Pipe 2.5 (F) to Pipe 2.5 (F)

Female-Female Coupler

2.5 (in) Pipe Fits: POWERTEC 70176V Clear PVC Pipe 2-1/2"https://www.amazon.com/dp/B09NKWPT1C

Broadly speaking I hate this pipe as it's a non-standard size and their fitting are poorly labeled and designed to minimize cost while hurting their performance. ...But, it's a fair bit cheaper than PVC of similar diameter.