How to get a Feature with a srsName?

Question

This is a duplicate asked on AutoDesk Forum.

If I form a request like this:

http://usalvwdgis1/mapserver2013/mapagent/mapagent.fcgi?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.1.0&MAXFEATURES=2&FID=47403&TYPENAME=Water:WA_LARGE_VALVE

I get a valid response:

<gml:featureMember>
  <Water:WA_LARGE_VALVE>
    <Water:FID>78935</Water:FID>
    <Water:Geometry>
      <gml:Point>
        <gml:pos>498289.041000 5459452.306000</gml:pos>
      </gml:Point>
    </Water:Geometry>
  </Water:WA_LARGE_VALVE>
</gml:featureMember>

But if I add a srsName to the request I get the exact same response:

http://usalvwdgis1/mapserver2013/mapagent/mapagent.fcgi?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.1.0&MAXFEATURES=2&TYPENAME=Water:WA_LARGE_VALVE&srsName=EPSG:26910     
http://usalvwdgis1/mapserver2013/mapagent/mapagent.fcgi?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.1.0&MAXFEATURES=2&TYPENAME=Water:WA_LARGE_VALVE&SRSNAME=EPSG:4326

But I expect to see the results in the requests coordinate system. Is my request incorrectly formed (maybe add 'urn:x-ogc:def:crs' before the code)?