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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🔧 Seal smarter, not harder — the ultimate flexible tank adapter for pros who demand perfection.

COMPACT EFFICIENT - 1" thread size and 44mm saw size ensure a precise, space-saving fit for your tank or pipe.
PROUDLY AMERICAN MADE - Manufactured in the USA, guaranteeing premium quality and reliability you can trust.
EFFORTLESS INSTALLATION - Slip-on design eliminates complex hardware and cuts installation time drastically.
UNMATCHED SEAL INTEGRITY - DuPont Alcryn material creates a liquid-tight seal up to 65 PSI, resisting acids, oils, and temperature extremes.
DURABILITY MEETS VERSATILITY - Withstands pressure, suction, and harsh chemicals for long-lasting performance in any environment.

The Uniseal Warehouse 1" UNISEAL Flexible Tank Adapter (2 Pack) is a precision-engineered polypropylene bulkhead fitting designed for quick, reliable, and leak-proof pipe-to-tank connections. Featuring a 44mm saw size and a robust DuPont Alcryn seal, it withstands up to 65 PSI and harsh chemical exposure, making it ideal for industrial and professional plumbing applications. Made in the USA, it simplifies installation by replacing traditional multi-part fittings with a single injection-molded unit.

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Size	44 month
Material	Plastic
Brand	The Uniseal Warehouse
Colour	Black
Connector Type	tab
Thread Size	1 inch
Item Weight	454 g
Number of Pieces	2
Manufacturer	united states
UPC	637262982548
Item model number	ikjnlk-887
Package Dimensions	15.19 x 10.39 x 2.31 cm; 453.59 g
ASIN	B0723HJ9KX

The Uniseal Warehouse 1" UNISEAL Flexible Tank Adapter (Bulkhead) - 2 Pack

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