The store will not work correctly in the case when cookies are disabled.
Bulk Reef Supply Saltwater Logo
Bulk Reef Supply Freshwater Logo

FREE Shipping Over $49

Free Shipping

Orders Over $49 Ship Free

$5.99 economy shipping on orders under $49

Learn More
| Earn Reward Points
Skip to Content
Menu BRS Freshwater
My Cart
    • My Account
    • My Wish List
    • My Orders
    • Address Book
    • Sign Out
    • Reward Points
  • Sign In
Bulk Reef Supply Mobile Menu
Close

Quick Links

  • Deals
  • Gift Cards
  • What's New
  • Education
  • Clearance
  • Open Box
  • PR Rewards
  • Shop Brands
  • FAQs
  • Saltwater
Menu
Fast Shipping Fast Shipping
Sign up to be a Reward Member Earn Reward Points
Returns 365-Day Returns
Experts Aquarium Experts
  • Fast Shipping Fast Shipping
  • Sign up to be a Reward Member Earn Reward Points
  • Returns Risk-Free 365 Day Returns
  • Experts Aquarium Experts
Loading...
Bulk Reef Supply

Uniseal Bulkheads

Be the first to review this product
Grouped product items
1 1/4” Uniseal

SKU: 400600

In stock

$2.99 $2.99

- +
2” Uniseal

SKU: 202904

In stock

$3.99 $3.99

- +
Add to Wish List
Risk Free 365 Returns

Your Satisfaction Guaranteed With
365 Day Risk Free Returns

No longer need what you ordered? Ordered one too many? We've got your back.


Return new, unopened products in original packaging within 365 days for a full refund.

Under 60 days? No problem. We’ll issue your refund to the original form of payment. Over 60 days? Still no problem. We'll issue your refund in the form of store credit, which you can use like cash on our website.


Return unused, open box products within 30 days.

Open box but still unused? We can help. We’ll issue your refund to the original form of payment minus a small 10% restocking and handling fee.

Some exclusions apply, for more information go to Return & Replacement Details.

Skip to the end of the images gallery
main product photo
Skip to the beginning of the images gallery
Details

Why does BRS recommend this?

Uniseals are one of the secrets in life you wish you knew about years ago.  By conforming to round surfaces they allow you to plumb directly into 5 gallon buckets, brute trash cans, or any round surface.  They accept standard Sch. 40 or Sch. 80 PVC and allow DIY projects that once may have been very costly to complete much more affordable.

Uniseals are used to attach pipe to just about any container in situation where bulkheads will not work. The most common use is on curved surfaces such as storage drums, buckets or even other pipe.

 

Uniseal Specs:

½” Uniseal

  • Fits our Schedule 80 ½” pipe
  • Pipe ID – ½"
  • Hole saw size: 1 ¼” or 31.7mm (32mm)

 

¾” Uniseal

  • Fits our schedule 80 ¾” pipe
  • Pipe ID – ¾”
  • Holesaw size: 1 ¼” or 31.7mm (32mm)

 

1” Uniseal

  • Fits our schedule 80 1" pipe
  • Pipe ID - 1"
  • Holesaw size: 1 ¾” or 44mm

 

1¼” Uniseal

  • Fits our schedule 80 1¼” pipe
  • Pipe ID - 1¼”
  • Hole saw size: 2” or 50.8mm

 

1½” Uniseal

  • Fits our schedule 80 1½” pipe
  • Pipe ID - 1 ½”
  • Hole saw size: 2½” or 64mm

 

2” Uniseal

  • Fits our schedule 80 2" pipe
  • Pipe ID - 2"
  • Holesaw size: 3" or 76mm

 

3” Uniseal

  • Pipe ID - 3"
  • Holesaw size: 4" or 102mm

 

4” Uniseal

  • Pipe ID - 4"
  • Holesaw size: 5" or 127mm

 

6” Uniseal

  • Pipe ID - 6"
  • Holesaw size: 7" or 177.8mm

 

Uniseal Installation Instructions

More Information
More Information
SKU Uniseal
Aquarium Type Saltwater, Freshwater
PVC Connection Type Slip
Reviews 70
Write Your Own Review
You're reviewing:Uniseal Bulkheads
Your Rating
Product Questions

Product Questions

I’m assuming that the hole you drill for a 2” uniseal is a 2” hole?
Question by: Joel Holliday on Dec 21, 2024, 3:00 PM
You drill a Holesaw size: 3" or 76mm. There is a chart on the product page if needed.
Answer by: Matt Lucero (BRS Staff) on Jan 2, 2025, 8:04 AM
Witch uniseal will go into a schedule 40 1" pvc pipe. I am building the inline heater from he king of diy's YouTube channel.
Question by: Bryce Coats on Jun 8, 2017, 12:11 PM
Our fittings are based on the nominal pvc rating, so for 1" ID pvc pipe, you'll want to select the 1" uniseal.

Have a great day!
Answer by: Zack on Jun 13, 2017, 9:54 PM
If I were making a prob holder for my sump would a probe fit into the 1/2" uniseal?
Question by: John Hendrickson on May 20, 2017, 1:47 PM
Hey there,
I'm afraid the probes are a bit too small and would not be able to seal with a 1/2" Uniseal.

Regards
Answer by: Zack on May 22, 2017, 5:09 PM
Are the prices listed, per uniseal? Or do these come in a package? If so, how many?
Question by: Larry C on Aug 16, 2016, 3:02 PM
Great question! The price is per each individual uniseal. :-) Thanks!
Answer by: Randy on Aug 16, 2016, 6:14 PM
If the OD of a 3/4" pvc is slightly over 1", you still use a 3/4" uniseal? I shouldn't bump up to a 1"?? Thanks for any info.
Question by: brian matthews on Jul 27, 2016, 7:41 AM
Hi there,
When it comes to PVC the best thing to do is take your tape measure and throw it away. PVC is nominal sizing and just because it says its ¾” you most likely will not find an exact ¾” dimension anywhere on the pipe. If your PVC is ¾” you will want to use a ¾” Uniseal, along with all other fittings and valves.
Answer by: Charlie on Jul 27, 2016, 8:45 AM
How thick can the wall material be? Can it be used on two walls like attaching an external overflow (similar to a ghost overflow)?
Question by: Aharon on Feb 10, 2016, 9:26 AM
Great question!
We do not recommend using a uniseal on anything wider than 1/4-5/16". Feel free to let us know if you have any further questions!
Answer by: Connor on Feb 10, 2016, 12:23 PM
I am planning to use uniseals for my ATO, mixing, and water change tanks. What can I use for lubrication on the pipe that won't contaminate the water?
Question by: David on Aug 13, 2014, 5:32 AM
Hi David,

In the past I have actually just used water or saliva but many people recommend things like silicone o-ring lubricant, non-ammonia windex and vegetable oil. Just give the container a good rinse after everything is installed and you should be good to go!
https://www.bulkreefsupply.com/dow-111-o-ring-lubricant.html

Hope this helps!
Have a great day :)
Answer by: Bulk Reef Supply on Aug 13, 2014, 5:32 AM
Will they work with schedule 40 pipe?
If so, what diameter pipe for a 1 inch uniseal
Question by: chris on Aug 3, 2014, 9:03 AM
Hi Chris,
Yes. All plumbing is sized with nominal plumbing sizes which takes into account the correct size fittings for the pipe regardless of whether they are sch40, 80, etc. For a 1" pipe you would want a 1" uniseal.
Answer by: Bulk Reef Supply on Aug 3, 2014, 9:03 AM
Can a uni seal be reused? i need to pull the pipe out and install a longer one.
Thanks.
Jack
Destin, Fl.
Question by: Jack on Mar 17, 2014, 11:42 AM
Hi Jack,
That is just fine. Just be careful removing it to not rip or tear on the uniseal and you will be just fine.
Answer by: Bulk Reef Supply on Mar 17, 2014, 11:42 AM
Will it work with tubings?
Question by: Paul on Feb 27, 2014, 3:28 PM
Hi Paul,
The uniseals are made to work with pipe. The diameter of the pipe pushes out and is what seals against the walls of the uniseal. A flexible tube would most likely leak.
Answer by: Bulk Reef Supply on Feb 27, 2014, 3:28 PM

SIGN UP FOR THE BULK REEF SUPPLY NEWSLETTER

Don’t be the last to know this holiday season about sales, specials, new products, and more!

Sign Up Now
BRS Fresh https://media2.cdn.bulkreefsupply.com/media/logo/stores/1/BRS-Logo-498x174.png https://fresh.bulkreefsupply.com/
BRS Fresh Bulk Reef Supply
  • Facebook Opens a new window
  • Youtube Opens a new window
  • Instagram Opens a new window
  • TikTok Opens a new window

Contact

  • 763-432-9691

  • 8am - 6pm CT M-Th
    9am - 4pm CT Friday
  • support@bulkreefsupply.com
  • 6325 Sandburg Road, Suite 200
    Golden Valley, MN 55427 US

Bulk Reef Supply
About Us
Customer Service
Careers
Wholesale Customers
Instructions
Terms & Conditions
Customer Center
Preferred Reefer Program
International Shipping
Returns & Replacements
Payment, Pricing & Promos
Shipping & Delivery
APL Star Logo
© 2025 Aperture Pet & Life. All Rights Reserved.
Privacy Policy

item(s) Added to Your Cart

Product Name

View Cart Checkout Now
You may also like
Bio-Stratum Planted Aquarium Substrate
Fluval
Bio-Stratum Planted Aquarium Substrate
From: $19.99

Choose Options
River Rock/Sea of Green Aquarium Backgrounds
SeaView
River Rock/Sea of Green Aquarium Backgrounds
From: $2.10

Choose Options
Alder Cones 25ct
Liquid Gardens
Alder Cones 25ct
$8.50 $8.50

White Elephant Skin Stone
Ultum Nature Systems
White Elephant Skin Stone
Rating:
100%
1 Review
From: $20.00

Choose Options
Lotus Pods 3ct
Liquid Gardens
Lotus Pods 3ct
$12.00 $12.00

Freshwater Master Test Kit
API
Freshwater Master Test Kit
$35.98 $35.98

Iwagumi Substrate - Gunsmoke Gravel (7.7lbs)
Aqua Natural
Iwagumi Substrate - Gunsmoke Gravel (7.7lbs)
$22.48 $22.48

Gold Pearl Bio-Substrate (5lbs)
Aqua Natural
Gold Pearl Bio-Substrate (5lbs)
$12.99 $12.99

Eco-Complete African Cichlid Zack Black Substrate 20lbs
CaribSea
Eco-Complete African Cichlid Zack Black Substrate 20lbs
$19.23 $22.62

African Cichlid Mix - Original Substrate 20lbs
CaribSea
African Cichlid Mix - Original Substrate 20lbs
$13.35 $15.70

Login and Registration Form

  • Login
  • Register

Registered Customers
If you have an account, sign in with your email address.
Forgot Your Password?
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple

Personal Information
Sign-in Information
Password Strength: No Password
Back
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple
  • Forgot Your Password?

Please enter your email address below to receive a password reset link.
Go back