Cold-Brew Tower
V1
·
V2.1
·
V2.2
3D
♪
Cold-brew tower, V2.2
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
front
side
top
back
¾
brew
section
assembly
hide
done
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Refs
Apparatus for the two-stage filtration of cold coffee, V2.2
Lab-notebook plate of a wall-mounted cold-brew tower, V2.2: a 1 L perforated-plate funnel drains into a 125 mL separatory funnel whose tip releases a free drop onto the grounds in a 500 mL funnel with a paper disc, over a 1 L round-bottom flask; vacuum from a diaphragm pump on a side shelf, hosed straight to the funnel's arm. Printed cages on printed ledgers, one uncut board on aluminium French cleats.
Apparatus for the Two-Stage Filtration of Cold Coffee
wall-mounted · V2.2
H
A
C
I
D
E
K
slurry in
grounds bed ≈ 5 cm
100 µm mesh / 1.5 mm plate
joint clip, 24/40
stopcock, throttled
free drop, 45 above D
70 mm paper
F
vent, open
cleat (behind)
J
G
130
oil-free diaphragm pump
10 L/min
board 1219 mm
A’s rim 2600 above floor · E’s bottom 1673
235 mm board (1×10)
Fig. 1.
— Front elevation, 1 unit = 1 mm.
wall
aluminium French cleat
vent standpipe
PETG ledger, #8 screws
in slots, on a stop pin
lower cleat,
lock screw
110
138.5
A’s rim 2600
C’s tip 2133
D’s rim 2088
E’s bottom 1673
Fig. 2.
— Side section at the glass axis, ½ scale.
drip tip
D cage, 20 below rim
70 mm paper, drained
45
176
Fig. 3.
— The free drop, 1.5×.
P0
Fit rings
P1
A cage, rear saddle
P2
A cage, keeper
P3
C guide ring + arm
P4
D cage, rear saddle
P5
D cage, keeper
P6
E ring seat
P7
Pump shelf: front + back
plates, foot plate, deck
P8
Hose bracket, clips ×2
P9
Drill jig, 5 pieces
P10
Ledgers A, C, D, E
Fig. 4.
— Printed parts, exploded. PETG · 0.20 mm.
References to Fig. 1
A.
Filter funnel, 1000 mL. 1.5 mm perforated plate,
100 µm mesh disc; vent arm.
C.
Separatory funnel, 125 mL, PTFE stopcock.
D.
Büchner funnel, 500 mL. Perforated plate, 70 mm paper;
vacuum arm.
E.
Round-bottom flask, 1 L, 24/40, printed ring seat.
F.
Vent standpipe, silicone tube, open above A.
G.
Vacuum: hose level off D's arm, arcing down to an
oil-free diaphragm pump, 10 L/min, on isolators.
H.
Cages, guide and seat, PETG, silicone-lined.
M5 thumbscrews into the ledgers.
I.
Ledgers, PETG. #8 screws in slots, stop pins.
J.
Pump shelf, PETG, off the board's edge.
K.
Board, 1×10 × 4 ft (235 × 19 × 1219), aluminium
French cleats ×2, lock screw.
Hardware
aluminium French cleat pairs ×2 · anchors ×2
#10 × 3″ ×3 · lock screw #8 × 2-1/2″ ×1
#8 × 1″ pan heads ×8 + washers ×8
#8 × ⅝″ pan heads ×6 · stop pins Ø6 × 24 ×4
#8 × ¾″ flat heads ×10 · #8 × ⅞″ flat heads ×4
joint clips ×2 · M5 × 35 pan heads ×6 + nuts ×12
M5 × 20 thumbscrews ×2 · M5 × 30 thumbscrews ×4
silicone strip 1.6 mm
pins Ø6 × 16 ×3
Notes
vacuum on D only
vent open above A’s rim
C’s tip 45 above D’s rim
all joints 24/40, clipped
glass leaves forward: C, A, D, E
every hole drilled through the jig (P9)
pump sizes ≈ from a photo: measure
0
50
100
150
200
mm, at Fig. 1 scale
Run
135 g / 1 L, fine, 18 h → Pour 18 hour steep in A → C throttled
→ free drop → D under vacuum → E
Cold-brew tower, V2.2
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
Apparatus for the Two-Stage
Filtration of Cold Coffee
Cold-brew tower, V1
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
0
50
100
150
200
mm, at Fig. 1 scale
Apparatus for the two-stage filtration of cold coffee, V1
Lab-notebook plate of a wall-mounted cold-brew tower: a 1 L perforated-plate funnel with a mesh disc drains through a Vigreux column into a 125 mL separatory funnel, which meters coffee into a 500 mL funnel with a paper disc over a 1 L round-bottom flask under gentle vacuum. Printed yokes on two dowel posts, cleat-hung backboard.
Apparatus for the Two-Stage Filtration of Cold Coffee
wall-mounted · V1
A
B
C
D
E
H
I
K
J
F
G
slurry in
grounds bed ≈ 5 cm
100 µm mesh / 1.5 mm plate
vent, open
Vigreux, 24/40
joint clips, 24/40
stopcock: D half full
70 mm paper
−0.2 bar
cleat (behind)
overall ≈ 1243 mm (49 in)
A’s rim to shelf 1128 mm
235 mm board (1×10)
Fig. 1.
— Front elevation, 0.9×.
wall
French cleat, 45°
bracket: split collar, gusset
mid bracket
ring seat
shelf in a dado
19 mm blind holes
counter
90
A's rim ≈ 1.15 m above counter
Fig. 2.
— Side elevation, 0.45×.
200 c-c
front
Ø19.4 bore
(¾″ dowel)
M5 thumbscrew
+ heat-set insert
Ø3 × 6 pins
seat Ø81, 39°
1.6 silicone liner
18 mm front slot
0.8 chamfers
split collar,
2.2 slit
Fig. 3.
— Yoke
H
, plan. PETG.
C ring Ø52 · D ring Ø88
no mesh
100 µm mesh
1.5 mm
glass
plate
grind
0.2–0.5 mm
Fig. 4.
— A’s plate in section, 20×.
References to Fig. 1
A.
Charging funnel, 1000 mL. 1.5 mm perforated plate,
100 µm mesh disc.
B.
Vigreux column, 24/40, 300 mm.
C.
Separatory funnel, 125 mL, PTFE stopcock.
D.
Büchner funnel, 500 mL. Perforated plate, 70 mm paper.
E.
Round-bottom flask, 1 L, 24/40, printed ring seat.
F.
Vent arm, silicone tube, pinch clamp.
G.
Vacuum: hose from D's arm, looped up, to a
diaphragm pump on a post shelf.
H.
Yokes, PETG, lined. Split collars, M5 thumbscrews.
I.
Posts, ¾ in. (19 mm) hardwood dowel.
J.
Shelf, 190 mm deep, in a dado; 19 mm blind holes.
K.
Backboard, 1×10 (235 × 19 mm), cleat, spacer.
Notes
vacuum on D only
A ≈ 1 L above plate; pour in 2
rinse B after each run
all joints 24/40, clipped
A → C direct: −26 cm
Cold-brew tower, V1
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
0
50
100
150
200
mm, at Fig. 1 scale
Run
135 g / 1 L, fine, 18 h → A in 2 pours → first 150 mL back over bed
→ C set to half-fill D → −0.2 bar → E
Apparatus for the Two-Stage
Filtration of Cold Coffee
Cold-brew tower, V2.1
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
Apparatus for the two-stage filtration of cold coffee, V2.1
Lab-notebook plate of a wall-mounted cold-brew tower, V2.1: a 1 L perforated-plate funnel drains into a 125 mL separatory funnel whose tip releases a free drop onto the grounds in a 500 mL funnel with a paper disc, over a 1 L round-bottom flask; vacuum from a diaphragm pump on a side shelf, hosed straight to the funnel's arm. Printed cages on hardwood ledgers, one cleat-hung board.
Apparatus for the Two-Stage Filtration of Cold Coffee
wall-mounted · V2.1
H
A
C
I
D
E
K
slurry in
grounds bed ≈ 5 cm
100 µm mesh / 1.5 mm plate
joint clip, 24/40
stopcock, throttled
free drop, 45 above D
70 mm paper
F
vent, open
cleat (behind)
J
G
130
oil-free diaphragm pump
10 L/min
board 1195 mm
A’s rim 2600 above floor · E’s bottom 1673
235 mm board (1×10)
Fig. 1.
— Front elevation, 1 unit = 1 mm.
wall
French cleat, 45°
vent standpipe
ledger, M6 countersunk
on a stop pin
anti-lift spacer
110
148
A’s rim 2600
C’s tip 2133
D’s rim 2088
E’s bottom 1673
Fig. 2.
— Side section at the glass axis, ½ scale.
drip tip
D cage, 20 below rim
70 mm paper, drained
45
176
Fig. 3.
— The free drop, 1.5×.
P0
Fit rings
P1
A cage, rear saddle
P2
A cage, keeper
P3
C guide ring + arm
P4
D cage, rear saddle
P5
D cage, keeper
P6
E ring seat
P7
Pump shelf: brackets ×2,
foot plate
P8
Hose bracket, clips ×2
P9
Drill jig
Fig. 4.
— Printed parts, exploded. PETG · 0.20 mm.
References to Fig. 1
A.
Filter funnel, 1000 mL. 1.5 mm perforated plate,
100 µm mesh disc; vent arm.
C.
Separatory funnel, 125 mL, PTFE stopcock.
D.
Büchner funnel, 500 mL. Perforated plate, 70 mm paper;
vacuum arm.
E.
Round-bottom flask, 1 L, 24/40, printed ring seat.
F.
Vent standpipe, silicone tube, open above A.
G.
Vacuum: hose level off D's arm, arcing down to an
oil-free diaphragm pump, 10 L/min, on isolators.
H.
Cages, guide and seat, PETG, silicone-lined.
M5 thumbscrews into the ledgers.
I.
Ledgers, hardwood. M6 countersunk, stop pins.
J.
Pump shelf, off the board's edge. PETG brackets.
K.
Board, 1×10 (235 × 19 mm), 45° French cleat,
anti-lift spacer.
Notes
vacuum on D only
vent open above A’s rim
C’s tip 45 above D’s rim
all joints 24/40, clipped
glass leaves forward: C, A, D, E
pump sizes ≈ from a photo: measure
0
50
100
150
200
mm, at Fig. 1 scale
Run
135 g / 1 L, fine, 18 h → Pour 18 hour steep in A → C throttled
→ free drop → D under vacuum → E
Cold-brew tower, V2.1
Last updated
5 Oct 2026
Units
mm; Fig. 1 to scale
Glass
borosilicate, 24/40
Sheet
1 of 1
V1
Vigreux · two posts
V2.1
hardwood ledgers
V2.2
printed ledgers
Apparatus for the Two-Stage
Filtration of Cold Coffee