The Lid™: Your First Line of Defense
A backwater valve basin is more than a plumbing access point—it is a direct connection to every sewer line beneath your home. Without a proper seal, this basin becomes a high-speed entry point for radon, VOCs, moisture, sewer gases, and cold air. The Lid™ is a Canadian-made, dual-seal system engineered to close these pathways at the source and restore air-barrier continuity where it matters most.
 
Why the Seal is Non-Negotiable
1. Stopping the "Stone Highway" Radon is the leading cause of lung cancer among non-smokers in Canada. Even if your basement envelope is airtight, the 3/4" crushed stone used to bed your pipes acts as a "highway" for soil gas. Radon travels easily along this porous gravel from the street and neighboring properties, bypassing your slab and entering your home through the unsealed basin.
 
2. Protecting Your "Paid-For" Air If you have an active radon mitigation system, an unsealed basin causes a "short circuit" in your home’s envelope. Instead of pulling gas from the soil, the system's fan vacuums heated or cooled air directly from your basement and vents it outside.

The Bottom Line
You are paying to heat your air, only to have it sucked out of the house. This drives up utility bills and reduces the system's ability to pull radon from the far corners of your foundation.
 
Built for Performance & Versatility
The Lid™ provides two-way protection: it keeps the poison out and the expensive, conditioned air in.
Dual-Seal Engineering: Designed for maximum protection while remaining fully removable for plumbing inspections and maintenance.
Active Mitigation Ready: Features a built-in knock-out port, allowing the basin to be retrofitted with an active mitigation system without compromising the seal.
Built for Canada: Engineered to withstand local conditions and align with modern building science and code requirements.
 
Note: The Lid™ is engineered specifically for backwater valve basins and is not intended for use with sump pumps. Seal the system. Protect the home. Save on energy.