What is this part?
 

Can some one tell me what part this is? I have searched for Fuel System Diagrams but can not find anything that helps me identify what it is. It is connected to a line coming from the front of the vehicle and then to a line connected to the fuel tank. One of the nipples broke off when trying to remove the fuel line as I was replacing the fuel tank so I need to replace it but not sure what it is.

Thinking maybe a Fuel Check Valve or a vapor valve?
https://cimg1.ibsrv.net/gimg/www.maz...0fa22c2a16.jpg

It's called the Check and Cut valve

https://cimg3.ibsrv.net/gimg/www.maz...34e9eb086b.jpg

Looks like some for similar era RX7 are still available. Probably the same basic part.

https://www.ebay.com/itm/NEW-OUT-OF-...EAAOSwWktaX1Cf