Should top of Drainage Chambers be Level ?

[Spinny]

Just wondered are the tops of drainage chambers supposed to sit level if you put a spirit level on them in both directions - I  mean across the chamber itself rather than the cover ?

Just thinking presumably they are made with slight angles/falls on the outlets/inlets. so designed to sit square at the top ?

[Mr Punter]

spirit level accuracy not required but obvs the fall must be in the correct direction.

[Gus Potter]

1 hour ago, Spinny said:

Just wondered are the tops of drainage chambers supposed to sit level if you put a spirit level on them in both directions - I  mean across the chamber itself rather than the cover ?

Yes. The cover can sit at angle.

[Spinny]

OK thanks. It is just that I have had someone reconfiguring a toilet outlet and suspect the chamber may have been disturbed in the process...

[crispy_wafer]

as suggested, as long as the fall is in the right direction at the base it'll be ok.  The risers can be trimmed carefully so that they appear horizontal, like most things easier said than done though.

[MortarThePoint]

I don't want to get flamed for it, but some manufacturers say that chambers (mini ones) don't need to be installed with a fall. I install them with a fall though. In my experience (limited) the chamber bottom and rim are parallel so you can check wall at the top.