The Backflow Solution
The most common available pipefitting is fitted with NPT, capable of
circumventing safety valves! NPT’s are no longer found on Reduced
Pressure Zone Valves (RPZ).
T&P Relief Valves were not the only safety devices required by code featuring
this simple circumvention.
Remember your introduction to Backflow Prevention?
What is this air gap fitting all about?
Backflow Preventers are Code required Safety Valves used to protect the
domestic water from pollution and contamination. Early on the Relief Valves
on RPZ’s began to leak and drip. Unknowing individuals began plugging the
relief valves (view 4th picture down). Much worse the NPT thread made it
easy for plumbers to connect the Relief Valves of the Backflow Prevention
Devices directly into the sewer (building drain).
Never plug the relief since this will render the RPZ nothing more than a low
hazard Double Check Valve. Never tie a domestic water line into a sewer
line. Direct cross connections are not allowed because people could get
sick, worse yet die.
During the 1970’s the Codes and Standard committee meetings were
blazing with the controversial situation of NPT’s on the water system Safety
Relief Valves of the RPZ Prevention Devices.
Money was not the issue, safety was! The industry was required to remove
the NPT’s. Pictured to the left are just samples of the old style NPT and the
new style – now required to have a special air gap fitting.
INDUSTRY CHANGE
Public Safety changed Codes for RPZ’s.
WHAT ABOUT WATER HEATER SAFETY?
THE CHOICE IS YOURS!
circumventing safety valves! NPT’s are no longer found on Reduced
Pressure Zone Valves (RPZ).
T&P Relief Valves were not the only safety devices required by code featuring
this simple circumvention.
Remember your introduction to Backflow Prevention?
What is this air gap fitting all about?
Backflow Preventers are Code required Safety Valves used to protect the
domestic water from pollution and contamination. Early on the Relief Valves
on RPZ’s began to leak and drip. Unknowing individuals began plugging the
relief valves (view 4th picture down). Much worse the NPT thread made it
easy for plumbers to connect the Relief Valves of the Backflow Prevention
Devices directly into the sewer (building drain).
Never plug the relief since this will render the RPZ nothing more than a low
hazard Double Check Valve. Never tie a domestic water line into a sewer
line. Direct cross connections are not allowed because people could get
sick, worse yet die.
During the 1970’s the Codes and Standard committee meetings were
blazing with the controversial situation of NPT’s on the water system Safety
Relief Valves of the RPZ Prevention Devices.
Money was not the issue, safety was! The industry was required to remove
the NPT’s. Pictured to the left are just samples of the old style NPT and the
new style – now required to have a special air gap fitting.
INDUSTRY CHANGE
Public Safety changed Codes for RPZ’s.
WHAT ABOUT WATER HEATER SAFETY?
THE CHOICE IS YOURS!
Click on images for a larger view
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