I have finally managed to locate my toilet waste tank...it is under the floorboards in the bathroom, which I wasn't expecting at all to be honest! It must be a very shallow wide tank, as there are pump out lines on both sides of the boat, a 39ft East West Marine built in 2009..
I think I may have found the sender, can anyone confirm that this is what one looks like? The two black hoses at the back are the starboard side pump out and rinse out hoses
Any ideas how easy is would be to remove and replace the sender? It looks like it might be hard to remove, or do they just unscrew?