 

 

C-4611

Coleco (13)

N/A

57

1-1/8"

2-3/8"

4-3/4"

11"

$10.95

Quantity:
 

 

C-4616

Coleco (14)

N/A

57

1-1/8"

2-3/8"

4-3/4"

16"

$15.95

Quantity:
 

 

C-4618

Coleco (15)

N/A

57

1-1/8"

2-3/8"

4-3/4"

18"

$14.95

Quantity:
 

 

C-4620

American CMDR (16)

20

111

2-1/16"

2-1/16"

4-5/8"

11-7/8"

$19.95

Quantity:
 

 

C-4625

Rainbow (17)

25

106

2-1/8"

2-1/8"

4-15/16"

13-15/16"

$24.95

Quantity:
 

 

C-4637

Rainbow (18)

37

158

2-1/8"

2-1/8"

4-15/16"

13-15/16"

$29.95

Quantity:
 

 

C-4950

Rainbow (19)

50

212

2-1/8"

2-1/8"

4-15/16"

13-15/16"

$30.95

Quantity:
 

 

C-4970

Waterways Plastics

75

178

2-1/8"

2-1/8"

4-15/16"

23-5/8"

$40.95

Quantity:
 

 

C-4975

Rainbow (20)

75

210

2-1/8"

2-1/8"

4-15/16"

20-1/8"

$34.95

Quantity:
 

 

C-4995

Waterways (21)

95

222

2-1/8"

2-1/8"

4-15/16"

23-5/8"

$46.95

Quantity:
 

 

C-4999

Rainbow RTL-100

100

210

2-1/8"

2-1/8"

4-15/16"

26-11/16"

$50.95

Quantity:
 

 

NOTES:

(1) C-4302 this cartridge is used on Pleatco skim filter, Softsider Spas and Comfort Line Spas.

(2) C-4303 this cartridge is used on Pleatco skim filter, Softsider Spas and Vita Spas.

(3) C-4304 this cartridge is used on SLM, Buddy-L, Waterworks, Empire, Pelican Recreational,, Haughes D-8 skim filter and H2O Recreation.

(4) C-4305 this cartridge is used on Cal Spas, Martec, Sonfarrel and Advantage Manufacturing.

(5) C-4324 this cartridge is used on Pleatco skim filter, Spa Manufactures and Gatsby Spas.

(6) C-4326 this cartridge is used on Rainbow Products, Waterway Plastics and Custom Molded Products

(7) C-4332 this cartridge is used on Martec, Sonfarrel and Advantage Manufacturing.

(8) C-4335 this cartridge is used on Rainbow Products, Waterway Plastics and Custom Molded Products.

(9) C-4603 this cartridge is used on Haugh's and Jacuzzi Leisure C-11.

(10) C-4605 this cartridge is used on Muskin FP A2027, Sears and Haugh Products.

(11) C-4607 this cartridge is used on Coleco F-120/DR-7, Krystal Klear models 108R/12, Intex Sand-n-Sun, Wet Set, Easy Set size "A" or "C" and Aqua Leisure size "2".

(12) C-4608 this cartridge is used on Coleco models F-110 & CR-8 and Cyclone Pool Vac.

(13) C-4611 this cartridge is used on Coleco F-112 & F-350 & CR-11 & DR-11.

(14) C-4616 this cartridge is used on Coleco F-750 & F-775 & F-850 & DR-16

(15) C-4618 this cartridge is used on Coleco F-225 & F-235 & F345 & DR-18 and Lowmart 60-4314

(16) C-4620 this cartridge is used on American Products (now Pentair) Commander II (in line)

(17) C-4625 this cartridge is used on Rainbow, Waterway Plastics and Custom Molded Products.

(18) C-4637 this cartridge is used on Rainbow, Waterway Plastics, Morgan Spas, Leisure Bay Spas and Custom Molded Products.

(19) C-4950 this cartridge is used on Rainbow, Waterway Plastics and Custom Molded Products.

(20) C-4975 this cartridge is used on Rainbow RTL-75, and Custom Molded Products.

(21) C-4995 this cartridge is used on Waterways Plastics and Cal Spas.

Cartridge Filter Cleaning Instructions (Chlorine Users)

You should clean the filter element when the pressure increases 8 PSI (pounds per square inch) above the clean pressure. If you are using Baquacil®, Soft Swim® or some type of biquanide system you should first clean the element with a chemical specifically designed for this sanitizing system (see adjacent block for cleaning process). Spa filters require more frequent chemical cleanings than pools elements.

1. Remove the cartridge from the filter housing following the manufacture's instructions.

2. Use a garden hose with a straight flow nozzle to wash down the filter element. Work from the top down, holding the nozzle at a 45 degree angle, and wash all the pleats with emphasis between pleats.

3. Rinse until all dirt and debris are gone. At this point if the element does not need to be chemically cleaned you can return the element back to the filter housing. However, filter elements tend to work better if they go in the filter housing dry so it is a good idea to have 2 filters one would be in use while the other is being cleaned and dried.

4. If you are chemically cleaning the filter, follow the directions on the filter cleaner manufacture's bottle or web site for how to apply the solution.

5. Rise the cartridge again to insure the chemical cleaning solution has been removed.

6 If the filter has a coating of algae, calcium carbonate (scale), iron (looks brown), or other minerals, soak the cartridge in a solution of one part acid to twenty parts of water until all bubbling stops. WARNING: Failure to remove all oils and cleaning solutions before acid soaking will result in a permanent restriction of water flow and cause premature cartridge failure.

7. Rinse the cartridge clean and let dry (see note in step 3).

Note: DPW does not recommend the use of diatomaceous earth (DE) with cartridge filters. DE particles will become trapped in the body of the media and shorten the cartridge's life.  If desired, a cellulose fiber (Zeofiber) can be used in moderation.

 

Cartridge Cleaning Supplement for Biguanide Users

Unlike chlorine which oxidizes the bacteria in the water, the active ingredient in biquanide systems, polyhexamethylene biqunaide (PHMB), destroys the bacterial cells. PHMB locates and binds the bacterial surfaces, then attacks the outer bacterial wall. Once this wall has been compromised, the inner cell membrane (the cytoplasmic membrane) is destroyed. This destruction allows the cell contents to disperse into their surrounds where they are further broken down into their elemental parts by non-chlorine oxidizer such as Baqua Shock® or Soft Swim C®.  A simpler explanation; If you had a log in a fire place and you set fire to it when it was done burning you would have very little of the original log left over. This is the equalivent of using chlorine in the pool. However if you used a saw you would have all of the log left over in a huge pile of saw dust. This is what a biquanide system does. So there is far more mess to clean up clogging the filter faster.

In addition, Baqua Shock® and Soft Swim C® are mild coagulatns which combine bacterial cells and other small particles in the environment into particles large enough to be trapped by the filter. The resulting deposit is gray sticky film on the media which can only be removed by using Baqua Clean® or Soft Swim Filter Cleaner®. If trisodium phosphate (TSP) or any TSP type cleaner is used prior to stripping the film, the substance cannot be removed from the media and the filter cartridge must be replaced.

WARNING: Follow all manufacture's instructions, warnings and cautions when using Baquacil® or Soft Swim® products.

     

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