I did a XL at Lake Cumberland a couple weeks back. The coustomer had ordered some norgrens in advance and got them from the manufacturer. I always get them from prevo. When compared to the valve prevo sends it prompted me to do some investigation.
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OK disregard the fact that one is old and 1 is new.
See how the body of the valve on the top is plowed out and the bottom one a solid block of aluminum.
They do the exact same thing.
However.
They do carry different part numbers and this is what I learned and is another topic I've never seen discussed anywhere.
The bottom one is a "special" as defined by norgren tech support and is the exact valve prevo specs. It came from prevo. The top is a stock item. It came from norgren.
So when u r getting service done at shops other than prevo be sure u r not getting a valve that's marked up from prevo price and then a non spec valve is installed that was aquired from the manufacture at a significant savings in cost to the installer.
My suggestion, although the tech couldn't expound beyond special and without having prints to look at specifics for me, we both agreed it was defiantly a more robust valve body just by looking at it.
I'd stick with getting them at Prevo and being sure u got the right stuff. How is one to know how the other valve preforms in conditions like extreme cold, ect.
In this case the added cost of prevost parts is justified.
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