You've heard the term "it's a better mousetrap" and the GT Water Products Safe-T-Seal test plug is just that. Test plugs can be dangerous devices, so much so that many have warning tags and extensive instructions that mention "death and bodily injury" if used wrong.
The Safe-T-Seal series solves this problem. A test ball is inflated with air and if over-inflated can explode and can cause "death and bodily injury"... not good. Safe-T-Seal uses a patented pressure release safety valve to expel air from the plug once the optimum pressure is reached, the plug is designed to never over-inflate and explode. Less risk, liability and a longer lasting product due to human error.
If that isn't enough to consider it a better mouse trap how about the more durable waffle body design, the ability to connect a garden hose to it and fill with water if air isn't available, and it covers multiple sizes (the TP34 is 3-4"). Available in sizes that range from 1-1/4" to 24." Learn more >>>