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Sentinel Drain Guard Sewer Backflow Preventer 3" and 4" Backwater Valve - Holmes ApprovedMerchant Video
  • Sentinel Drain Guard Sewer Backflow Preventer for 3" and 4" Drains (Backwater Valve) - CSA Approved
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Sentinel Drain Guard Sewer Backflow Preventer for 3" and 4" Drains (Backwater Valve) - CSA Approved

4.3 out of 5 stars (399)
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About this item

  • CSA APPROVED - Sentinel is the only consumer Backwater Valve on the market that is CSA APPROVED PRODUCT
  • PLEASE MEASURE BEFORE BUYING - Fits 3" (75mm) Floor Drain and 4" (100 mm) Floor Drain with Included Adapter
  • Sits in an Open Position so Normal Drainage can occur. Device will close in the event of a backflow occurrence
  • Unlike most Backflow Preventers, Sentinel comes complete with a fitted drain cover
  • Easy Installation in a manner of minutes and requires zero maintenance.
  • Housing made of ABS plastic with gaskets and o-rings of silicone

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This item: Sentinel Drain Guard Sewer Backflow Preventer for 3" and 4" Drains (Backwater Valve) - CSA Approved
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Product description

The Sentinel Drain Guard is a sewage backflow protection valve. Highly affordable and easy to install on any floor drain in just one step, the Device is a must-have for every urban homeowner with a basement. Equipped with several redundant features to prevent failure, it’s a device that fits 3” and 4” floor drains and is able to withstand 65lbs of pressure. Without any need for regular maintenance, the Sentinel is reliable and long lasting.

Product information

Technical Details

Manufacturer ‎Sentinel
Place of Business ‎Scarborough, ON M1R 4Z5, CA
Part Number ‎DG100
Product Dimensions ‎10.16 x 10.44 x 10.41 cm; 408.23 g
Item model number ‎DG100
Is discontinued by manufacturer ‎No
Size ‎Units
Colour ‎Black
Style ‎Modern
Finish ‎Silicone
Material ‎Acrylonitrile Butadiene Styrene (ABS)
Power Source ‎Battery powered
Item Package Quantity ‎1
Certification ‎CSA
Special Features ‎Long Lasting
Included Components ‎3" device, 4" adapter, instructions
Batteries Included? ‎No
Batteries Required? ‎No
Warranty Description ‎Limited Lifetime
Item Weight ‎408 g
Country of origin ‎China

Additional Information

ASIN B07R7TFXSQ
Customer Reviews
4.3 out of 5 stars (399)

4.3 out of 5 stars
鶹 Rank
Date First Available April 30 2019

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Sentinel Drain Guard Sewer Backflow Preventer for 3" and 4" Drains (Backwater Valve) - CSA Approved

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