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Item #:
6864
Fluidmaster 400A Anti-Siphon Universal Toilet Tank Fill Valve,Black
85% of respondents would recommend this to a friend
Item #:
6864
XAF 17350
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What Stands Out
Anti-Siphon Design
Prevents backflow and contamination of your home's water supply, ensuring safe and clean water usage with every flush.
Universal Fit
Designed to fit most toilet tanks, the Fluidmaster 400A makes installation easy and hassle-free, accommodating various toilet brands and models.
Durable Construction
Engineered with high-quality materials for long-lasting performance, this fill valve reduces maintenance needs and extends the lifespan of your toilet components.
Product Details
| Brand Name | Fluidmaster |
| Model Number | 100554467 |
| Number of Packs | 1 |
| Global Trade Identification Number | 00039961000026 |
| Unit Count | 1 Count |
| Manufacturer | EZ-FLO |
| Number of Items | 1 |
| Included Components | Fill valve, nut and refill tube |
| Item Type Name | Toilet Tank Fill Valve |
| Item Weight | 8 ounces (226.8 grams) |
| Set Name | Fluidmaster 400CCRP4 Toilet Fill Valve Kit |
| Manufacturer Part Number | 400ARP25 |
| Inlet Connection Type | Fill |
| Outlet Connection Type | Fill |
| Maximum Pressure | 200 psi |
| Number of Ports | 2 |
| Thread Size | 7/8" or 1 1/4" (198.1 cm) |
| Thread Type | Standard/Universal |
| Valve Type | Float Valve |
| Item Dimensions | 12 x 3 x 12.5 inches (30.5 x 7.6 x 31.8 cm) |
| Outlet Connection Size | 12 inches (30.5 cm) |
| Size | 1 Pack |
| Material Type | Plastic |
| Specification Met | NSF, ANSI |
| Material | Plastic |
| Brand | Fluidmaster |
| Item dimensions L x W x H | 12 x 3 x 12.5 inches (30.5 x 7.6 x 31.8 cm) |
| Maximum Operating Pressure | 200 psi |
Who Should Buy?
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DIY Enthusiasts
Perfect for those who prefer to handle plumbing repairs and installations on their own, saving time and money.
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Homeowners
Ideal for homeowners looking to improve toilet efficiency and reduce water consumption significantly.
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Budget-Conscious Users
Great for users needing an affordable yet reliable solution to toilet fill valve issues without spending excessively.
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Professional Plumbers
May not be suitable for professional applications requiring high-end performance and specialized features beyond basic use.
Product Description
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Customer Questions & Answers
-
Question:
What is the Fluidmaster 400A Anti-Siphon Universal Toilet Tank Fill Valve?
Answer: The Fluidmaster 400A is a highly efficient toilet tank fill valve designed to refill your toilet tank after each flush. This model features an anti-siphon design, which prevents backflow, ensuring clean water is maintained. Its universal fit allows compatibility with most toilet brands, making it an ideal solution for various installations and repairs. -
Question:
How does the anti-siphon feature work in the Fluidmaster 400A?
Answer: The anti-siphon feature works by utilizing a special valve design that prevents water from flowing back into your home's freshwater supply. This is crucial for maintaining water quality and safety. By incorporating this feature, the Fluidmaster 400A prevents contamination, making it a reliable choice for any toilet system. -
Question:
Can the Fluidmaster 400A be installed without professional help?
Answer: Yes, many users find that they can install the Fluidmaster 400A on their own. With basic tools, you can easily remove your existing fill valve and replace it with this model by following the provided instructions. The straightforward installation process is beneficial for homeowners looking to undertake DIY plumbing repairs. -
Question:
What are the benefits of using the Fluidmaster 400A compared to other fill valves?
Answer: The Fluidmaster 400A stands out due to its anti-siphon protection, adjustable height for custom fit, and quiet operation. These features ensure that your toilet refills silently and efficiently, while reducing the risk of contamination. Its reliability and durability make it a preferred choice over standard fill valves. -
Question:
Does the Fluidmaster 400A only work with certain toilet brands?
Answer: No, the Fluidmaster 400A is designed as a universal toilet tank fill valve, which means it fits most toilet brands readily. This versatility ensures that regardless of the toilet model you have, you can install the 400A with confidence, making it a practical solution for repairs and upgrades. -
Question:
What signs indicate that I need to replace my toilet fill valve with the Fluidmaster 400A?
Answer: Common indicators that your toilet fill valve may need replacement include constant running water, slow filling of the tank, or unexpected noises. If you experience any of these issues, upgrading to the Fluidmaster 400A can help resolve these problems and enhance the overall performance of your toilet. -
Question:
Is the Fluidmaster 400A suitable for both low-flow and high-flow toilets?
Answer: Absolutely! The Fluidmaster 400A is designed to function efficiently with both low-flow and high-flow toilets. Its adjustable settings allow for optimization based on your specific toilet requirements, helping to conserve water while ensuring adequate tank fill for optimal flushing performance. -
Question:
What tools do I need to install the Fluidmaster 400A?
Answer: To install the Fluidmaster 400A, you will typically need a pair of adjustable pliers, a flathead screwdriver, and a new supply line if necessary. These simple tools will enable you to perform the installation efficiently, making it a manageable project even for those new to plumbing. -
Question:
How can I troubleshoot issues with the Fluidmaster 400A once it’s installed?
Answer: Troubleshooting the Fluidmaster 400A includes checking for any leaks around the connection points, ensuring the water supply is turned on, and adjusting the float to the correct height. If problems persist, it's advisable to refer to the user manual for more detailed guidance or consult resources online for common fixes. -
Question:
Where can I buy the Fluidmaster 400A Anti-Siphon Universal Toilet Tank Fill Valve?
Answer: You can purchase the Fluidmaster 400A Anti-Siphon Universal Toilet Tank Fill Valve at Ubuy. Ubuy offers a reliable platform that ensures the product is available and ready for order, allowing you to enhance your toilet's performance efficiently.
Fluidmaster Toilet Replacement Parts 100554467 Editorial Review
Fluidmaster 400A Anti-Siphon Universal Toilet Tank Fill Valve, Black, offers an effortless installation process, proving to be an excellent choice for both novice and experienced DIYers. Customers have praised its straightforward setup, with clear instructions and included necessary parts, making it a hassle-free experience. This fill valve features an anti-siphon design, ensuring safe water supply management by preventing contamination, while also refilling tanks quickly and quietly. Many users have noted that the Fluidmaster 400A significantly improved toilet performance, eliminating leaks and reducing noise. Overall, it's a highly recommended solution for anyone facing toilet tank issues or looking for a robust fill valve replacement.
Customer Reviews & Ratings
4872 customers ratings
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5 Star
81%
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4 Star
13%
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3 Star
3%
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2 Star
1%
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1 Star
2%
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Pros
- Easy installation for DIY beginners
- Anti-siphon feature enhances safety
- Quick and quiet tank refill
- Improves overall toilet performance
- Universal design fits most tanks
Cons
- Instructions may be slightly complex for first-time users
Platform Trust & Buyer Confidence
JG
Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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Emmanuel
Verified buyer
“I always receive support when I engage customer service. Overall my experience with UBUY has been top notch. Keep up the good work.”
31 August 2026 · via Trustpilot
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fnd
Verified buyer
“The delivery was fast and the product came undamaged and authentic.”
29 August 2026 · via Trustpilot
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Leana
Verified buyer
“Ubuy is extremely efficient and to order online is an easy process. The verity of products to buy is really unlimited! My order was urgent and I got it on time. The products are great! Thank you Ubuy!”
25 August 2026 · via Trustpilot
HL
Hengo
Verified buyer
“Fast, convenient and cheap. Great store!”
27 August 2026 · via Trustpilot
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XAF 17350
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Features & Benefits
- Fluidmaster is the preferred supplier of toilet tank trim since 1957.
- With over 90 countries worldwide, Fluidmaster has manufacturing facilities across the world.
- Fluidmaster's complete line of toilet repair parts includes; fill valves, flush valves, flappers, tank levers, dual flush valves, bowl wax, toilet repair kits, seals, connectors and more.
- The Fluidmaster 400A Anti-Siphon Toilet Tank Fill Valve - FM400A is highly durable.
- The product is manufactured in Mexico.
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