Technical High pressure valve stems

[blaven]

What importance (if any) should we attach to insisting on valve stems being high pressure models during tyre replacement?
How clued up are tyre fitters in this respect?
They are available with the exposed brass stem on ebay and Amazon, but in bags with far more than I need.
Most Ducato owners run pressures of 60-70psi.
Having found alarming deterioration in the rubber stems of my valves, I had them replaced mercifully before any blowouts.
Most campervans would do a fairly small annual mileage, so tyre replacement crops up every 4-6 years, say. Obviously then, the valves are the same age.

 

[CDK]

It is extremely important to use metal valve stems to avoid UV deterioration of the rubber. There are also rubber valves with a metal sleeve around them.
Ducatos often have metal valves on the front wheels only, probably because a blowout there is more dangerous than at the rear and for Fiat every cent counts.

 

[corcai]

Cheap as chips 100psi rated

http://www.ebay.co.uk/itm/4-High-Pr...665716?hash=item2efe671b74:g:VDsAAOSwL7VWjk2B

I only run 55psi as I have a lightweight conversion at about 2.5tons fully loaded but I fitted the ones above after I had a valve stem fail, talked to about 7 different tyre shops before ordering online they had never heard of them.