Reimo Camper Van, Motorhome Water Tank Pump Lid
These Reimo pump lids are specifically designed to allow for the water pipe and cable for a submersible pump, to be dropped into the tank.
The basic version has two holes in it to let you pass the hose and cable of the pump through.
The integrated version has a hole for the cable, but then pipe clamps built-in to it to let you securely clamp the external hose to the outside of the lid, with a shorter length of hose then going to the pump. It also has a one way valve to let air into the bottle, but to reduce the chance of any spillage, if you are driving on uneaven ground.
Click here for the compatible Reimo Water Containers, which come complete with a plain lid, for when you need to remove the tank and fill it/empty it.