JABSCO TOILET ASSEMBLY

[Dan Alsop]

Help! I am fitting a service kit to a two year old but unreliable twist and lock version. The old joker valve has distorted so that the 3 vents remain permanently open, hopefully explaining why the discharge pumping has been so poor. However my question is - which way up does the "base valve gasket" go? (Part 16 on the diagrams) I can't tell from the diagram and did not note this when dismantling.
Dan Alsop

 

[VicS]

Bump facing upwards. It will only fit on the 3 locating posts one way.

See the Jabsco video on replacing the base valve gasket.
https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.youtube.com/watch?v=niZ2rKsf53M&ved=2ahUKEwis-8qA14uEAxV1RkEAHXeLD2UQwqsBegQIARAE&sqi=2&usg=AOvVaw1_d8GIU-xl89OqvEa0FNLv

See also the video on replacing the top valve gasket