Illinois Plumbing Code Practice

What should be the minimum constant water pressure at each fixture as recommended by the fixture manufacturer according to the Illinois Plumbing Code?

1. 6 p.s.i.

2. 8 p.s.i.

3. 10 p.s.i.

4. 12 p.s.i.

The correct answer is: 8 p.s.i.

The minimum constant water pressure at each fixture, as recommended by the fixture manufacturer according to the Illinois Plumbing Code, is 8 p.s.i. This standard is crucial for ensuring proper operation of plumbing fixtures, as adequate pressure is necessary for efficient water flow and function. Insufficient pressure can lead to issues such as inadequate flushing in toilets, decreased performance in showers and faucets, and potential backflow problems. Maintaining this pressure helps to prevent any malfunctions and ensures that the plumbing system operates smoothly. Fixture manufacturers specify this pressure based on the design and function of their products, making it important for compliance with the code and for the reliable performance of the installed fixtures. Other pressure levels listed do not align with this standard, highlighting the importance of adhering strictly to the manufacturer's specifications and the Illinois Plumbing Code requirements.