Looking to use this. https://www.electricsolenoidvalves.com/1-4-3-way-12v-dc-electric-solenoid-valve/
For our vacuum system. I see solenoids listed in the pneumatic section. I’m not finding any info on vacuum. Anone know if this is legal per the rules for vacuum?
Possibly not, I notice the power is rated at 13 Watts. The rule says no more than 10 Watts continuous for electric solenoids. The reason I say possibly, is that 13 Watts may not be continuous, but I didn’t dig very deeply to find out.
You should read the pneumatic rules thoroughly.
R84.c. Solenoid valves with a maximum ⅛ in. (nominal, ~3 mm) NPT, BSPP, or BSPT
port diameter or integrated quick connect ¼ in. (nominal, ~6mm) outside diameter tubing
connection
I read that as saying that solenoid is illegal because of the 1/4" NPT port.
Edit: I missed that you were using it for a vacuum.
I agree with @Doug_Frisk . This would not be legal as a pneumatic device, as the port is much larger than 1/8" NPT. For non-pneumatic purposes (e.g. vacuum), it would need to comply with the 10W rule (R34, first single-entry row of table). The documentation lists the duty cycle as 100%, but not indefinitely. 
Ok, so if I can find a 10w or under solenoid it sounds like it would be within the rules. I did see the 1/8npt in the rules but it was in the pneumatic section. Anyone have any suggestions that have used vacuum before?
According to the blue box under R84, vacuum systems are not considered pneumatic and do not need to satisfy the pneumatic rules.
Therefore, the port diameter is irrelevant. But I also agree with @Doug_Frisk that this particular solenoid is not legal because it exceeds the 10 Watts rating. If you can find a similar solenoid with less than 10 Watts of power, that should be legal to control your vacuum system.
It would still be considered a pneumatic device if it was hooked into the pneumatic system and depended on the pressure within the system to run through the “vacuum solenoid” and create the vacuum. See [the inverse of] point (d) in the blue box you quoted above.
It will be a stand alone vacuum source. I read the 10W rule as stated
“Electrical solenoid actuators, no greater than 1 in. (nominal) stroke and rated electrical input power no greater than 10 watts (W) continuous duty at 12 volts (VDC)”
I guess I read that as a linear actuator but I believe that is a correct statement that 10W would be the max.
What is the source creating the vacuum?
A gutted Hoover with a redline. 
Not to put too much emphasis on the other posts, this valve is a water valve…
Note that use has an asterisk with no notes. The specifications says it can be used for air and gas but the flow rate is in GPM (gallons per minute). I suspect that the pressure is tested in liquid pressure as well.
Ok, How about this one?
Just wondering, if your vacuum source is a 775’d hoover why do you need a solenoid at all? Would turning the hoover on and off not be sufficient? I can’t imagine you’d be able to generate a significant enough vacuum that you’d be able to close the valve and continue hold whatever your holding.
It’s a bit confusing, but this one isn’t okay either. Under wattage (a synonym for power) for some reason it lists Amps (a unit of current). To actually get the power, you multiply the voltage by the current. 12V * 1.2A = 14.4 Watts. So this solenoid is also over the 10W limit.
We have two different apparatus to change between depending what we are picking up, Hence the 3 way solenoid.
How about this one?
From the spec sheet (page 6), it looks to be rated at 2.5W. Make sure you have the spec sheet available for the inspector, regardless of which solenoid you end up with!
That’s a piloted pneumatic valve. Requires a minimum of 22psig to switch, so no good for switching vacuum.
How fast do you need the switching to be? Will a motorized valve work for you? If not, perhaps a 1/4 turn ball valve (similar to the vent plug, but not used as a pneumatic device) switched by a servo, motor, or pneumatics rather than a solenoid?
What we are trying to do is switch between the two different devices and when switched the vacuum would drain allowing the release of the game piece. We will have to see if the 1/8” npt stuff is enough flow for good vacuum. We were hoping to use 1/4” npt but having trouble finding something that comes in under wattage.
My team used one from a local parts store from automotive application I will try and get you a part number. https://www.sparkfun.com/products/10398 here is a link to a little better vacuum source for suction cups. We have not used this exact one but we have used one from a vacuum saver from Walmart like the one in this link. https://www.amazon.com/FoodSaver-FSFRSH0053-FreshSaver-Handheld-Sealing/dp/B005FBQR38/ref=sr_1_44?ie=UTF8&qid=1548184539&sr=8-44&keywords=food+saver+vacum