Skip to content

Facebook
X (Twitter)
Instagram
Pinterest

Free Shipping Over $50

Free Shipping Over $50

Home
Shop
Community
Contact

Facebook
X (Twitter)
Instagram
Pinterest

Castle Glassworks

HomeHome
ShopShop
- All products
- Flower
  
  Ash Catchers
  
  Beakers
  
  Bowls
  
  Downstems
  
  Grinders
  
  Rolling Trays
- Concentrates
  
  Bangers
  
  Carb Caps
  
  Dab Rigs
  
  Dab Tools
- Accessories
  
  Ash Catchers
  
  Bangers
  
  Bowls
  
  Carp Caps
  
  Downstems
  
  Grinders
  
  Protective Bags
  
  Rolling Trays
  
  Tools
CommunityCommunity
ContactContact

Search Login Cart

Confirm your age

Are you legal smoking age?

Cart

Your cart is currently empty.

Not sure where to start?
Try these collections:

Continue shopping

Spend $50.00 more to reach free shipping!

Order special instructions

Order note

Estimate shipping

Discount

Discount code

Taxes and shipping calculated at checkout

Subtotal

$0.00 CAD

Recently viewed

Search

Search

We use cookies

This site uses cookies for better user experience and analytics.

Switch Up Your Function

Premium Quality Bong Downstems

A cracked downstem shouldn’t bench your bong. Castle Glassworks stocks precision-made replacements to match your piece. Measure your existing stem (or check our Downstem Fit Guide), and we’ll get you back to smooth filtration fast.

No leaks, borosilicate glass with snug joint seals
Diffusion options, from basic slits to multi-hole percolation
Measured for your bong
Thick glass that won’t snap during use or cleaning

Collections
Bong Downstems

Filter and sort

Sort by

Product type

Downstem(3)

Price

From price To price

From price $

to

To price $

Color

Amber (2)
Black (1)
Blue (3)
Clear (1)
Green (3)
Grey (3)
Pink (3)
Purple (3)
Teal (1)

Sort by:

Best selling Sort by

Featured
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Date, old to new
Date, new to old

Product type

Downstem(3)

Price

From price To price

From price $

to

To price $

Color

Amber (2)
Black (1)
Blue (3)
Clear (1)
Green (3)
Grey (3)
Pink (3)
Purple (3)
Teal (1)

5.0

Save 25%

5.75" 8-Slit Diffused Downstem – Borosilicate Glass Upgrade

Vendor:Castle Glassworks

5.75" 8-Slit Diffused Downstem – Borosilicate Glass Upgrade

Sale price$11.24Regular price $14.99

5.0

Save 25%

5.75" Straight Downstem Replacement – Premium Borosilicate Glass

Vendor:Castle Glassworks

5.75" Straight Downstem Replacement – Premium Borosilicate Glass

Sale price$9.74Regular price $12.99

4.0

Save 25%

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

Vendor:Castle Glassworks

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

Sale price$13.49Regular price $17.99

Replace or Upgrade—Your Call

Need a quick fix? We’ve got stock downstems that fit most bongs. Want better filtration? Try our upgraded diffusion stems for cooler hits. Either way, you’re back in business.

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

5.75" 9-Hole Replacement Downstem – Premium Borosilicate Glass

Sale price$13.49Regular price $17.99

1 total reviews

Color

Color: Green

GreenGreen
BlueBlue
PinkPink
PurplePurple
GreyGrey
AmberAmber
TealTeal

Product variants

Quantity

This item is a deferred, subscription, or recurring purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.

Share:

Share on Facebook
Share on X
Pin on Pinterest
Share by Email

Share

Share on Facebook
Share on X
Pin on Pinterest
Share by Email

Need help?

View full details

Bowls

5.0

Save 25%

14mm Disk Bowl – Borosilicate Glass Bowl Piece

Vendor:Castle Glassworks

14mm Disk Bowl – Borosilicate Glass Bowl Piece

Sale price$14.99Regular price $19.99

4.5

Save 25%

14mm Horn Bowl – Colored Borosilicate Glass Bowl Piece

Vendor:Castle Glassworks

14mm Horn Bowl – Colored Borosilicate Glass Bowl Piece

Sale price$17.24Regular price $22.99

3.3

Save 25%

14mm Round Tab Bowl – Borosilicate Glass Bowl Piece

Vendor:Castle Glassworks

14mm Round Tab Bowl – Borosilicate Glass Bowl Piece

Sale price$13.49Regular price $17.99

5.0

Save 25%

14mm Puck Bowl – Borosilicate Glass Bowl Piece

Vendor:Castle Glassworks

14mm Puck Bowl – Borosilicate Glass Bowl Piece

Sale price$14.99Regular price $19.99

Save 25%

14mm Male Stick Tab Bong Bowl

Vendor:Castle Glassworks

14mm Male Stick Tab Bong Bowl

Sale price$14.99Regular price $19.99

Customer service

Find reliable customer service with us

Fast Free Shipping

Get free shipping on orders of $50 or more

Join Our Influencer Program

Join now and receive commission

Secure payment

Your payment information is processed securely

Quick links

Privacy Policy
Refund Policy
Shipping Policy
Terms of Service

Information

Blog
Careers
Help Center
Wholesale Registration
Influencer Program

+1 709 749 1994

contact@castleglassworks.ca

Stay in the loop by signing up for our newsletter

Enter your email

Facebook
X (Twitter)
Instagram
Pinterest

© 2026 Castle Glassworks. Powered by Shopify

Refund policy
Privacy policy
Terms of service
Shipping policy
Contact information

Language

Country/region

Choosing a selection results in a full page refresh.
Opens in a new window.