Hi all.
How do these pressure/temperature relief valves work ? See nothing in the web but how to replace - they are supposed not to be repaired- What is inside and how to dismantle ?
Mine (3) have the sensing white bottom element rod wobbly, not firm, can they be used? Are they supposed to be firm or wobbly ? Anyone knows ?

 

What happened to the "How does it work ? ---thread"?

 

Felt like the 'How does it work' should be respected/reserved for electronics; not wandering off-topics.

 

DO NOT mess with a T/P-Valve ( Temperature-Pressure-Valve ).
Doing so could be extremely dangerous.
Buy a new one, they are dirt-cheap and available everywhere Plumbing-Supplies are sold.
.
.
.

 

EDIT; deleted message to avoid hijacking thread.

 

I would not replace it until shows nearly spent; meaning it is doing its work.

 

Felt like the 'How does it work' should be respected/reserved for electronics; not wandering off-topics.

'How does it work' is a off-topic thread instead of electronics but whatever. It would be nice (as you said) to consolidate these sort of general questions and I thought that was the reason for the original thread.

https://patents.google.com/patent/US5967410A/en

https://en.wikipedia.org/wiki/Wax_motor

 

Hi all.
How do these pressure/temperature relief valves work ? See nothing in the web but how to replace - they are supposed not to be repaired- What is inside and how to dismantle ?
Mine (3) have the sensing white bottom element rod wobbly, not firm, can they be used? Are they supposed to be firm or wobbly ? Anyone knows ?
View attachment 339038

It is supposed to be wobbly. I replaced one recently. It was an easy job, and my plumbing skills are, at best, sketchy.