Best Fluidmaster 400 Model of 2025

Last updated on 15/12/2025
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1
Fluidmaster 400A Toilet Tank Repair Fill Valve - 2 Pack
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Fluidmaster 400A Toilet Tank Repair Fill Valve - 2 Pack

Fluidmaster
Why we love it
  • Saves water and signals leaks.
  • Adjustable from 9-14.5 inches.
  • Includes 2 fill valves.
Main Highlights
  • Easy-to-install
  • EZ twist height adjusts from 9 to 14 in to fit most tanks.
  • Set of 2
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9.7
Exceptional
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9.7
Exceptional
Fluidmaster

Fluidmaster 400A Toilet Tank Repair Fill Valve - 2 Pack

Why we love it
  • Saves water and signals leaks.
  • Adjustable from 9-14.5 inches.
  • Includes 2 fill valves.
Main Highlights
  • Easy-to-install
  • EZ twist height adjusts from 9 to 14 in to fit most tanks.
  • Set of 2
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Value for Money
2
Fluidmaster 400UK Toilet Fill Valve Bottom Entry Twin Pack

Fluidmaster 400UK Toilet Fill Valve Bottom Entry Twin Pack

Fluidmaster
Why we love it
  • Fully height adjustable feature.
  • Quiet refill operation.
  • Perfect height range.
Main Highlights
  • Fully height adjustable
  • Bottom entry
  • Quiet refill
  • Height adjusts 9″-14″ (230mm – 355mm)
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9.5
Superb
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9.5
Superb
Fluidmaster

Fluidmaster 400UK Toilet Fill Valve Bottom Entry Twin Pack

Why we love it
  • Fully height adjustable feature.
  • Quiet refill operation.
  • Perfect height range.
Main Highlights
  • Fully height adjustable
  • Bottom entry
  • Quiet refill
  • Height adjusts 9″-14″ (230mm – 355mm)
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3
Fluidmaster 400EL – FLOAT VALVE, Neutral
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Fluidmaster 400EL – FLOAT VALVE, Neutral

Fluidmaster
Free Shipping
Why we love it
  • Reduces staining to clean water.
  • Adjustable float for water volume.
  • Telescopic tube for precise regulation.
Main Highlights
  • ✅ UNIVERSAL COMPATIBILITY The 400EL fill valve is designed to fit most standard toilet systems, ensuring compatibility with a wide range of toilet models. Its adjustable height ensures a seamless fit, making it an ideal replacement valve for your existing system.
  • ✅ Adjustable Water Level The 400EL fill valve features an adjustable float that allows you to control the water level in the tank, optimizing flushing efficiency and helping to conserve water. This feature reduces unnecessary water usage and lowers your water bill over time.
  • ✅ Leak-Proof Operation Featuring a leak-proof design, the 400EL fill valve prevents water wastage by ensuring that no water escapes through faulty seals or valves. Its sturdy construction ensures reliable performance and eliminates the risk of leaks.
  • ✅ Noise-Free Operation Engineered with sound-reducing technology, the 400EL fill valve significantly reduces water tank fill-up noise. This creates a quiet and peaceful environment every time the tank refills, making it a perfect option for households or commercial facilities where noise is a concern.
  • ✅ Easy Installation The 400EL fill valve is designed for easy installation, whether you are replacing an old valve or installing it in a new toilet system. With its bottom-entry design, it connects quickly and securely, ensuring a hassle-free setup process.
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9.4
Superb
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9.4
Superb
Fluidmaster

Fluidmaster 400EL – FLOAT VALVE, Neutral

Free Shipping
Why we love it
  • Reduces staining to clean water.
  • Adjustable float for water volume.
  • Telescopic tube for precise regulation.
Main Highlights
  • ✅ UNIVERSAL COMPATIBILITY The 400EL fill valve is designed to fit most standard toilet systems, ensuring compatibility with a wide range of toilet models. Its adjustable height ensures a seamless fit, making it an ideal replacement valve for your existing system.
  • ✅ Adjustable Water Level The 400EL fill valve features an adjustable float that allows you to control the water level in the tank, optimizing flushing efficiency and helping to conserve water. This feature reduces unnecessary water usage and lowers your water bill over time.
  • ✅ Leak-Proof Operation Featuring a leak-proof design, the 400EL fill valve prevents water wastage by ensuring that no water escapes through faulty seals or valves. Its sturdy construction ensures reliable performance and eliminates the risk of leaks.
  • ✅ Noise-Free Operation Engineered with sound-reducing technology, the 400EL fill valve significantly reduces water tank fill-up noise. This creates a quiet and peaceful environment every time the tank refills, making it a perfect option for households or commercial facilities where noise is a concern.
  • ✅ Easy Installation The 400EL fill valve is designed for easy installation, whether you are replacing an old valve or installing it in a new toilet system. With its bottom-entry design, it connects quickly and securely, ensuring a hassle-free setup process.
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4
Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve with Tank and Bowl Water Control 2-Pack, Blue
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Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve with Tank and Bowl Water Control 2-Pack, Blue

Fluidmaster
Free Shipping
Why we love it
  • Whisper-quiet operation enhances comfort.
  • Simple installation with clear instructions.
  • Customizable adjustments for perfect flush.
Main Highlights
  • Fix noisy, or slow filling fill valves with the quietest, most powerful toilet fill valve 2-pack available
  • Easy to install, step-by-step instructions included
  • Universal fit for most toilet models and brands
  • Tank and Bowl water level adjustment dials to customize the perfect flush and save
  • 2X greater bowl refill for a more powerful flush than standard designs; EZ-Twist height adjusts from 9 in. to 14 in. to fit more tanks; 7 year warranty
Show More
9.3
Superb
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9.3
Superb
Fluidmaster

Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve with Tank and Bowl Water Control 2-Pack, Blue

Free Shipping
Why we love it
  • Whisper-quiet operation enhances comfort.
  • Simple installation with clear instructions.
  • Customizable adjustments for perfect flush.
Main Highlights
  • Fix noisy, or slow filling fill valves with the quietest, most powerful toilet fill valve 2-pack available
  • Easy to install, step-by-step instructions included
  • Universal fit for most toilet models and brands
  • Tank and Bowl water level adjustment dials to customize the perfect flush and save
  • 2X greater bowl refill for a more powerful flush than standard designs; EZ-Twist height adjusts from 9 in. to 14 in. to fit more tanks; 7 year warranty
Show More
5
Fluidmaster K-400H-021-P8 PerforMAX 2-Inch Everything Toilet Repair Kit, Multicolor
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Fluidmaster K-400H-021-P8 PerforMAX 2-Inch Everything Toilet Repair Kit, Multicolor

Fluidmaster
Free Shipping
Main Highlights
  • The Everything Kit includes everything you need to fix your toilet in one trip and one purchase
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9.2
Superb
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9.2
Superb
Fluidmaster

Fluidmaster K-400H-021-P8 PerforMAX 2-Inch Everything Toilet Repair Kit, Multicolor

Free Shipping
Main Highlights
  • The Everything Kit includes everything you need to fix your toilet in one trip and one purchase
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6
Fluidmaster PROCP002 - Fully Height Adjustable & Flush Valve with Chrome Botton - Universal Cistern Pack - Fixings Included
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Fluidmaster PROCP002 - Fully Height Adjustable & Flush Valve with Chrome Botton - Universal Cistern Pack - Fixings Included

Fluidmaster
13% OffFree Shipping
Why we love it
  • Saves water effectively.
  • Includes all fixings.
  • Works with all cisterns.
Main Highlights
  • Cable Length 350mm.
  • Water Saving Dual Flush Valve Easy to adjust full and half flush.
  • Suitable for all pressure cisterns
  • Includes all required fixings.
  • Stainless steel through bolt set
Show More
9.1
Superb
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9.1
Superb
Fluidmaster

Fluidmaster PROCP002 - Fully Height Adjustable & Flush Valve with Chrome Botton - Universal Cistern Pack - Fixings Included

13% OffFree Shipping
Why we love it
  • Saves water effectively.
  • Includes all fixings.
  • Works with all cisterns.
Main Highlights
  • Cable Length 350mm.
  • Water Saving Dual Flush Valve Easy to adjust full and half flush.
  • Suitable for all pressure cisterns
  • Includes all required fixings.
  • Stainless steel through bolt set
Show More
7
Fluidmaster 400AKR Universal All in One Toilet Repair Kit for 2-Inch Flush Valves, Easy Install
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Fluidmaster 400AKR Universal All in One Toilet Repair Kit for 2-Inch Flush Valves, Easy Install

Fluidmaster
Free Shipping
Why we love it
  • Restores toilet performance efficiently.
  • Universal design for compatibility.
  • Easy installation in minutes.
Main Highlights
  • RESTORES OVERALL TOILET PERFORMANCE: All in one toilet repair kit replaces inefficient fill and flush valves, leaky flappers, and broken toilet handles to make your toilet run like new.
  • UNIVERSAL DESIGN: 400A toilet fill valve adjusts easily from 9 – 14 inches, fits most 2-inch flush valve toilets, and is ideal for use in 1.6 to 3.5 gallons per flush toilets or larger
  • HIGH PERFORMANCE FLAPPER: PerforMAX high performance 2-inch adjustable water-saving toilet flapper maximizes water usage with each flush
  • EASY INSTALLATION: Easily installs in 10 minutes or less to get your toilet flushing like new again
Show More
9.1
Superb
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9.1
Superb
Fluidmaster

Fluidmaster 400AKR Universal All in One Toilet Repair Kit for 2-Inch Flush Valves, Easy Install

Free Shipping
Why we love it
  • Restores toilet performance efficiently.
  • Universal design for compatibility.
  • Easy installation in minutes.
Main Highlights
  • RESTORES OVERALL TOILET PERFORMANCE: All in one toilet repair kit replaces inefficient fill and flush valves, leaky flappers, and broken toilet handles to make your toilet run like new.
  • UNIVERSAL DESIGN: 400A toilet fill valve adjusts easily from 9 – 14 inches, fits most 2-inch flush valve toilets, and is ideal for use in 1.6 to 3.5 gallons per flush toilets or larger
  • HIGH PERFORMANCE FLAPPER: PerforMAX high performance 2-inch adjustable water-saving toilet flapper maximizes water usage with each flush
  • EASY INSTALLATION: Easily installs in 10 minutes or less to get your toilet flushing like new again
Show More
8
FLUIDMASTER ANTI-SIPHON FILL VALVE 400ACN3P5
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FLUIDMASTER ANTI-SIPHON FILL VALVE 400ACN3P5

Fluidmaster
Main Highlights
  • TOILET FILLVALV 400A 3PK
Show More
9.0
Superb
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9.0
Superb
Fluidmaster

FLUIDMASTER ANTI-SIPHON FILL VALVE 400ACN3P5

Main Highlights
  • TOILET FILLVALV 400A 3PK
Show More
9
Fluidmaster PRO45B Fill Valve with Brass Shank - Black
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Fluidmaster PRO45B Fill Valve with Brass Shank - Black

Fluidmaster
25% OffFree Shipping
Why we love it
  • Fits all brands.
  • Heavy-duty brass shank.
  • Ultra-quiet operation.
Main Highlights
  • Fits all brands
  • Heavy-duty brass shank for added durability
  • Ultra-quiet operation
  • Preferred by professional plumbers
  • 5-Year assurance
Show More
8.8
Excellent
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8.8
Excellent
Fluidmaster

Fluidmaster PRO45B Fill Valve with Brass Shank - Black

25% OffFree Shipping
Why we love it
  • Fits all brands.
  • Heavy-duty brass shank.
  • Ultra-quiet operation.
Main Highlights
  • Fits all brands
  • Heavy-duty brass shank for added durability
  • Ultra-quiet operation
  • Preferred by professional plumbers
  • 5-Year assurance
Show More
10
Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, Multicolor, 1-Pack
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Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, Multicolor, 1-Pack

Fluidmaster
Free Shipping
Why we love it
  • Quiet and powerful performance.
  • Easy to install.
  • Fits most toilet models.
Main Highlights
  • Fix noisy, or slow filling fill valves with the quietest, most powerful toilet fill valve available
  • Easy to install, step-by-step instructions included
  • Universal fit for most toilet models and brands
  • Tank and Bowl water level adjustment dials to customize the perfect flush and save
  • International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
Show More
8.7
Excellent
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8.7
Excellent
Fluidmaster

Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, Multicolor, 1-Pack

Free Shipping
Why we love it
  • Quiet and powerful performance.
  • Easy to install.
  • Fits most toilet models.
Main Highlights
  • Fix noisy, or slow filling fill valves with the quietest, most powerful toilet fill valve available
  • Easy to install, step-by-step instructions included
  • Universal fit for most toilet models and brands
  • Tank and Bowl water level adjustment dials to customize the perfect flush and save
  • International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
Show More

We scanned 537 products

We reviewed these offers relevant to the Fluidmaster 400 Model within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Fluidmaster, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best Fluidmaster 400 Model in the market, we considered we took a deep dive into 2686 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

  • The clear winner of our analysis is Fluidmaster 400A Toilet Tank Repair Fill Valve - 2 Pack. We love many things about this product by Fluidmaster. What sets it apart from the competition is Saves water and signals leaks, Adjustable from 9-14.5 inches, Includes 2 fill valves.
  • The best value product for most shoppers and where user satisfaction is continuously the highest is Fluidmaster 400UK Toilet Fill Valve Bottom Entry Twin Pack by Fluidmaster based on online reviews by bloggers, experts and online shoppers.
  • The biggest bargain at the moment for Fluidmaster 400 Model and the best cost-to-value ratio is Fluidmaster PRO45B Fill Valve with Brass Shank - Blackat Fluidmaster with a 25% discount.
  • Our list of the best Fluidmaster 400 Model is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.