DL706 Sanistream by Darlly In-Line Sanitation Replacement Hot Tub Spa Filter Cartridge. The Darlly DL706 (Darlly: 40506, Pleatco: PRB501N, Fibur: FC-2390 & Unicel: C-4950) replacement Hot Tub Filter Cartridge is designed to replace number of hot tub models as listed below.


Darlly Europe’s revolutionary SaniStream Direct Line Filtration system is a new and unique technology which combines the world’s finest hot tub filters with a safe, convenient, and effective sanitiser dispenser to give an integrated spa water treatment system.


In accordance with Health and Safety Guidelines (HSG282), a domestic hot tub used in rented accommodation including holiday lets, homes, parks, lodges, chalets, cottages, caravans, etc should be disinfected using Bromine or Chlorine through the use of an inline continuous disinfection feeder.


This filter has a central divider for the SaniStream dosing dispenser to be inserted and kept in position. The design allows easy access for inspection, refill or replacement while keeping it locked away out of sight of consumers using the spas.


Why SaniStream by Darlly 

  • Easy to install
  • Easy to use
  • Cost effective
  • Keeps chemicals away from bathers
  • Uses regular small chlorine or bromine tablets
  • Does not require removal while bathers are using hot tub
  • Does not require expensive modification to the hot tub
  • Does not require the purchase of additional expensive chemical dosing equipment
  • Does not require the purchase of expensive proprietary chemical cartridge
  • Allows compliance with Sec. 76 HSG282 (Health and Safety Guidelines) for hot tubs installed in holiday lets



  • Top: 5cm hole
  • Bottom: 5cm hole
  • Darlly: 40506
  • Length: 34cm
  • Diameter: 13cm
  • Sq Ft: 50



  • Pleatco: PWW50PS
  • Unicel: 6CH-940
  • Darlly: 60401
  • Fibur: FC-2811


Ideal filter replacement cartridge for the following hot tub brands

This filter is known to fit some / all spa models from the following manufacturers. Always compare the dimensions of your filter against the dimensions listed.


Caldera Spas, Canadian Spas, Coast Spas, Coleman Spas, Coyote Spas, Crest Europe, Crystal Water Spa, D M Industries Spas, dakota Spas, Danz spa, Diamante Spas, Dynasty Spas, Elite Spas, Emerald Spas, Great Lakes Spas, Hydro Spa, Hydropool, JACUZZI®, Leisure Bay Spas, Maax Spas, Mistral Hot Tubs, Nordic Spas, Pacific Spa, QCA Spas, Rota Spas, Sierra Spas, Signature Spas, Southwest Spas, Spa Crest, Strong Spas, Sun Ray Spas, Sunbelt Spas, SUNDANCE® SPAS, Sunrise Spas, Superior Spas, Tiger River Spas, US Spas, Villeroy & Boch Spa, Vision Hot Tubs and Vita Spas.


Please Note: The SaniStream dispenser is not included with the filter and must be purchased separately.


We would recommend using: AquaSPArkle Stabilising Mini 20g Chlorine Tablets or AquaSPArkle Bromine Tablets with this SaniStream by Darlly compatible filter.


Additional Info
Please note: Although the Sanistream dispenser is designed to be used with either Chlorine or Bromine tablets, you may find Chlorine tablets to dissolve at a much quicker rate. To try to avoid this happening ensure your filtration cycle is reduced to no more than 4 hours per 24 hours.


Also, some further information to bear in mind is Chlorine is acidic and lowers the pH value of the water. When the pH value of the water gets low it has a multiplying effect on the acidity and can have a melting effect on the Polyurethane plastic in the top and base of the filter. Therefore, it is important you balance all your chemicals correctly and test levels regularly.

DL706 SaniStream by Darlly Filter

SKU: DL706 0700175993403
£39.99 Regular Price
£35.99Sale Price