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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 CH Series Filters

3-3-12

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

4CH-19

Top Load

13

199

Molded Cone

1-1/2" MT

4-5/8"

4-5/8"

$19.95

Quantity:
 

 

4CH-20

Top Load

20

204

Molded Cone

1-1/2"

4-5/8"

6-3/4"

$22.95

Quantity:
 

 

4CH-21

Top Load

19

158

Molded Cone

1-1/2"

4-5/8"

8"

$24.95

Quantity:
 

 

4CH-22

Freeflow Spas TLX/RLX

25

212

2-1/8"

2-1/8"

4-15/16"

6-5/8""

$22.95

Quantity:
 

 

4CH-23

Freeflow Spas CLX

25

212

Closed

1-1/" MT

4-15/16"

6-5/8"

$22.95

Quantity:
 

 

4CH-24

Top Load

25

173

Molded Cone

1-1/2"

4-5/8"

9-3/4""

$24.95

Quantity:
 

 

4CH-30

Top Load

30

158

Molded Cone

1-1/2"

4-5/8"

11-7/8"

$25.95

Quantity:
 

 

4CH-35

Top Load

35

145

Molded Cone

1-1/2"

4-5/8"

16"

$29.95

Quantity:
 

 

4CH-50

Top Load

50

225

Molded Cone

1-1/2"

4-5/8"

14-3/4"

$29.95

Quantity:
 

 

4CH-65

Top Load

65

217

Molded Cone

1-1/2"

4-5/8"

19-5/8"

$37.95

Quantity:
 

 

4CH-920

Saratoga Spas

20

204

Molded Cone

1-1/4"

4-5/8"

6-3/4"

$24.95

Quantity:
 

 

4CH-925

Top Load

20

190

Semi-Circle

1-1/2"

4-5/8"

7-1/4"

$25.95

Quantity:
 

 

4CH-940

Dimension One Spas

40

176

Semi-Circle

1-1/4"

4-5/8"

15"

$29.95

Quantity:
 

 

4CH-949

Waterways/Dynasty Spas

50

210

V-Grove SC

2"

4-15/16"

13-1/2"

$33.95

Quantity:
 

 

4CH-950

Dimension One Spas

25

139

Semi-Circle

1-1/4"

4-5/8"

12"

$25.95

Quantity:
 

 

5CH-35

Spas by Maax

35

203

Semi-Circle

1-1/2"

4-5/8"

8"

$30.95

Quantity:
 

 

5CH-45

Hayward CX-200-RE

45

225

2-1/8"

1-1/2"

5-5/16"

10"

$33.95

Quantity:
 

 

5CH-203

LA Spas sock filter sub

20

235

Closed

3"

5-3/8"

7"

$28.95

Quantity:
 

 

5CH-352

Marquis Spas New Style

35

151

Bar Handle

2"

5-3/16"

12-1/2"

$28.95

Quantity:
 

 

5CH-402

Del Sol Spas

40

204

Bar Handle

2"

5-13/16"

10-3/4"

$29.95

Quantity:
 

 

5CH-502

Marquis Spas New Style

50

197

Bar Handle

2"

5-3/16"

12-1/2"

$30.95

Quantity:
 

 

5CH-752

Cal Spas

75

194

Bar Handle

2"

5-13/16"

16-1/8"

$43.95

Quantity:
 

 

6CH-25

Top Load

25

205

Semi-Circle

1-1/2"

6"

5-1/2"

$24.95

Quantity:
 

 

6CH-26

Top Load

25

158

Semi-Circle

1-1/2"

6"

7"

$26.95

Quantity:
 

 

6CH-35

Top Load

35

156

Semi-Circle

1-1/2"

6"

9-7/8"

$29.95

Quantity:
 

 

6CH-352

Waterway Plastics

35

188

Semi-Circle

2"

6"

8"

$31.95

Quantity:
 

 

6CH-45

Top Load

45

158

Semi-Circle

1-1/2"

6"

12-3/8"

$33.95

Quantity:
 

 

6CH-47

Top Load

47

225

Semi-Circle

1-1/2"

6"

9-1/8"

$29.95

Quantity:
 

 

6CH-49

Top Load

50

188

Semi-Circle

2"

6"

8"

$34.95

Quantity:
 

 

6CH-50

Top Load

50

158

Semi-Circle

1-1/2"

6"

13-7/16"

$35.95

Quantity:
 

 

6CH-502

Artesian Spas

50

209

Semi-Circle

2"

6-3/4"

8"

$37.95

Quantity:
 

 

6CH-60

Top Load

60

158

Semi-Circle

1-1/2"

6"

16-1/4"

$41.95

Quantity:
 

 

6CH-75

Top Load

75

158

Semi-Circle

1-1/2"

6"

19-3/4"

$47.95

Quantity:
 

 

6CH-924

Top Load

25

205

Semi-Circle

1-1/2"

6"

5-1/2"

$28.95

Quantity:
 

 

6CH-925

Top Load

25

132

Semi-Circle

1-1/2"

6"

8-1/4"

$31.95

Quantity:
 

 

6CH-940

Top Load

45

225

Semi-Circle

1-1/2"

6"

8-1/4"

$29.95

Quantity:
 

 

6CH-941

 Waterway/ CMP

45

225

Semi-Circle

1-3/4"

6"

8-1/4"

$30.95

Quantity:
 

 

6CH-942

 Waterway/ CMP

45

225

1-3/4"

1-1/2"

6"

8-1/4"

$30.95

Quantity:
 

 

6CH-960

Jacuzzi Premium

52

113

Semi-Circle

2"

6-3/4"

15-1/2"

$35.95

Quantity:
 

 

6CH-961

Jacuzzi Premium

60

131

Open w/Slots

2"

6-3/4"

15-1/2"

$39.95

Quantity:
 

 

7CH-32

Top Load

32

175

Semi-Circle

1-1/2"

7"

8"

$28.95

Quantity:
 

 

7CH-322

Coleman Spas

32

175

Semi-Circle

2"

7"

8"

$28.95

Quantity:
 

 

7CH-40

Coleman Spas

40

178

Semi-Circle

1-1/2"

7"

9-3/4"

$32.95

Quantity:
 

 

7CH-402

Coleman Spas

40

191

IM Knob Handle

1-1/2"

7"

9-1/8"

$32.95

Quantity:
 

 

7CH-50

Coleman Spas

50

144

Semi-Circle

1-1/2"

7"

14-3/4"

$35.95

Quantity:
 

 

7CH-502

Coleman Spas

50

144

Semi-Circle

2"

7"

14-3/4"

$35.95

Quantity:
 

 

7CH-552

Dimension One Spas

52

216

Semi-Circle

2" MT

7"

10-1/2""

$37.95

Quantity:
 

 

7CH-752

Dimenson One Spas

75

216

Semi-Circle

2"

7"

14-3/4""

$44.95

Quantity:
 

 

7CH-90

Sundance Spas

90

182

2-1/2"

1-1/2"

7"

19"

$52.95

Quantity:
 

 

7CH-975

Dimension One Spas

52

216

Semi-Circle

1-1/2"

7"

10-1/2"

$44.95

Quantity:
 

 

8CH-102

Sundance Spas/Jacuzzi

95

259

Semi-Circle

2" MT

8"

15-1/2"

$65.95

Quantity:
 

 

8CH-202RA

Diamante Spas

85

224

IM Knob Handle

2"

8"

12-3/4"

$76.95

Quantity:
 

 

8CH-60

Continental Spas

60

177

Semi-Circle

2"

8"

11-5/8"

$61.95

Quantity:
 

 

8CH-66

Master Spas

 60

222

Semi-Circle

2"

8"

9-1/4"

$54.95

Quantity:
 

 

8CH-502

Vita Spas

50

258

V-Grove SC

2"

8-1/2"

7-1/4"

$41.95

Quantity:
 

 

8CH-852RA

Diamante Spas

85

224

IM Knob Handle

2" MT

8"

12-3/4"

$79.95

Quantity:
 

 

8CH-950

Bulfrog Spas

50

250

Semi-Circle

2"

8"

6"

$48.95

Quantity:
 

 

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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