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Troubleshooting Common Toilet Problems

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Toilet Tank Components
Troubleshooting Common Toilet Problems

Toilet Tank Components (Float Cup Ballcock)

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Toilet Tank Components
The toilet tank is where all the major plumbing takes place in a toilet. The purpose of the tank is to contain the water needed to flush the toilet and to conceal the plumbing apparatus that fills and empties the tank.
  • Open any two toilet tanks and you'll often find very different components inside. Why? Well new technologies and materials have evolved over the past several decades, but in the end, there are just two major components with several variations. The two major components are:
  • Fill Valve (or Ballcock) and
  • Flush Valve
  • The Fill Valve is the mechanism that fills the tank with water. It is also known as a Ballcock or sometimes a refill valve. It comes in four basic variations:
  • Plunger Type Ballcock (oldest style brass type valve)
  • Diaphragm Type Ballcock (older brass style and newer plastic type valve)
  • Float Cup Type Ballcock (newer plastic type)
  • Floatless Type Ballcock (newer plastic type)
Compare PricesToilet Fill Valves / Ballcocks
  • The Flush Valve is what releases the water stored in the tank, closes the flow of water into the toilet and allows the tank to refill for the next use. It is the assembly that bolts to the bottom of the tank and includes the overflow pipe and the valve seat. The flush valve has two common variations used to seal the valve seat:
  • Tapered Rubber Float Ball or
  • Flapper Ball (tank flapper)

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