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DuPlex 4.5" OD Big Blue Water Filter Housing | 20"

DuPlex 4.5" OD Big Blue Water Filter Housing | 20"


Kit Type (See Below Table for Contents) : Bare Housing Kit

DuPlex 4.5" OD Big Blue Water Filter Housing | 20"


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Waterite DuPlex Big Blue 4.5" Diameter Water Filter Housing Kits accept 20" long Big Blue 4.5" diameter filters. These double filter kits can be used to filter sediment and odors out of the water supply for smaller systems including homes, campgrounds and process treatment. Note: photo shows 10" Duplex Filter Kit.

These twin filter housing kits are highly adaptable to the user's individual needs. Any combination of filter types is possible, depending on the source of the water and the required filtered water objectives.

We list several common whole house duplex filter arrangements for sale. For many customers these arrangements will work well, but please keep in mind that you may require a different filter arrangement depending on the quality of your water and your own personal needs.


  • These duplex filter housings accept all Big Blue 4.5" diameter 20" long water filter cartridges, including melt blown polypropylene, pleated polyester, pleated cellulose and string wound sediment cartridges, as well as carbon block filters for taste and odor removal

  • These twin water filter housings accept any brand of 20" long 4.5" OD Big Blue water filters including Waterite, Harmsco, GE Osmonics, Flomatic, Pentair, Clack and Watts.

  • Easy do it yourself installation

  • Minimal pressure drop

Each Kit includes the following:

  • Two Big Blue 4.5" diameter x 20" long filter housings

  • Powder coated steel bracket

  • Twin pressure gauges

  • Set of O-Rings

  • 1" NPT female threaded inlet and outlet plumbing connections

  • Comes with twin pressure relief valves

 Kit Name
Kit Contents
Bare Filter Housing Kit 20" Duplex Filter Housing
Melt Blown Filter Housing Kit 20" Duplex Filter Housing PLUS 5 and 1 Micron Melt Blown Filters
Pleated Filter Housing Kit (Washable & Reusable Filters)
20" Duplex Filter Housing PLUS 5 Micron Pleated Filter and 1 Micron Absolute Pleated Filter
Sediment & Taste/Odor Filter Housing Kit 20" Duplex Filter Housing PLUS 1 Micron Absolute Pleated Filter and 5 Micron Carbon Block Filter

Free Courier Delivery Over $199 in Canada/USA

Cleanflow ships all across Canada and the continental USA. Emails with tracking details are automatically sent the moment your order leaves our warehouse. Any order with a total of $199.00 or more before taxes qualifies for Free Courier Shipping with Canada Post, Canpar, Fed Ex, Purolator, UPS or Loomis. Courier shipments to "Beyond Service Area" destinations will be requested to pay for this additional service. Larger or heavier packages will ship via LTL truck at additional cost. Orders under $199.00 before taxes will be charged a flat rate of $20.00 + applicable taxes. Cleanflow is a 100% Canadian family owned and operated company.

Delivery Times Inside Canada

Prairie Provinces: 1-3 Business Days
Northern Ontario: 1-3 Business Days
Southern Ontario: 1-3 Business Days
Quebec: 1-3 Business Days
Atlantic Canada: 2-5 Business Days
British Columbia: 2-5 Business Days
Yukon & Nunavut: 5-10+ Business Days
Northwest Territories: 5-10+ Business Days

Please note: Business Days are Monday to Friday. All delivery
times are estimates only. These estimates do not include the processing
time to prepare the order for shipment.



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