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.