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Spa Filter -C4950 Unicel C-4950 Replacement 25 & 50 ft


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Item Description


C4950 Unicel C-4950 spa replacement filter 25 & 50 ft

Unicel-Rainbow inline 50 sq ft filter
Replacement filter for most hot tub!

Guardian Filtration Products



Spa Filter Replaces Unicel C-4950, Pleatco PRB50-IN, Filbur FC-2390 Filter Cartridge for Swimming Pool and Spa


Raibow is the world leader in Pool and Spa filtration systems! Keep you water sparkling clean with Rainbow's top of the line Unicel pool/hot tub filters. 50 sq ft total surface area means very little flow reduction. This cloth filter traps micro particals ensuring sparkling clean water.Unicel 50sqft Rainbow Inline Cartridge - Used on many manufactures from Cal Spa, Phoenix Spas, Waterway,Weslo, Image, Maxx, Artesian, Baja, Bullfrog Spasand many more!

NOTE: 50 sq.ft. C-4950 is an upgrade from the 25 Sq.ft. C-4326 abd C-4625 Cartridges and ensures better filtration and better water flow.


  • -Bottom Opening: 2 - 1/8"

  • -Top Opening: 2 - 1/8"

  • -Outside Diameter: 4 - 15/16" (Also replaces 5")

  • -Length: 13 - 5/16"

  • -REMAY Filter media

  • Meets or exceeds OEM quality!!

  • 50 sqft

  • UNICEL C-4950



  • This is a Guardian filter


Will work with other manufactures filters including: Cross Reference 100533, 17-175-1595, 172380, 201987300, 25391, 25393, 3301-2145, 6540-471, C4950, PENR172380, PRB50-IN, PRB50IN, R172380

Diameter = 4-15/16in.; Length=13-5/16in.; Top=2-1/8in.; Bottom=2-1/8in.


hot tub filter with Free Flow Design

With Advanced Free Flow Core for improved flow & better cleaning
NOTE: Filters should be replaced once every 6 months to ensure max flow through rate.


This unit is brand new and is for the 50 sq ft filter cartridge only. Filter housing caniter is sold seperately.


1ST  We are a world leading, manufacture of hot tubs and saunas and all the products we sell on Ebay are also used in our own products.  This means you can be rest asured we only sell the most reliable parts on the Market! 

2nd  Our on staff engineer means you get much more than just a qualitiy product when you buy from us.  Our engineer will help you before your purchase as well as during installation and will always be there for ongoing support afterwards, FREE OF CHARGE!  Call us or email us and you will quickly see our difference!


Payment Details

We accept PayPal and Credit card (Visa or Mastercard).  If you are ordering multiple units and part, please call us to see if we can save you shipping cost for multiple item orders.


 No taxes to US residence!

Shiping and Handling

Please allow 4-6 days for shipping via UPS Ground to USA or Canada.  You will be emailed a tracking number to the email address you provide us.  Expedited Shipping services are available!

Your #1 Hot Tub Parts Replacement store!


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  • Model: C-257
  • Shipping Weight: 1lbs
  • 29 Units in Stock
  • Manufactured by: Pentair