Water-junction room · Velstraven

A small room of chapter 4. When you walk in, the room card reads: No water reaches the junction's receiver; the service channel runs dry.

Narrated walkthrough

Water-junction room from its entrance — Water-junction room: how to solve it

Getting there

Chapter 4, third upper floor. South of the Pendulum maintenance bay.

What is wrong

"No water reaches the junction's receiver; the service channel runs dry." The pipe's elbow bends up higher than the source water can climb, so nothing gets past the crest even with the stop open.

What you can work

Source: The source tank, holding 8 L, higher than the receiver.
Elbow: The pipe elbow on a fixed pivot, turned by its handwheel. Four detents; only one leads downhill.
Socket: Two open service sockets that step down past the high elbow, with a gap between.
Valve: The source stop, shut.
Drain: Empties the receiver into the lower service line.
Reading lamp: Optional light to read the room by: Handle toggles it, Heat lights it, Supply liquid douses it, Place light roots a lasting flame blossom in its cup. It works none of the room's fittings.
Reading shutter: Optional: Handle or Orient opens a high window for daylight from a second angle. It works none of the room's fittings.

Solution

A nudge

Water only runs downhill. Turned one detent, the bend falls the whole way from source to receiver, so nothing has to climb.

The full solution

Aim at the Elbow and cast Orient (Water, Will, Will) once (or Handle its handwheel once).
Water only runs downhill. Turned one detent, the bend falls the whole way from source to receiver, so nothing has to climb.
What you see: "The elbow turns; its bend now falls from source to receiver."
Handle the Valve and wait about four seconds.
With the stop open, water runs down the falling line at about 0.6 L a second. The room settles once 2 L have arrived and water is still running.
What you see: "The source stop opens." then "Water-junction room settled."

Other ways that work

Conduit (Growth, Water, Will) on the Socket: "A visible plant tube connects the descending sockets." The tube carries water round the high elbow on a falling line. Then open the Valve.

Watch for

Only one elbow position works. Other turns say "The elbow turns; its bend still rises above the source water." Keep turning until it falls.
With the stop open and the bend still high, the stop reads "The source stop stands open, but the water goes no further than the high bend."
Span between the sockets is solid and carries no water.
If you empty the source in experiments, Supply liquid into the Source tops it up (2 L per cast).

If it goes wrong

There is no failed state. The receiver Drain empties the receiver if you want to run it again.
Hold R for one second ("Keep holding to restart from the room's autosave"), or use the pause door "Restart from autosave", to put the room back as it was when you walked in: "Automatic room-entry save restored." Rooms you settled earlier stay settled.

Achievements here

Waters Parted: Solve the Water-junction room.

Spells used

Orient, Conduit, Supply liquid.