Questions and Answers
The code requirement for an adequate supply of potable running water is for?
Cleansing and sanitation
The primary reason for installing a backflow prevention assembly is?
Prevent pollution or contamination of the potable water supply
Ball cocks in water closet tanks shall be installed so that the critical level of the water inlet is above the full opening of the overflow pipe at least?
1 inch
A vacuum breaker installed above the highest part of a urinal equipped with a flushometer valve shall be located at least?
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A vacuum breaker installed above the overflow rim of a vat shall be located at least?
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A vacuum breaker installed above all downstream piping for a lawn sprinkler system shall be located at least?
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Pex tubing shall not be installed within the first ______ inches of piping connected to a water heater.
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Backflow prevention devices installed in the water supply line to steam boilers shall be installed _____ inches above the ______.
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Each outlet on a nonpotable waterline that may be used for drinking purposes shall be posted?
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The piping material not approved in the cold water piping located inside a building is?
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All malleable iron water fittings shall be?
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Water valves 2 1/2 inches and larger may have bodies that are?
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Changes in direction of copper tubing may be made with?
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Water piping systems shall be designed on the basis of the ____ pressure.
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Copper water tube M may be installed within a building?
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Immediately ahead of each water supplied appliance and each slip joint or nonmetallic water supply connection is required a _____ valve.
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After allowing for friction and other pressure losses, the residual water pressure shall be at least?
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A water piping system with a pressure of 110 psi will require a?
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Any water heater connected to a separate storage tank and having valves between the heater and tank shall be provided with a?
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Combination temperature and pressure relief valves shall be installed?
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Galvanized steel piping installed under a concrete floor slab within a building shall?
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Cast iron fittings, up to and including two inches in size, when used in connection with potable water piping shall be?
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Water piping may be installed in the same trench with sewer piping made of?
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The available pressure at the water meter is 80 psi. At the highest supply outlet, 36 feet above the water meter, the pressure would be ______ PSI when sizing a water system according to chapter 6.
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Building supply pipes shall be no smaller than that required for the installation and in no case smaller than?
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Copper tubing used for water piping under a concrete slab within a building shall be?
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CPVC water pipe may be used for hot and cold water distribution systems?
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Flexible corrugated connectors or stainless steel for water heater connectors shall be limited to?
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Unions shall be installed in a water supply system within 12 inches of?
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Study Notes
Water Supply and Distribution
- An adequate supply of potable running water is essential for cleansing and sanitation.
- Backflow prevention assemblies are crucial to prevent pollution or contamination of the potable water supply.
- Ball cocks in water closet tanks must have the critical level of the water inlet at least 1 inch above the overflow pipe.
Vacuum Breaker Requirements
- Vacuum breakers installed above urinals with flushometer valves must be positioned at least 6 inches above the highest part.
- The same 6-inch minimum applies when installed above the overflow rim of a vat and downstream piping for lawn sprinkler systems.
Piping Regulations
- PEX tubing cannot be installed within the first 18 inches of piping linked to a water heater.
- Backflow prevention devices for steam boilers should be positioned 12 inches above the floor level.
- Nonpotable waterlines must have outlets clearly marked with a caution sign indicating nonpotable status.
Materials and Installation Guidelines
- PVC, asbestos cement, and PE are not approved for cold water piping inside buildings.
- All malleable iron water fittings must be galvanized.
- Water valves with sizes 2 1/2 inches and larger can be made of cast iron or brass.
Design Standards
- Copper tubing must be bent using appropriate bending equipment to make directional changes.
- Water piping systems should be designed based on minimum pressure requirements.
- Copper water tube M is only permitted for above-ground installation.
System Components
- Control valves are required ahead of each water supply appliance and at non-metallic water supply connections.
- Residual water pressure after accounting for friction losses must remain at least 15 psi.
- Systems with a pressure of 110 psi need a pressure regulator and strainer for safe operation.
Water Heater Safety
- Separate storage tanks connected to water heaters must be equipped with a water pressure relief valve.
- Combination temperature and pressure relief valves should be installed according to manufacturers' specifications.
Protection and Compatibility
- Galvanized steel piping located under concrete floors needs machine-applied protective coating.
- Cast iron fittings up to 2 inches in size must be galvanized for use with potable water.
- Water piping can share trench space with cast iron sewer piping under certain conditions.
System Performance
- At a water meter pressure of 80 psi, the pressure at a supply outlet 36 feet above will be 62 psi.
- Building supply pipes cannot be smaller than 3/4 inch regardless of installation requirements.
Joint and Connection Requirements
- Copper tubing under concrete must be installed without joints wherever feasible.
- CPVC water pipe is allowed for both hot and cold water distribution within buildings.
- Flexible connectors for water heaters should not exceed 24 inches in length.
Additional Installation Protocols
- Unions in water supply systems need to be placed within 12 inches of regulating equipment to maintain system integrity.
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Description
Test your knowledge with these flashcards covering Chapter 6 of the Uniform Plumbing Code. Focused on water supply and distribution, this quiz emphasizes essential plumbing regulations to ensure sanitation and safety. Great for students and professionals alike!
