10 Best Water Tank Float Valve in The UK

Last updated on 11/08/2025
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Best Choice
1
9.8
Exceptional
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Adjustable 1/2" Part 2 Ball-Cock Float Valve with Ball for Toilet Cisterns & Water Tanks, Premium BS1212 Standard Ball Valve (2 Pack)
Excel Home
Adjustable 1/2" Part 2 Ball-Cock Float Valve with Ball for Toilet Cisterns & Water Tanks, Premium BS1212 Standard Ball Valve (2 Pack)
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Why We Love It
  • Reliable and durable construction.
  • Adjustable for precise water control.
  • Easy installation and maintenance.
Main Highlights
  • Adjustable 1/2" Part 2 ball-cock float valve, ideal for toilet cisterns, water tanks, and troughs.
  • Premium quality valve manufactured to meet strict BS1212 standards for reliability and durability.
  • Adjustable arm for precise water level control to suit different installation needs and applications.
  • Durable plastic construction resists corrosion, making it ideal for long-term use in water systems.
  • Includes ball/float to ensure consistent operation and efficient water flow control.
  • Easy to install and maintain, perfect for plumbers, DIY repairs, or new water system installations.
9.8
Exceptional
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Best Value
2
9.6
Superb
Save 5%
3 Pack Reliable Water Float Ball Valve Shut off 1/2 Inch Automatic Fill Feed Humidifier Water Tank, Water Ball Valve, Pond Float Replacement Valve
Tatuo
3 Pack Reliable Water Float Ball Valve Shut off 1/2 Inch Automatic Fill Feed Humidifier Water Tank, Water Ball Valve, Pond Float Replacement Valve
5% OffFree Shipping
Why We Love It
  • Upgraded technology for enhanced efficiency.
  • Excellent pressure resistance and sealing.
  • Versatile installation for any angle.
Main Highlights
  • Fit 1/2 inch supply tube: the automatic floating ball valve is an upgrade product, based on the design of new technology and overcoming many defects of traditional straight sealing valve
  • Good sealing effect and higher pressure resistance: with a smaller water level float ball, the float fill valve can withstand higher liquid pressure (= 1 MPA.)
  • Easy installation and flexible adjustment: these float check valve can be installed at any angle with the adjustable arm; Tank mount with extended threads on inlet side of valve for mounting through tank wall
  • Reliable and durable: mini tank float valve is made of special engineering plastics, corrosion resistance, more reliable than traditional metal products
  • Wide applications: the floating shut off valve is widely applied in reverse osmosis system, ponds, fish aquarium, etc.; Also for watering chickens and other small livestock and pets
9.6
Superb
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3
9.5
Superb
sourcing map Water Float Valve G3/4 DN20 Automatic Float Ball Valve Sensor for Water Tank Pump 304 Stainless Steel
sourcing map
sourcing map Water Float Valve G3/4 DN20 Automatic Float Ball Valve Sensor for Water Tank Pump 304 Stainless Steel
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Why We Love It
  • Durable brass and stainless steel.
  • Ensures strong leak prevention.
  • Perfect for various applications.
Main Highlights
  • Thread Size: G3/4inch DN20 Thread Length: 17mm/0.67inch Ball Diameter: 110mm/4.33inch
  • Valve Material: Brass; Ball Material: 304 Stainless Steel, does not produce toxic substances
  • Structure: Float valves use a rod and float ball attached to a valve shutoff lever to control
  • Strong Tightness: Design with a rubber gasket for better sealing and makes sure no leaking.
  • Application: Widely used in water boiler machine, rice steaming machine, water tank, water tower, toilet cisterns, etc.
9.5
Superb
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4
9.4
Superb
Save 5%
PlumbEZ Adjustable 1/2" Inch Part 2 Ball-Cock Float Valve with Ball/Float for Toilet Cistern and Water Tank, Premium Ball Valve Ballcock for Cisterns & Water Tank Trough Manufactured to BS1212
PlumbEZ
PlumbEZ Adjustable 1/2" Inch Part 2 Ball-Cock Float Valve with Ball/Float for Toilet Cistern and Water Tank, Premium Ball Valve Ballcock for Cisterns & Water Tank Trough Manufactured to BS1212
5% OffFree Shipping
Why We Love It
  • Adjustable and reliable.
  • Premium quality build.
  • BS1212 compliant.
Main Highlights
  • Adjustable Ballcock for Water Tank: Our product is an adjustable ballcock for water tank, perfect for maintaining the water level in your tank. It offers a reliable, efficient, and cost-effective solution for managing your water supply.
  • Caravan Water Barrel Float Valve: This product includes a caravan water barrel float valve, ideal for regulating the water flow in your caravan's water barrel. Its adjustable feature allows you to control the water level as per your needs.
  • Ball Valve for Toilet Cistern: Incorporating a ball valve for toilet cistern, this product ensures a smooth and effective operation. It's designed to replace your toilet's existing ball valve assuming its part 2.
  • Automatic Stopcock: Our product features an automatic stop, facilitating to control the amount of water flow in your plumbing system. It's an integral part of the product, designed to offer an optimal control over your water supply.
  • Cold Water Tank Ball Valve: The cold water tank ball valve included in our product is adjustable, providing a superior control over your cold water tank's water level. It's designed for easy installation and maintenance, making it a practical choice for your water supply needs.
9.4
Superb
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5
9.2
Superb
1/2" Part 1 Ball-Cock Valve with Ball/Float
Kebonds
1/2" Part 1 Ball-Cock Valve with Ball/Float
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Why We Love It
  • Compelling characters and plot.
  • Captivating romantic elements.
  • Enchanting magical themes.
Main Highlights
  • Artikelname three sisters island trilogy collection 3 books set by nora roberts dance upon the air, heaven and earth, face the fire
  • Ottone bs1212 parte 1 ballcock
  • Brass bs1212 part 1 ball valve
9.2
Superb
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6
9.1
Superb
1/2'' Automatic Float Valve Water Level Control for Livestock Drinking Water Tank Toilet Swimming Pool Aquarium Automatic Irrigation (Side Inlet)
hisunfarm
1/2'' Automatic Float Valve Water Level Control for Livestock Drinking Water Tank Toilet Swimming Pool Aquarium Automatic Irrigation (Side Inlet)
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Why We Love It
  • Fully automatic control feature.
  • Eco-friendly and durable.
  • Wide range of applications.
Main Highlights
  • Automatic Control: The upgraded water level control valve is fully automatic control and no charging required.
  • More stable and sensitive: Small size but high flow rate, more water output than conventional floats.
  • Eco-friendly and Durable: The valve is made of food-grade plastic for drinking water pipes and 304 stainless steel screws, anti-rust, corrosion resistant, and longer life used
  • Perfect Replacement: The valve replaces the traditional float valve and also easy to install, built-in installation, low failure rate, and save water resources.
  • Wide Applications: Can be used for water tanks, water towers, swimming pools, toilets, animal drinking water, humidifiers, civil buildings, etc..
9.1
Superb
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7
8.9
Excellent
Svauoumu 2Pcs Float Valve Ballcock Valve for Water Tank Ballcock Water with Adjustable Arm Float Ball Valve Shut Off Automatic 3/4" NPT Water Troughs Livestock
Svauoumu
Svauoumu 2Pcs Float Valve Ballcock Valve for Water Tank Ballcock Water with Adjustable Arm Float Ball Valve Shut Off Automatic 3/4" NPT Water Troughs Livestock
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Why We Love It
  • High-Quality ABS material.
  • Easy threaded connection.
  • Wide range of uses.
Main Highlights
  • Durable material: The ballcock valve for water tank ​is made of high-quality ABS, which is strong and durable, does not rust, does not deform, is clean and hygienic, and has corrosion resistance
  • Installation size: side-mounted 22 cm (not including the length of the water inlet pipe wire mouth)
  • Unique design: The floating principle is adopted to control the water inlet and outlet switches to achieve a constant water level effect. There is a filter inside the float valve to keep the water volume and quality clean
  • Easy to use: 3/4 inch NPT external thread entrance, threaded internal thread connection, easy to operate
  • Wide range of uses: suitable for humidifiers, sinks, water purifiers, aquariums, fountains, air coolers, water tanks, ponds, horse/cattle/sheep drinking fountains, etc
8.9
Excellent
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8
8.7
Excellent
1/2" Part 2 High Pressure Brass ball Valve
Centurion
1/2" Part 2 High Pressure Brass ball Valve
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Why We Love It
  • High-pressure usage suitability.
  • Central heating option.
  • Adjustable brass arm.
Main Highlights
  • Brass 1/2" BSP Part 2 ballvalve with adjustable brass arm
  • BS1212 Part 2 in brass
  • Ideal for central heating header and supply tanks
  • Suitable for mains high pressure only
  • Excludes poly float (available separately)
8.7
Excellent
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9
8.7
Excellent
Automatic Float Valve for Water Tanks, 3/4" Side Inlet | Adjustable Water Level Control Valve for Fish Ponds, Pools, Livestock Troughs, and Irrigation Systems
YGboost
Automatic Float Valve for Water Tanks, 3/4" Side Inlet | Adjustable Water Level Control Valve for Fish Ponds, Pools, Livestock Troughs, and Irrigation Systems
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Why We Love It
  • Automatic operation saves time.
  • Durable, safe for drinking water.
  • Compact design fits tight spaces.
Main Highlights
  • Automatic Water Level Control: Maintain your desired water level without electricity or manual effort. The float valve opens and closes automatically with water level changes, providing reliable and consistent flow regulation for hands-free operation.
  • Premium-Grade Plastic Construction: Made from durable, non-toxic, corrosion-resistant plastic that’s safe for drinking water and built to withstand long-term exposure to outdoor or humid environments—without rusting or degrading like metal valves.
  • Space-Saving & Efficient Design: This compact float valve is smaller than bulky traditional ball valves, making it ideal for use in tight installations. Despite its size, it offers strong water flow and reliable shutoff performance.
  • Standard 3/4" Side Inlet Connection: Features a 3/4" male threaded Top inlet for quick and easy installation on common pipe fittings—compatible with both plastic and metal plumbing systems.
  • Multi-Use Applications: Perfect for automatic water refilling in tanks, ponds, fish farms, pools, hydroponic setups, and livestock troughs. Just set your preferred fill level and let the valve do the rest—no overflow, no water waste.
8.7
Excellent
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10
8.7
Excellent
1/2" Inch Part 1 Ball-Cock Float Valve with Ball/Float. Manufactured to BS1212
PlumbEZ
1/2" Inch Part 1 Ball-Cock Float Valve with Ball/Float. Manufactured to BS1212
Free Shipping
8.7
Excellent
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