I have already completed the Sewer of Horrors quest. On my second visit, after throwing all four < switches, the gate in the poison golem area that warps you to the stairs down does not open up. The only difference from my first visit I can think of is that I switched the one in the devourer area last this time because I forgot about it.
Maybe they have to go in a certain order, but just in case that's not so, I thought I should post here.
EDIT: For anyone else searching on this topic--short answer is there are 5 levers, not 4.
Maybe they have to go in a certain order, but just in case that's not so, I thought I should post here.
EDIT: For anyone else searching on this topic--short answer is there are 5 levers, not 4.