What is this part called?

[Taylorbay]

This red piece is at the bottom of my skimmer and when you push it in, shuts the water off to the pump/filter, pull it out and it opens it. I’ve lost the red piece and need to replace but cannot find because I don’t know what it’s calked. Help please

 

[Rancho Cost-a-Lotta]

A Push/Pull Valve (Handle). Try googling that along with your filter make/model.

 

[jblizzle]

The full part is often called a gate valve.

 

[JamesW]

AKA Slice valve.

 

[Taylorbay]

Thank you all, I found it