Are you 100% positive thatís where it is leaking? Mine leaked last year and it was actually the flush valve that the line screws into. Water dripping down the connection made it seems as though it was leaking there when it was actually the small crack in the valve. Common problem, $20 cost, and an easy fix if itís indeed the flush valve.
1999 Suburban 2500 4x4
2016 Jayflight 23RB Elite, Fiberglass, Polar Package
400w Renogy RV solar kit w/ Bluetooth, 100w Renogy solar suitcase
430 amp/hr 6v battery bank
1000w Renogy hard wired inverter
2011 F350 Lariat, DWR 4x4, 6.7 turbo diesel
2017 Open Range, Mesa Ridge 374BHS