Standard housings offer the following:

• Securely retained Buna "N" O-Ring to ensure effective sealing by positive tangential contact; eliminates accidental misplacement; provides longer life.
• Positive head to bowl "stop" to prevent bowl overtightening.
• Mounting bosses in head for available bracket.
• Full testing to industry standards of the Water Quality Association for burst pressure, water tightness and fatigue resistance.
• tested and certified by NSF International under ANSI/NSF Standard 42 for material and structural integrity requirements