DownStems 解释：尺寸、样式和如何选择

下干是你烟枪中最关键的成分之一——它是烟雾进入水中进行过滤的地方。 了解下行尺寸、样式以及如何测量可确保您获得正确的更换或升级。 本指南涵盖了您需要知道的所有内容。

快速回答

下茎有两种接头尺寸：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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下行有什么作用？

下干将您的碗连接到水中，具有两个基本功能：

1。 烟雾送货：将来自碗的烟雾通过接缝和向下进入水中。

2 . 基本过滤：产生气泡，在吸入前过滤并冷却烟雾。

如果没有下流，烟雾将在没有过滤的情况下进入水管上方。 下干是使烟斗成为烟枪而不是干管的原因。

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接头尺寸：14mm vs 18mm

14mm 接头

最常见的尺寸。 Used on:

• 中小型烟枪（8-14 英寸）
• 许多烧杯烟枪
• 大多数具有可拆卸下部的起泡器
• 标准水管

如何识别：一角硬币（直径 17.9 毫米）略大于 14 毫米的接头开口。

18mm 接头

更大的尺寸用于更大的烟枪。 Used on:

• 大烟枪（14+英寸）
• 重型科学玻璃
• 一些高级作品
• 许多直管式烟枪

如何识别：一角钱比 18 毫米的接头开口略小。

快速一角硬币测试

1。 在关节开口上保持一角硬币

2 。 如果一角大于开口 = 14mm

3。 如果 DIME 小于开口 = 18mm

4。 如果一角钱完全适合 = 不常见的 18 毫米（它们总是略大于 18 毫米实际）

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测量下杆长度

正确的长度至关重要 - 太短不会到达水，太长会击中基地。

测量方法：

方法一-与现有的下仓：

1。 从 Bong 中移除 Dowstsem

2 . 从磨砂关节部分到底部的测量

3。 这是你的下茎长度

方法2 - 无下流：

1。 将铅笔/筷子以下垂的角度插入关节中

2 . 标记接头在棒上的结束位置

3。 降低直至几乎接触底座（留0.5-1英寸的间隙）

4。 标记这一点

5. 测量标记之间

常用长度：

• 小烟枪：3-3.5英寸
• 中型枪：4-4.5英寸
• 大烟枪：5-6英寸

Important：始终在下茎底部和底座之间留出间隙。 击中基地：

• 限制气流
• 可以开裂玻璃
• 造成烦人的嘎嘎声

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下风风格

开口底部（非扩散）

开放式端的简单管。

Pros:

• 最大气流
• 易于清洁
• 最便宜的选择
• Won't clog

Cons:

• 最少过滤
• 较大的气泡 = 较少光滑
• 基本性能

Best for：将气流优先于平稳性的用户，预算建立

分形扩散器

底部有 3-6 个狭缝的管子。

Pros:

• 泡沫多于打开
• 更好的过滤
• 良好的流动和平滑度平衡
• 普通且实惠

Cons:

• 可以用树脂堵塞
• 稍微多一点的阻力
• 需要定期清洁

Best for: 大多数用户 - 良好的全方位性能

多缝散射器

许多狭缝（8-12+）产生细小的扩散。

Pros:

• 非常流畅的命中
• 出色的过滤
• 很多小气泡
• 非常适合刺鼻的花

Cons:

• Most drag
• 堵塞速度更快
• 更难清洁
• 更高的成本

Best for：用户优先考虑平滑度而不是气流

淋浴喷头扩散器

喇叭形底部，孔中排列成圆形，像淋浴喷头。

Pros:

• 均匀分布
• 性能平稳
• 有趣的视觉
• 良好的过滤

Cons:

• 耀斑时可能很脆弱
• 中等阻力
• 更难找到

Best for：想要独特的扩散风格的用户

树木渗透器下部

多臂，有从底部延伸的狭缝。

Pros:

• 最大扩散
• 很顺利
• 令人印象深刻的视觉

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.