The Test-Tite® brand has over 40 years experience in manufacturing a complete line of pneumatic and mechanical test plugs. Our full line of pneumatic test plugs include standard, multi-size, cleanout, long and bypass pneumatic plugs for use in residential, commercial and underground markets. Pneumatic plugs, up to 15″ diameter, come standard with a Pressure Relief Valve – the first full line of Pressure Relief Plugs in the Plumbing industry. Our pneumatic plugs come standard with a heavy wall thickness which allows us to offer a 3 year warranty. Our full line of mechanical test plugs include Twist-Tite wing nut test plugs, T-Cone Cleanout and Repair Plugs, Twist ‘N Seal,® Double Mechanical, Flush Cleanout Repair Plugs, and the all new Mechanical Cleanout Test Plug.