Hello people as title says I'm brand new to this site , I've just bought another van only my 3rd one... this 1s the best I've had though it's a avondale rialto 550/4 99'mod. And still feeling my way around it
Welcome to the Forum Rialto.
I see you have a technical problem with your pump. If you ask the question under the Technical section you will get lots of answers. Maybe one of the Mods could move it for you.
Is a submersible pump placed in the Squarely or on board. What make?
Sounds like an air leak where the pump plugs into the side of the caravan.There is a rubber O ring that perishes
There are many other causes which we will follow up.