Under water pressure relief valve

[Trailrider]

Hello, I was hoping I could get opinions on how long a pressure relief valve would last submerged in a lake?
I am finally getting around to installing one on my submersible pump that is in a lake and I noticed the spring inside the relief valve looks like it is made of steel. From past experiences steel, even galvanized steel, only lasts a couple of years before it is corroded through.

My pressure relief valve housing is brass and I know will last, but the spring looks like it will rust out in no time.

Does the industry make a relief valve that is designed for this application?

Thanks in advance

 

[Craigpump]

the ones I use have stainless steel springs and will last a long time under water

 

[Sponsor]

 

[hj]

As far as I know, almost all springs are steel and will corrode, which is why the discharge lines MUST drain downhill from the valve.

 

[Smooky]

Pressure relief valve with stainless steel spring:
http://www.irrigationoutlet.com/Literature/Wilkins_P1500_PRV_Specs.pdf
http://www.legendvalve.com/products/LT_SP_WEB.pdf