Can I use them on a round surface like the side of a 5 gallon bucket?

Yes, I believe they were made for that very thing! I used mine on the cover of a 5 gallon bucket. It's a tight fit, but works very well.

Will a 1 inch OD work?

No, your pipe OD must be 1.315'' (33mm) just like 1 inch pvc pipe.

How many pcs for 1 order?

You will receive two Uniseals. (2 pack)

Are these seals NSF certified?

There is nothing that would indicate a NSF rating on the packaging or product. My answer is NO.

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UNISEAL 1 Flexible Tank Adapter (Bulkhead) - 2 Pack

UNISEAL 1 Flexible Tank Adapter (Bulkhead) - 2 Pack

Product ID: 547056948

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Details

Material
Plastic
Brand
The Uniseal
Colour
Black
Connector type
Flange
Thread size
1.75 inch
Exterior finish
Brass

📏1'' Pipe ID precision fit

🛠️1.75'' Holesaw size for easy installation

🇺🇸Made in the USA quality assurance

Description

🔧 Seal smarter, not harder — the last tank adapter you'll ever need!

PROUDLY MADE IN THE USA - Crafted with precision and quality control, supporting local manufacturing and superior product standards.
UNIVERSAL COMPATIBILITY - Fits pipes with 1'' ID and walls up to 3/8'' thick, perfect for diverse industrial and DIY applications.
STREAMLINED INSTALLATION - Single-piece injection molded design replaces complex hardware—cut, insert, and push for a flawless seal in minutes.
EFFORTLESS LEAK PROOF SEAL - Innovative Du Pont Alcryn material ensures a liquid-tight fit up to 65 PSI, eliminating leaks and costly downtime.
DURABLE CHEMICAL RESISTANCE - Withstands acids, oils, gasoline, sewage, and extreme temperatures—built tough for professional-grade reliability.

The UNISEAL 1 Flexible Tank Adapter is a high-performance, single-piece bulkhead seal designed for 1'' pipes with up to 3/8'' wall thickness. Made in the USA, it features a unique Du Pont Alcryn material that creates a liquid-tight seal up to 65 PSI, resisting chemicals, heat, and cold. Its simple installation process replaces traditional multi-part fittings, saving time and reducing labor costs for professionals and DIYers alike.

Specifications

Manufacturer	Drums, Totes & Accessories
Part Number	ikjnlk-887
Package Dimensions	15.19 x 10.39 x 2.31 cm; 453.59 g
Item model number	ikjnlk-887
Colour	Black
Material	Plastic
Number of Pieces	2
Batteries included?	No
Batteries Required?	No
Item Weight	454 g

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