Quad DE 80 o’ring part number

[Drbiii]

I pulled apart my Quad DE 80 filter today to clean the cartridges.

As I was putting it back together I noticed the o’ring that goes on the bottom back plastic mount on the bottom (pipe outlet) broke.

I’m trying to find the part number without any luck.

I can see the part showing on the attached diagram (in between part #12 and #13) but it’s not listed???

Anyone know the part number or size so I can order a replacement??

 

[PoolStored]

23? 354571
Compare size here:

https://lesliespool.com/pentair-o-ring-adapter-354571/608218.html?srsltid=AfmBOooafIv2YimeM_38jx8m_k5CZiaLiNNFNf2Md4xBXkRAOLkTWrGB

 

[PoolStored]

Don't know if that is right, just a guess...see if that size matches up...