Downstems 解釋：尺寸、樣式以及如何選擇

下柱是煙槍中最關鍵的組成部分之一 - 煙霧進入水中進行過濾。 了解下莖的尺寸、樣式以及如何測量，可確保您獲得正確的替代或升級。 本指南涵蓋了您需要知道的一切。

快速回答

下柱有兩種接頭尺寸：14mm 和 18mm。 Measure your bong's joint (a dime is slightly larger than 14mm) and the length from joint to 1 inch above base. Diffused downstems (with slits/holes) provide more filtration than open-bottom styles. Most bongs use 14mm joints; larger pieces use 18mm.

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Downstem 將您的碗與水連接起來，具有兩個基本功能：

1. 煙霧輸送: 將煙霧從碗中通過接頭向下流入水中。

2 . 基本過濾：在吸入前產生過濾和冷卻煙霧的氣泡。

如果沒有下柱，煙就會進入水線以上，沒有過濾。 下莖是煙斗而不是乾管的原因。

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接頭尺寸：14mm vs 18mm

14mm接頭

最常見的尺寸。 Used on:

• 中小煙槍（8-14 英吋）
• 許多燒杯棒
• 大多數具有可拆卸下落的泡泡
• 標準水管

如何辨識：一角硬幣（直徑 17.9 毫米）略大於 14 毫米的接頭開口。

18mm接頭

更大的尺寸用於更大的煙槍。 Used on:

• 大煙槍（14 英寸以上）
• 重型科學玻璃
• 一些高級作品
• 許多直管棒

如何辨識: 一角比 18 毫米的接頭開口略小。

快速一角測試

1. 將一角硬幣放在關節開口上

2 。 如果一角大於開口 = 14mm

3. 如果一角小於開口 = 18mm

4. 如果一角硬幣完全適合 = 不常見的 18 毫米（它們的實際尺寸總是略大於 18 毫米）

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測量下莖長度

獲得正確的長度至關重要 - 太短不會到達水，太長會擊中底部。

如何測量：

方法 1 - 具有現有的 downstem：

1. 從 Bong 中刪除 Downstem

2 . 從磨砂接頭部分底部測量到底部尖端

3. 這是你的下線長度

方法 2 - 沒有 downstem：

1. 將鉛筆/筷子插入關節下的角度 下莖會坐

2 . 標記接頭在棍子上的位置

3. 將棒子放低，直到它幾乎接觸到底部（留出 0.5-1 英寸的間隙）

4. 標記這一點

5. 測量標記之間

常見長度：

• 小煙槍：3-3.5 英吋
• 中等煙槍：4-4.5 英吋
• 大煙槍：5-6 英吋

Important: 總是在下莖底部和底座之間留出間隙。 擊中基地：

• 限制氣流
• 可以破解玻璃
• 製造煩人的嘎嘎聲

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低位風格

底部開口（非擴散）

具有開口端的簡單管。

Pros:

• 最大氣流
• 易於清潔
• 最便宜的選擇
• Won't clog

Cons:

• 最少過濾
• 較大的氣泡 = 不太光滑
• 基本性能

Best for: 優先考慮氣流而不是平滑度的用戶，預算構建

切口擴散器

底部切割 3-6 個狹縫的管子。

Pros:

• 泡泡多於開放
• 更好的過濾
• 流動與順暢平衡良好
• 共同且實惠

Cons:

• 可以用樹脂堵塞
• 稍微拖一些
• 需要定期清潔

Best for: 大多數用戶 - 良好的全方位性能

多縫擴散器

許多狹縫 (8-12+) 產生細微擴散。

Pros:

• 非常順暢的點擊
• 優秀的過濾
• 很多小泡泡
• 非常適合刺眼

Cons:

• Most drag
• 更快地堵塞
• 更難清潔
• 更高的成本

Best for: 使用者優先考慮平滑度而不是氣流

花頭擴散器

底部喇叭形，孔排列成圓形，如淋浴噴頭。

Pros:

• 甚至氣泡分佈
• 流暢的表現
• 有趣的視覺
• 良好的過濾

Cons:

• 耀斑處的脆弱
• 適度拖曳
• 更難找到

Best for: 使用者想要獨特的擴散風格

樹過濾器 下莖

多臂，從底部延伸的狹縫。

Pros:

• 最大擴散
• 非常順利
• 令人印象深刻的視覺

Cons:

• Fragile
• Hard to clean
• Significant drag
• Expensive

Best for: Smoothness enthusiasts with careful habits

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Material Options

Borosilicate Glass (Standard)

Most common. Heat-resistant, durable, easy to clean. Clear glass lets you see diffusion. The standard choice for good reason.

Quartz

Premium option. More heat-resistant than borosilicate, very durable. Usually clear or slightly different appearance. Overkill for most users but appreciated by enthusiasts.

Silicone

Flexible and unbreakable. Some silicone bongs use silicone downstems. Won't break if dropped but may retain odors over time. Good for clumsy users.

Titanium

Rare, very durable. Virtually indestructible but changes heat transfer characteristics. Expensive and uncommon.

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Matching Bowls to Downstems

Your bowl must match your downstem's joint size:

• 14mm downstem = 14mm male bowl
• 18mm downstem = 18mm male bowl

Using Adapters

Can't find the right bowl size?

• 18mm female to 14mm male adapter: Uses 14mm bowl with 18mm downstem
• 14mm female to 18mm male adapter: Uses 18mm bowl with 14mm downstem (less common)

Adapters add height and can look odd, but work fine functionally.

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Built-In vs Removable Downstems

Removable Downstems

Most bongs have removable downstems.

Advantages:

• Easy to replace if broken
• Can upgrade to better style
• Easier to clean separately
• Can adjust length if needed

Built-In (Fixed) Downstems

Some bongs have integrated downstems.

Advantages:

• Nothing to break separately
• Cleaner look
• No joint wear over time

Disadvantages:

• Can't upgrade
• If it breaks, replace whole bong
• Harder to clean thoroughly

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Cleaning Your Downstem

Downstems get dirty fast - all smoke passes through them.

Quick Clean:

1. Remove from bong

2. Rinse with hot water

3. Use pipe cleaner for slits

4. Repeat weekly

Deep Clean:

1. Soak in isopropyl alcohol (91%+) for 30 minutes

2. Add coarse salt, shake in bag

3. Use pipe cleaners for slits

4. Rinse thoroughly

5. Dry completely

Preventing Clogs:

• Clean regularly before buildup hardens
• Use screens in bowl to prevent debris
• Change bong water frequently

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When to Replace Your Downstem

Replace if:

• Cracked or chipped (safety risk)
• Slits are permanently clogged
• Joint is worn/loose (wobbles)
• Want to upgrade diffusion style

Average lifespan: 1-3 years with good care. Glass can last longer if handled carefully.

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Choosing the Right Downstem

Consider your priorities:

Prioritize smoothness?

Choose multi-slit or showerhead diffuser

Prioritize airflow?

Choose open-bottom or 3-4 slit diffuser

Prioritize easy cleaning?

Choose open-bottom or minimal slits

Prioritize durability?

Choose thick glass, avoid tree percolators

Budget Guide:

• Basic open/slitted: $5-15
• Quality diffused: $15-30
• Premium/specialty: $30-50+

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Pro Tips

Tip 1: Buy a backup. Downstems break eventually, and having a spare means no interrupted sessions.

Tip 2: Measure twice, buy once. Wrong size is useless.

Tip 3: More slits isn't always better. Consider your lung capacity and airflow preference.

Tip 4: Diffuser downstems can reduce your need for additional percolators, saving money and complexity.

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This guide is for educational purposes. Cannabis laws vary by jurisdiction.