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[smeeprocket]

Okay so I have this nice little fort going next to a volcano.

I built a stairway all the way down to the level I want the magma at for my forges, I had a floodgate installed where the magma would flow and a level attached to it. So I channeled from above to release the magma at the topmost level and released the floodgate, filling a pit I had ready for the magma a number of levels below that.

But the magma kept filling up0, above the pit and I had to wall off a section of my fort or get flooded with magma. The floodgate didn't stay in place, it just flowed along the magma river I had made.

My problem is, I am not sure how to access the magma for forges without it filling up whatever I dig out when I channel into it where it has filled up my fort.

I hope that makes sense. Basically I need a way to block the path of the magma, and it has to be done from above.

[LMeire]

Make it flow through a diagonal to neutralize the pressure, or else just build above the upper-most screwpump. It won't flood upwards if there's no pressure to force it up.

EDIT: Also it sounds like you used non-magma safe floodgates or mechanisms, magma is significantly hotter than fire and working with it requires the use of very specific materials like iron, glass, basalt, obsidian, etc. A shale mechanism will just melt and break the floodgate.

[smeeprocket]

I used obsidian, the floodgate held until I flipped the lever then it went flying. I'm not using a screwpump, it's the natural flow of the magma. I've looked it over and I'm not sure I can install a screwpump. One side would have to be at level with the magma, and I can't get there without fiery death.

I don't have a way to take a screenshot, can you advise what would be the best way to do that?

[Ant]

I usually take my screenshots with PrtScr and then using IfanView paste (ctrl+v) it for editing. Clunky but useable.

[utunnels]

I used obsidian, the floodgate held until I flipped the lever then it went flying.

Both the gate and the mechanism should be magma safe.

[smeeprocket]

Ahh the mechanism must not have been magma safe.

Goblins overwhelmed my fort anyway but now I know better.

[miauw62]

If you're not using a screwpump, the pressure will push the magma up until it reaches the level of magma in the volcano (which, iirc, refills). You need a screwpump or a diagonal tile to undo the pressure.