I have been in heated arguments over the use of flex tube used for water distribution lines, being used on a water heaters TPR valve as a discharge line. I know that they do not meet the requirements for this application. What are your thoughts and where can i find any literature on this…
I can’t give an answer on “flex tube” as that isn’t a type of supply pipe that I am aware of. There are “flexible” pipes that are approved for TPR discharge applications though such as PEX.
Sorry guys let me be more specific on the type of supply line hose. I have come across braided flexible hoses used as a discharge line… Acceptable or not???
If you’re in a heated argument because somebody said they’re acceptable … Just have them provide you a building code or manufacturers installation specification saying its ok INSTEAD of you trying to show them WHY its NOT ok.
I’ve done this for 35 years in cases like this … NEVER failed yet
I’ve been beat by a garden hose under 80 pounds of pressure.
Now imagine being thrashed by a metal braided hose with 210 pounds of pressure
cwallace1
(Charles Wallace, OK License # 70001308)
17
What are temperature limitations for PEX?
PEX tubing can be used up to 200° Fahrenheit for heating applications. For plumbing, PEX is limited to 180° F at 100 psi. Temperature limitations are always noted on the print line of the PEX tubing. PEX systems are tested to and can be used with standard T and P relief valves that operate at 210” F and 150 psi.