Nuevo 2006 waste tank

Waste tank full dirty water came up through plug holes in toilet shower room.

Cleaned pipes flushed tank, when draining basin. Sink making all kinds of noise.

I have to have the main drain tap open a little so water can drain from sink b basin.

Does tank have a filter?



Also. Need to replace the white trim that goes round motorhome door and gas bottle door
Would anyone know where to get it.

Rgds

For the trim, search  Ebay for awning rail infill.

The tank doesn't have a filter. But it does have raised vent slots on the top surface. I think there are four, one on each corner. You need to feel along the top for them. They're only small and easily get blocked if you let the tank get full, as the scum and soapy water congeals on the surface. Poke them out with a small screwdriver or something. The first sign they're blocked is if water comes up through the shower drains. Once they're clear the basin should flow quicker as the displaced air has somewhere to go.
Al.

Thanks job for weekend.

Roof vent Nuevo 
I’ve just broken the catch on the hinge/arm, do I have to replace the whole unit or is it possible to mend one side?
We are able to close the vent completely and one side is still in operation, would be grateful for any suggestions.
Thank you.