The Thermo-Disc is the most simple and cost-effective way to prolong your septic system from freezing, by keeping the cold out and the heat in.
Even with insulated tank lids septics are still freezing due to the loss of heat through the walls of the riser.
This is why the Thermo-Disc is essentially helpful when it comes to the insulation of your septic, preventing it from freezing.
The Thermo-Disc is easily installed and removed while providing an air-tight seal. Preventing the cold from penetrating into the tank through the manhole riser and cover.