Heard, Chairman. Aquarium tubing + hand-made fittings? Easy. Here’s a dead-simple, bombproof DIY halo that actually wets evenly.
What you need (scavenge list)
- Aquarium tubing (3/16" or 1/4" OD vinyl)
- Hole maker: a heated sewing needle or 22–24 g hypodermic (cleanest holes); tiny micro-drill (0.6–1.0 mm) also works
- Couplers: short pieces of solid copper wire (14–12 AWG) or Q-tip stem/BIC pen tube as a stiff core + heat-shrink or electrical tape as the sleeve
- Branch/Y parts: a 1–1.5" bit of brass hobby tube or pen tube with a side hole (see below)
- Clamps: micro zip-ties or thread whip + a drop of superglue (let cure fully)
- Inline filter (DIY): film canister/pill bottle with inlet/outlet holes + a wad of aquarium floss/coffee filter inside
- Flush plug: a golf tee or a short tail you can knot and unknot
Ring size & hole pattern (for your 5-gal fabric pots)
- Ring OD: 9–10" (keep 2" dry donut around the stem).
- Emitter: you said 15 L/hr (≈250 mL/min) feeding the ring.
- Holes: 20–24 holes of 0.6–0.8 mm each, spaced ~1.5"apart.
- Aim each hole 30° inward / 15° downward (gentle rain, no cratering).
- Pressure balance: add +2 holes on the side opposite the inlet, or feed from both sides (below).
Quick runtime math (at 15 L/hr total)
- 1 cup (≈237 mL) → ~1 min
- 500 mL → 2 min
- 1 L → 4 min
- 1 quart (0.95 L) → ~3.8 min
Build it (three options)
A) Single-feed ring (fastest)
- Cut tubing to length (circumference ≈ π·D; for 10" ring ≈ 31.4").
- Couple the ends: slide a 1" copper wire stub halfway into one end, then the other; sleeve with heat-shrink; cinch with a zip-tie if needed.
- Add a flush tail: tee off near the inlet (or just add a short stub at the far side) and knot it—undo to flush.
- Punch holes: start 0.6–0.8 mm, every ~1.5" around; skip two holes closest to the stem; add +2 holes on the far side.
Pros: zero drama.
Cons: slight flow bias unless you added the extra holes.
You’ll “Y” the feed so water enters the ring from
both sides.
DIY Y-connector:
- Use a 1" pen tube section as a manifold. Drill/punch three ports in a “Y”: one inlet, two outlets (120° apart).
- Insert tubing ends inside the manifold; wrap tightly with thread, add a tiny bit of glue, then heat-shrink over it.
- Alternatively, flatten a 1" segment of tubing with pliers, punch a centered hole for the branch, and sleeve the junction with heat-shrink.
Then build the ring as in (A), but feed both ends. Hole spacing can be perfectly even (no extra holes needed).
C) Double-ring (for big, thirsty girls)
Two concentric rings:
inner at ~3.5" radius,
outer at ~5".
- Split the 15 L/hr feed using the DIY Y (≈7.5 L/hr each).
- Inner ring: 12 holes; outer ring: 16 holes; same hole size/angles.
- This keeps the stem dry and wets the mid-root and edge evenly.
Hand-made fittings that don’t leak
- Straight coupler: solid 14 AWG copper core + heat-shrink = instant barb.
- T/Y junction: pen tube or brass hobby tube with three punched holes; jam the vinyl on and sleeve with heat-shrink.
- Check “clamps”: micro zip-ties; heat-shrink over joints for belt-and-suspenders.
- End cap/plug: a golf tee is the perfect removable stop.
Filter & anti-clog
- Put your DIY floss filter upstream of the ring.
- Flush weekly: undo knot / pull golf-tee, run 10–20 sec.
- If a hole clogs, re-pierce with the heated needle. If flow is too strong, don’t drill bigger—add more holes.
Tuning it to your 15 L/hr emitter
- If you see stronger spray near the inlet on a single-feed ring:
- Add 1–2 pin holes on the far side, or
- Pinch the first 2–3 holes slightly smaller (heat the puncture very lightly so it “shrinks”), or
- Upgrade to Dual-feed—that’s the clean fix.
My fitting trick is superglue around a pen body cut to size (1/4" tails) and stick it in a tube, then slowly turn it with needle nose inside it until the glue stos it, then leak test and or shrink electrical tape outside.
www.thcfarmer.com
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