Commercial Fixtures Flashcards
Flush Valves:
- to increase the volume that goes through per flush what way would you adjust it
- what are the 4 types of flush valves
- briefly describe how Flush valves work
Flush Valves:
- To adjust flow rate turn clockwise to increase volume
- There are 4 types: Piston, Diaphragm, Metering, and Electronic (2 electric types: Diaphragm and Solenoid)
- How they Work:
All chambers start at 60 psi
When valve is activated the top chamber loses its 60 psi
This lifts the Diaphragm allowing all other chambers to empty
Then all chambers will fill up again, and because there is more total force on the top chamber it will push the diaphragm back down.
Urinal Flush Tanks:
- what type of siphon does it utilize for the flush?
- What is the max amount of urinals per flush tank?
- What are the 2 sixes of flush tanks?
- what type of valves are often used to activate the flush and what ways are they regulated?
Urinal Flush Tanks:
- Utilize what is called a Bell Siphon
- Max urinals served for 1 Flush Tank is 5
- 2 sizes 3 gal = 3 urinals and 5 gal = 5 urinals
- To activate often you’d use Solenoid valves with motion sensors, timers or are wired to light switches
Direct Flush Water Closets:
- what must it have to prevent back siphonage
- can it be both wall hung and floor mount?
- what system does it utilize for a flush?
Direct Flush Water Closets:
- Must have vacuum breaker unless designed to prevent back siphonage already
- Can be floor or wall hung
- Uses Flush valve system (Flushometer)
Wall Hung Direct Flush Water Closets
- what are the 2 bowl types and how many bolts does each use?
- are tank type WC available as wall mounted?
- what is the wall mounting system called?
- what is the main advantage of a wall mounted toilet?
Wall Hung Direct Flush Water Closets
- Two Types
Syphon Jet: 4 Bolt pattern
Blow out: 3 Bolt pattern
- Note: Tank type WC are available but not common
- Mounting system adjustable and called Carrier
- Useful for easy floor cleaning
Wall Hung Urinals
- Where is the trap located on a wall hung urinal? and why?
- what can and cant a urinal urinal be installed on?
Wall Hung Urinals
- Most Urinals nowadays have a integral p-trap (like a WC s-trap) because back in the day a exterior P-trap would be susceptible to vandalism
- Urinals cant be installed on walls that are previous to water, for example drywall. (they should be installed on a wall such as tyle)
Trap Primer
- what is it used for?
- what size line is used to supply them?
- What are the 4 most common types?
- what is usually required by code to prevent back siphonage
Trap Primer
- Under used traps in a building will eventually evaporate, so we install Trap Primers to keep The proper trap seal depth maintained
- Usually supplied in ½” line except for the flush valve type which is ⅜”
- Types:
Flush Valve (installed under the vacuum breaker)
Pressure Drop Activated
Automatic Timed
Inline Trap Primer (most common)
- Many trap seal primers have a Air Gap as required by code
Sterilization Equipment (Autoclave)
- what is this used for?
- does it have to be directly or indirectly connected to a drainage system?
- can it be connected to a storm or waste drainage system or both?
Sterilization Equipment (Autoclave)
- Used to sterilize medical equipment
- Must be indirectly connected to a drainage system (have a Air Brake) see: 2.4.2.1 and 2.3.3.11
- Can be indirectly connected to a storm or waste drain
Grease Interceptors
- What are the 3 different installation types?
- What are 3 different types?
- where is the flow control installed?
- when should you use a dilution tank before the interceptor and why?
- when is an interceptor allowed to act as a trap
Grease Interceptors
- 3 different installation styles
Floor mounted
Recessed
Semi-Recessed
- 3 Types
Conventional (most Common)
Enzyme Interceptor
Automatic draw off
- Flow control: install upstream of interceptor, use the one provided with package
- If temperatures from Pipes are above 75 degrees Celsius, install a dilution tank or Aqua stop to cool water temperatures, or else the hot water could take grease and oils with it
- An interceptor is permitted to act as a trap as long as it has a water seal no less the 38mm
Oil Interceptor
- What liquids does it prevent from entering a drainage system?
- where must vent/s be placed?
- what is the minimum size and other rules about the vent/s for an oil interceptor
Oil Interceptor (2.5.5.2)
- Prevents harmful liquids from entering drainage systems such as:
Oil
Gasoline
Paint
Combustible liquids
- Must have at least 2 vents that
Connect on opposite ends
- Extend independent to outside air
Are at least 1 1/4” in size
Solids Interceptor
- does a solids interceptor have to be restricted to 1 fixture?
- is it able to act as a trap?
- What kind of materials can it catch?
- where can an organic solids interceptor be installed?
- what is the minimum trap seal depth of a trapped sump?
Solids Interceptor
- Usually specific to a single fixture (does not have to be)
- May act as a trap for fixtures
- Useful for catching things such as Hair, lint, grindings, ceramic waste, plaster, dental waste
- An organic solids interceptor is allowed to be installed upstream of a grease interceptor
- A trapped Sump must have a 6” (150mm) trap seal depth
Indirectly connected Fixtures
- what must it have before connecting to the sanitary drainage system?
- where cant indirect connections be located?
can drinking fountains be directly and indirectly connected?
Indirectly connected Fixtures
- Fixtures with Indirect connections shall utilize an Air brake and follow the rules associated with it
- Indirect connections can not be in crawl spaces
- Drinking fountains maybe indirectly or directly connected
Commercial Kitchen Sink
- What material are they typically made of?
- what size must the FOP be on a 3 compartment sink?
- what kind of over flow is allowed on a kitchen sink?
Commercial Kitchen Sink
- Typically made of SS
- A 3 compartment sinks trap must be one size bigger then the largest fixture outlet pipe
- Not allowed to have a concealed overflow, but you can use a “standing waste and overflow”
Combination Ovens
- What methods is used to heat the food?
- what is a advantage of this kind of oven
- what powers it?
Combination Ovens
- Uses Convection, Steam and a combination of the two
- The steam prevents moisture loss in food
- Can be in gas or electric
Mop Sink (Floor Sink)
- What is it used for?
- What do you use to determine FUs
- what must it have if a hose is connected tp it?
Mop Sink (Floor Sink)
- Used to fill or dump mop pails
- 8” centers (not always)
- Use “other sinks” in table 2.4.9.3 for sizing
- The Faucet has a hose end connection, but must have a Atmospheric vacuum Breaker (AVB) if hose is attached
- Often the AVB is already installed in the faucet
Sluice Sink (Flush or slop sink)
- What are they usually made of
- What is disposed into them?
- what kind of trap does it use
- what does it use as a flush mechanism
Sluice Sink (Flush or slop sink)
- Usually SS
- Made to receive contents of a bedpan
- Uses a S-Trap And either a Flushtank, or Flush water supply
- Uses Cistern (flush tank) or interval supply
