With a PS4 I would run 1- 1" and 1- 1 1/2" in your overflow. The 1 1/2" will be your emergency drain with a standpipe about an 1 1/2" from the top of your overflow. The 1" should come half way up your overflow, and have a ball valve on the outlet to regulate the flow. Adjust the flow on the 1" so water just trickles into the 1 1/2" standpipe. This system is totally silent with no bubbles.
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