https://www.pleasureboatmarine.com/ftp910.html
FTP910 Nauta Marine Holding Tanks, Straight Fill Nipple,...
marine holding tanksnautastraightfillnipple
https://www.wholesalemarine.com/sealand-nozall-15-pumpout-adpater-for-marine-holding-tanks/
Sealand Nozall 1.5" Pumpout Adpater for Marine Holding Tanks
NozAll pumpout adapter will make emptying your holding tank as clean, easy and fast as making a trip to the gas station.
marine holding tankssealand