Features:

• Model No. 20357
• Provides complete protection against positive and negative pressures in the system
• Replaces extensive vent piping saving material and installation costs
• Provides greater freedom of design for engineers, architects and design professionals
• Eliminates leak prone roof penetrations. No roof penetrations are required no matter how tall the building
• Reduces the need for fire stopping devices preventing the chimney effect in the pipes, reducing the risk of fire spreading upwards between floors
• Can be retrofitted into an existing drainage system to solve positive pressure problems
• Prevents propagation of oderous sewer gases
• Requires no maintenance, as all Studor products are non-mechanical devices
• 10 year warranty for replacement of defective devices
• Easy to install, does not require high skilled labor or special training