Do you know if this will fit the four gallon RotopaX container?? It seems to be larger than the two gallon screws caps.

NOPE. Foe unknown reasons this is 100% incorrect and no explanation as to why. It is too large for the Rotopax. I bet its for their other line and the seller has no clue what hes actually selling

is this for the fuel or water packs? thank You

I ordered it for my fuel tank its a direct replacement

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Description

🛢️ Fuel your adventures with the only container that’s truly road-legal and built to last.

PRECISION SEAL - Screw-in cap guarantees leak-proof, mess-free fuel storage every time.
SLEEK MODERN DESIGN - Painted black finish blends rugged utility with professional style.
UNMATCHED COMPLIANCE - Only EPA & CARB approved fuel container on the market—ride legally and confidently.
COMPACT LIGHTWEIGHT - At just 0.8 oz and 2.9 x 4.3 x 2.2 inches, it’s easy to carry and store without bulk.
TRIPLE LAYER DURABILITY - Patented roto-molding process ensures superior strength and chemical resistance.

The RotopaX Spout Screw Cap is a compact, lightweight, and EPA & CARB compliant fuel container cap featuring a patented three-layer roto-molding process and a secure screw-in closure. Designed for durability and leak-proof performance, it meets stringent US government environmental standards while offering a sleek, modern finish.

Specifications

Brand	RotopaX
Color	Black
Material	Plastic
Exterior Finish	Painted
Item dimensions L x W x H	2.9 x 4.3 x 2.2 inches
Style	Modern
Item Weight	0.05 Pounds
Closure Type	Screw-In
Manufacturer	RotopaX
UPC	685717077905
Model	RotopaX RX-SP-SC
Item Weight	0.8 ounces
Product Dimensions	2.9 x 4.3 x 2.2 inches
Item model number	RX-SP-SC
Is Discontinued By Manufacturer	No
Manufacturer Part Number	RX-SP-SC

Reviews

G**L

Exact OEM Part

Exact OEM replacement cap for Rotopax.

14.05.2025

J**N

Perfect Replacement

Perfect Rotopax replacement cap for the gen 2 water canister.

20.03.2025

E**A

Works great.

Someone tried to siphon the gas out of my Rotopax while I was parked in my driveway. They were startled by my security system, dropped all their crap and ran. Unfortunately, the only thing they took with them was the cap. I ordered this one and it fits perfectly. It feels just as sturdy as the original.

27.11.2019

S**E

Rotopaks cap

Excellent and good quality product

15.06.2024

T**M

This does not fit my RotoPax water container.

Very disappointed that it did not fit. I’m not sure what this is supposed to fit but it’s too big for RotoPax.

12.11.2023

J**J

Works perfect on my 2 gal water pack

This is the exact same cap that originally came with my 2 gallon pack. Fits perfectly.

26.09.2020

C**G

only fits there new cans

I purchased this for an older style can as it was the only one I can find. It is way to large and UPS lost it so I reordered and I now have 2 that do not fit e 2 year old fuel cans

12.07.2024

M**S

Greedy company

Does not fit 2 gallon gas rotopax . No gasket included as well . Smh

7.03.2025