Key takeaways
- Valve 1 — Thermal Vents, south edge. On the rock arch above the first plume you passed. Easy to hit on the way down.
- Valve 2 — Kelp Trench, mid-corridor. Mounted on the right wall at roughly 210 m, behind a curtain of kelp. Visible only when you are close.
- Valve 3 — Shallow Shelf, deep edge. Tucked under the overhang at about 110 m, past the coral fans.
All Tubes in Abyss Roblox: Every Location and the Fastest Route to Each
There are six collectible tubes in Abyss on Roblox, and they are spread across four vertical zones: the Shallow Shelf, the Kelp Trench, the Thermal Vents, and the Midnight Basin. Two sit in plain sight along the main descent, two require a short detour into side caves, one is hidden behind a breakable wall, and the last only spawns after you activate the three pressure valves. Below is every tube mapped by zone, with the route that gets you there fastest and the gear you need before you dive.
Quick reference: all six tubes at a glance
| # | Tube | Zone | Approx. depth | Entry requirement | Typical time to reach |
|---|---|---|---|---|---|
| 1 | Brass Tube | Shallow Shelf | 40 m | None | 1–2 min |
| 2 | Coral Tube | Shallow Shelf | 85 m | None | 3–5 min |
| 3 | Kelp Tube | Kelp Trench | 190 m | Basic oxygen tank | 6–8 min |
| 4 | Rusted Tube | Kelp Trench | 240 m | Tier-2 light source | 8–11 min |
| 5 | Vent Tube | Thermal Vents | 430 m | Heat-resistant suit | 14–18 min |
| 6 | Abyss Tube | Midnight Basin | 620 m | All three valves opened | 22–30 min |
Total run time for a full sweep, done efficiently and without backtracking, lands around 25–35 minutes for most players. The single biggest time sink is not the depth — it is re-climbing from the Basin because you forgot a valve. Do the valves on the way down, never on the way back.
Zone 1: Shallow Shelf (Brass Tube and Coral Tube)
Brass Tube — depth 40 m
Spawn facing the water and swim straight down along the anchor chain until you hit the flat rock shelf. Turn left. The Brass Tube sits wedged in a rock crevice about fifteen body-lengths past the broken cargo crate. It is the easiest pickup in the game and virtually impossible to miss if you follow the chain rather than drifting right into open water. No gear required — you can free-dive to it on a single breath.
Coral Tube — depth 85 m
From the Brass Tube, do not surface. Turn right and follow the wall downward with the reef on your left shoulder. At roughly 80 m you will pass a cluster of orange fan coral; the Coral Tube rests on top of the largest fan. It blends into the coral colour, so sweep your cursor over the fans until the pickup prompt appears rather than trying to spot it visually. If you hit 100 m you have gone too far and drifted off the wall.
Zone 2: Kelp Trench (Kelp Tube and Rusted Tube)
The Trench is the first zone where oxygen management matters. From the shelf, drop into the gap between the two rock spires — the one with the faint current shimmering at its mouth. Fighting the current burns stamina, so hug the left wall where flow is weakest.
Kelp Tube — depth 190 m
Once inside the Trench, descend past the two glowing jellyfish markers. The Kelp Tube is wrapped in the tall kelp stalk on the right side of the corridor at about 190 m. It is visible from a distance as a distinct cylindrical outline that does not sway with the current — that stillness is the tell. Grab it on the way down; the stalk is directly on the main line, so this costs you almost no extra time.
Rusted Tube — depth 240 m
This is the first real detour. Continue to the Trench floor at 240 m and look for a narrow side cave on the left, marked by a rusted pipe protruding from the rock. Inside, the tunnel bends sharply twice and ends in a small chamber where the Rusted Tube lies in the silt. Bring a Tier-2 light source or better — the chamber has no ambient light and the pickup prompt only renders within a short radius. Budget roughly 90 seconds for the in-and-out.
Route note: the side cave entrance is at the exact floor level, so it is easy to overshoot while still moving downward. Level out the moment your depth readout shows 235 m and scan left.
Zone 3: Thermal Vents (Vent Tube)
Vent Tube — depth 430 m
The Vents are a maze of vertical plumes, and swimming through one drains health fast. The Vent Tube sits on the third plume from the left, resting on a ledge just outside the heat radius. Approach from the side, not from above — descending straight through a plume will cost you a chunk of health and force a retreat.
Practical clearance tip: there is roughly a two-body-width gap between the plume wall and the rock ledge. Hug the rock and move laterally until you are level with the tube, then close in. If your heat meter starts ticking, you are inside the plume radius and should back off before grabbing.
Zone 4: Midnight Basin (Abyss Tube and the three valves)
The final tube will not appear unless all three pressure valves are open. This is the step where most players lose ten minutes.
Valve locations
- Valve 1 — Thermal Vents, south edge. On the rock arch above the first plume you passed. Easy to hit on the way down.
- Valve 2 — Kelp Trench, mid-corridor. Mounted on the right wall at roughly 210 m, behind a curtain of kelp. Visible only when you are close.
- Valve 3 — Shallow Shelf, deep edge. Tucked under the overhang at about 110 m, past the coral fans.
Optimal order is Valve 3 first, then Valve 2, then Valve 1, then continue down — you are descending anyway, so the valves stack neatly onto the same line instead of forcing a climb. If you reach the Basin and the Abyss Tube is not there, one valve is still closed; the standard culprit is Valve 2, because the kelp curtain hides it until you are almost touching it.
Abyss Tube — depth 620 m
With all valves open, a sealed door on the Basin floor slides back. Swim into the opening and follow the corridor to its end, where the Abyss Tube sits on a stone plinth. The corridor is one-way inward but the exit is a vertical shaft on the right — do not panic when the entrance closes behind you.
Gear, oxygen and depth limits
| Gear tier | Safe working depth | Oxygen reserve | What it unlocks |
|---|---|---|---|
| None (free-dive) | ~90 m | Single breath | Brass Tube only |
| Basic tank | ~250 m | Roughly 3 min | Coral, Kelp, Rusted |
| Reinforced tank | ~470 m | Roughly 6 min | Vent Tube |
| Reinforced + heat suit | ~700 m | Roughly 8 min | Abyss Tube and valves |
Two rules that save the most runs: surface with at least 25 percent oxygen remaining, because the last stretch of every ascent always takes longer than you expect, and never carry a full inventory — if your bag is full when you touch a tube, the pickup fails silently and you will assume the spawn is bugged.
Common mistakes that waste time
- Drifting off the anchor chain on the Shallow Shelf and missing the Brass Tube entirely.
- Passing the Rusted Tube’s side cave because you were still descending past 240 m.
- Swimming straight down through a thermal plume instead of approaching the Vent Tube laterally.
- Skipping Valve 2 on the descent and having to climb back for it.
- Reaching the Basin with no oxygen left and no way to open the door.
FAQ
Do the tubes respawn?
They reset with the server session. If you join a fresh server, all six are back — but so are the valves, so the Basin still requires the full three-valve sequence.
Can I get the Abyss Tube without the heat suit?
No. The corridor past the sealed door sits inside a persistent heat zone, and the health drain will drop you before you reach the plinth.
What is the fastest single-tube route?
If you only need one tube, the Coral Tube is the best value: about four minutes round trip from spawn, no gear, and it sits directly on the reef wall so there is no search component.
