Hydroponics Bulkhead / Drain + Hose coupling for 4" PVC

Bulkhead fitting contoured to the shape of a 4" PVC tube for a better water seal.

Will update the description with the o-ring sizes that I used.

My other 4" PVC pipe designs:
Hydroponics 4" pipe clamp for use with 3mm paracord
Hydroponics Net Cup / Pot System for 4inch PVC Pipe