The valves you show I am suspecting are your low point drains. Under the camper you will see the ends of those 2 pipes where the water can run out on the ground.
Odds are high you might not be able to find those type of valves. However if the OD of the tubing is 1/2", then the newer style may work on your older tubing. Cut out the old valve and install a new one.
Flairit makes the type that are in my camper. Sunline does not make these, they just buy them from Pex piping supply houses. A RV dealer may have them or see Amazon
See here for 1/2" Flairit at the factory site
FLAIR-IT by THC
And here on Amazon to buy them as one of many places
http://www.amazon.com/s/?ie=UTF8&key...l_806zbhd0gq_b
Hope this helps
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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