My solenoid valves arrived in the mail today.
Like I said before, these parker valves are creme de la creme as long as you get one spec'd proper for the job.
The only way this valve could be better is if it had the 1/2" npt sleeve where the wires exit for use with a wire grommet but this should still be much easier to work with then the spade connectors. Definitely safer since there won't be any exposed live-wires. The stainless pressure vessel is the same size as the sherrodSurplus parker valve but the coil is about 50% taller.
100% stainless everything. Internal machine work is impeccable. Clean welded joints, and standard O-rings. Use of standard o-rings are nice because replacements are easy to find, vs. proprietary seals that may not even be available if the manufacturer discontinues the design.
On this particular Parker valve they even used o-rings on the coil body. It's a nice touch to help keep moisture out of there, considering anything used around an aquarium tends to get splashed once in a while.