CSLB C-36 Plumbing ContractorFixture and Appliance InstallationHard
A plumber is called to a commercial building to address a consistently running toilet. Upon inspection, the plumber determines that the fill valve is faulty. The building's plumbing system operates at a higher-than-average water pressure. When selecting a replacement fill valve, what characteristic is most important to consider for durability and reliable operation in this scenario?
- AA diaphragm-type fill valve designed for high pressure.
- BA float-cup type fill valve for quiet operation.
- CA low-flow fill valve to conserve water.
- DA universal fill valve for ease of installation.
Show answer & explanationAnswer & explanation
Correct answer: A. A diaphragm-type fill valve designed for high pressure.
In high-pressure environments, a diaphragm-type fill valve is generally preferred over plunger or float-cup types because its design is more robust and less prone to wear and tear from constant high pressure, leading to greater durability and reliable shut-off.
Why the other options are wrong
- B. Float-cup types can be quiet but may not be as durable under sustained high pressure as diaphragm types.
- C. Low-flow is a water conservation feature, not directly related to durability under high pressure.
- D. Universal valves prioritize compatibility and ease of installation, but not necessarily durability in specific high-pressure conditions.
Diaphragm Fill Valve
A type of toilet fill valve that uses a flexible diaphragm to control water flow, offering excellent sealing and durability, especially in high-pressure systems.
- More durable and less prone to leaks than plunger-type valves.
- Often quieter in operation.
- Suitable for high water pressure environments.
Memory trick: For high pressure, 'Diaphragm' valves 'Deliver Durability'.