Sewer Cistern: Sluice Gate Puzzle | Baldur's Gate 3 (BG3)

This guide shows how to open the Sluice gate in the Abandoned Cistern in The Lower City (Act 3). To open the Sluice Gate, you need to manipulate the valves to get the water level and the heat level to their optimum levels.

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Played on ASUS ROG Strix G533ZX:
Intel i9-12900H CPU @ 5.0 GHz
GeForce RTX 30780 Ti 16GB
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[MrDrainBramaged]

if anyones here again, larian changed it.

Do NOT wait until its perfect water or the temp wont change..do it before it hits perfect or the water will become high before the temp rises to perfect.

[Abs]

I stood there and did this for 10 mins trying to get to minsc before I realised I had already done it earlier on in the game

[tdsarchive]

1. Pull the water valve, and count the number of seconds it takes to hit the green zone. Let it pop.
2. Pull the temperature valve, and count number of seconds to turn green. Let it overheat.
3. Subtract the smaller number from the bigger one. That is your delay time.
4. Pull the reset lever to reset everything.
5. Starting from scratch, pull the slower valve. Count <delay> seconds in your head, then pull the faster valve.

Or the cheese method: save scum and have a high-strength character try to budge the "stuck" valve.

[MrBcuzimbored]

i spent the last 15 minutes trying to get this damn puzzle to work and now i realize I had already opened the gate from the other side so it doesn't do anything lol

[MissAnthropyVR]

Using a character with high strength on the one thats jammed just opens it. Stood there for about 10mins after that getting frustrated because we couldnt work out what the puzzle did. Turns out we had already done it.

[oceanc]

Spent 30 minutes on this and eventually decided to give up so I could keep my sanity. There’s no amount of loot that could get me to try again.

[calathanfoe]

Great job of not explaining anything about the puzzle just like every other video on this puzzle. I turn the levers and nothing works the way it's supposed to, levels NEVER get to "PERFECT" level. Be nice if you actually explained something about this rather than sitting there mute

[_EzGREEN]

I found a door in Baldur’s gate that said “Keep Out” and it took me to a hideout. I cleared the enemies and turned a valve from that side which opened the Vault Door much easier lol

[TheAlarm]

seems like I faced a blocker bug 1st time :D My sluice valve is jammed and water valve refuse to work as well

[MainerZ]

The gate opened for me without even turning any of the valves lol.

[jakobwichmann]

Finally figured out that I shouldn't be spamming the valves but pressing once on the water valve and 2-3sec later tap the other valve once and wait for the water and heat level to rise so the door will open.

[ecp]

Wow, spent about 30 min on this curious why I couldn't get it to work. Then I looked up this video and realized the thing it's supposed to open (door in bottom right of screen) is already open because that's how I came in :/

[LexusFox]

Oh… so I solved the puzzle without realizing that was the end of the puzzle, idk why I was expecting more things to happen 💀

[AndreiJoji]

i kept doing this puzzle not realising i've already solved it before even watching this video. i failed to notice the gate opening at all. LMAO!

[ericdark]

Thanks! I'm always overthinking puzzles.

[kalifani]

My whole squad had to Misty Step just to get to the platform; the ladder was destroyed by enemies during that quick battle. Things don't respawn at all on this game.
Aside: Thanks though for this ...has helped a lot because it works.

[Dero]

omg, i never saw the door open.. been at this for 45 minutes, and nothing happen. I thought.

[joanofsharc]

Your Strength stat affects how much you move it, so these guides are different for everyone (I believe).
The REAL strategy is to not even come from this direction. Near the Undercity entrance/exit, guards are talking to people next to a basement door that will eventually lead you to the other side. I think it's literally just a button to open the sluice.

[Algernon]

This almost made me quit the game. The bullshit fight right before this pissed me off and then this puzzle was bugged for me. I had to load a save from over an hour prior.

[sirmk]

So I just got to this part on my play through and I brute forced the sluice door with Gale! Fucking hilarious every other member in the party failed but Gale rolled up his cloak and said watch this shit 😂