• 12 PSI for 50 hours, no leakage

Major Pipe Manufacturer. 1992

• 16.5 PSIG for 10 minutes, no leakage
• 22" Hg for 10 minutes, no leakage
• Back to room pressure
• 22" Hg for 10 minutes, no leakage
• Pipe Deflection 5%
• Pressure at 10.8 PSIG for 10 minutes, no leakage

Reference Document: ASTM 3212. Northwest Testing Labs, Portland, OR 1991

• *"...FOWLER INSERTA TEE APPROVED."

State of OR, Plumbing Advisory Board 1982