sounds like c4 manual flush and the pump needs new seals/washers obtainable from most caravan shop outlets.
here's contact for thetford so contact them for what is needed if you want to change to electric pump obviously you need to get elec to toilet possible off light or run a feed from elsewhere.
the following. gives how to access the thetford free pdf downloads. select toilet download repair info store it.
uk & europe www.thetford-europe.com
australia www.thetford.com.au (even get request from australian campers)
australia site has stockist list.
home page select english {if in australia forget this selection it doesn't come up)
select customer service (top line)
select products from top line
select bulit in or portable which ever applies.
select user information from list on right.
select repair instructions from list on right
select built in or portable which ever applies.
select select your toilet series model number from right list.
you will now be in the pdf listings for your range of toilets just select those that apply to your toilet and down load them they're free.
as you go through watch for 'ask thetford' on left listings
you may not find what you want and you can send them a message.
for safety reasons which i agree with thetford do not offer repair advice for fridges. refer to service centre
bob, December 2010
