Thomas Dudley Plastic Float - Red

The Thomas Dudley Plastic Float is a reliable and durable solution for buoyancy control in water s...

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The RangeThomas Dudley Plastic Float - Spherical 5" Dia, 5/16" - Ptoflo370211 - Perfect For Pools And Ponds - Red
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£7.27
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eBayPlastic Float - Spherical 5"" Dia, 5/16"" - PTOFLO370211
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£7.77
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OnBuy.comPlastic Float - Spherical 5" Dia, 5/16" - Ptoflo370211 - Perfect For Pools And Ponds 5051258005076
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£8.21
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B&QB&Q - Plastic FloatSpherical 5" Dia5/16"Ptoflo370211Perfect For Pools And Ponds
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£8.50
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Product Information

Full details

The Thomas Dudley Plastic Float is an essential component for individuals and professionals managing buoyancy control in water systems such as ponds, pools, and header tanks. Designed for reliable performance with 1/2 and 3/4 inch BSP float valves, this 5-inch red float offers long-lasting durability thanks to its reinforced threaded brass insert; however, users should ensure the float remains clear of tank walls to avoid mechanical interference during operation.

All features

ColourRed
Model Part NumberPTOFLO370211
BrandThomas Dudley

Extended Product Information

FAQs

What is the diameter of this float?

This model has a 5-inch diameter, providing sufficient buoyancy for most standard domestic applications.

Will this fit a 3/4 inch float valve?

Yes, it is designed to be compatible with both 1/2 inch and 3/4 inch BSP float valve arms.

What is the threaded insert made of?

The threaded insert is made of brass, which provides superior strength and prevents the plastic threads from stripping during installation.

Can I use this in a drinking water tank?

This float is generally used for header tanks, ponds, and pools; please ensure the material meets your specific local regulatory requirements for potable water if applicable.

How do I know if the float needs replacing?

If you notice the float sitting lower than usual in the water, or if it is physically cracked or waterlogged, it is time for a replacement.

Troubleshooting

Water continues to flow even when the tank is full

Check if the float arm is bent or if the float is hitting the side of the tank, preventing it from rising fully.

Float is submerged and failing to shut the valve

Inspect the float for pinhole leaks; if it has filled with water, it must be replaced as it can no longer provide necessary buoyancy.

Pros and Cons

Pros

  • Resistant to corrosion and water damage
  • Easy to install on standard valve arms
  • Reinforced brass thread increases product lifespan
  • Compact 5-inch size fits most standard cisterns and tanks

Cons

  • Must be kept clear of tank debris
  • Limited to 5/16 inch threaded connection points
  • Not intended for heavy-duty industrial chemical exposure

Setup, Compatibility & Care

Installation is straightforward. Simply thread the float onto the end of your existing 1/2 or 3/4 inch BSP float valve arm until it sits securely against the brass insert. Ensure the arm is adjusted to the appropriate angle so the valve closes before the water reaches the overflow pipe.

  • Compatibility: Compatible with standard BSP float valve configurations.
  • Maintenance: Periodically check the float for cracks or signs of water ingress. If the float feels heavy or sinks, the internal air pocket has likely been compromised and it should be replaced.
  • Cleaning: Gently wipe the surface if mineral deposits (limescale) build up, as this can affect the total weight and buoyancy profile of the unit.

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