Podcast
Questions and Answers
What is the core component responsible for regulating water flow in a ceramic disc tap?
What is the core component responsible for regulating water flow in a ceramic disc tap?
What is the minimum distance required above a cold water storage cistern for maintenance access?
What is the minimum distance required above a cold water storage cistern for maintenance access?
Which type of tap is specifically designed for mixing hot and cold water within its body?
Which type of tap is specifically designed for mixing hot and cold water within its body?
What component of a Byelaw 30 kit is specifically designed to prevent overflow from the cold water storage cistern?
What component of a Byelaw 30 kit is specifically designed to prevent overflow from the cold water storage cistern?
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Which type of tap features a rubber washer that closes against a seat to regulate water flow?
Which type of tap features a rubber washer that closes against a seat to regulate water flow?
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What is the primary reason for using WRAS approved fittings in cold water systems?
What is the primary reason for using WRAS approved fittings in cold water systems?
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Where is a "Sure Stop" valve commonly installed in a cold water system?
Where is a "Sure Stop" valve commonly installed in a cold water system?
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Which of these is NOT a characteristic of a "Fullway Gate Valve" used in a cold water system?
Which of these is NOT a characteristic of a "Fullway Gate Valve" used in a cold water system?
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Which of these is an example of a "below ground" water source?
Which of these is an example of a "below ground" water source?
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Which type of cold water system utilizes a CWSC (Cold Water Storage System)?
Which type of cold water system utilizes a CWSC (Cold Water Storage System)?
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Which type of float-operated valve is considered outdated and not recommended for use due to a potential backflow risk?
Which type of float-operated valve is considered outdated and not recommended for use due to a potential backflow risk?
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What is the primary purpose of a drain-off valve in a cold water system?
What is the primary purpose of a drain-off valve in a cold water system?
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What is the correct order in the distribution of water from a Water Treatment plant?
What is the correct order in the distribution of water from a Water Treatment plant?
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What is back siphonage?
What is back siphonage?
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Which type of valve is used to protect Fluid Category 1 from Fluid Category 3?
Which type of valve is used to protect Fluid Category 1 from Fluid Category 3?
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What is the purpose of an air gap (AG)?
What is the purpose of an air gap (AG)?
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Which height is required for an AUK 1 air gap?
Which height is required for an AUK 1 air gap?
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What characterizes passive dead legs in plumbing systems?
What characterizes passive dead legs in plumbing systems?
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What is the pressure test procedure for rigid (copper or LCS) pipework?
What is the pressure test procedure for rigid (copper or LCS) pipework?
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What happens during temporary decommissioning of a plumbing system?
What happens during temporary decommissioning of a plumbing system?
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How should plastic pipework be tested according to the guidelines?
How should plastic pipework be tested according to the guidelines?
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Study Notes
Water Regulations Advisory Scheme (WRAS)
- WRAS approved fittings are legally required to be corrosion resistant and avoid contamination.
- Standards are outlined in BS EN 806 for design, installation, and maintenance.
Water Cycle
- Rainwater cycles involve evaporation, condensation, and precipitation.
- Water sources include lakes, rivers, reservoirs, streams, wells, and boreholes.
Water System Components
- Water treatment plants, trunk mains, principle mains, local mains, communication pipes, and service pipes are components of a water system.
- Mains water pipes are typically made of Medium Density Polyethylene (MDPE) and are blue in color.
Cold Water System Installation
- Consider pressure and flow rates during peak times.
- Pressure is measured with a pressure gauge; flow rate with a flow/weir cup (liters/second or liters/meter).
- Direct systems supply all outlets from the mains (drinkable).
- Indirect systems supply outlets (except kitchen taps) from a cold water storage system in the loft.
Fluid Categories
- Category 1: Wholesome water supplied by the water undertaker.
- Category 2: Wholesome, but some qualities are slightly impaired (aesthetically).
- Category 3: Slight health risk, not potable.
- Category 4: Significant health risk, potentially toxic.
- Category 5: Severe health risk, most likely fatal.
Isolation and Valves
- Sure Stop: A diaphragm valve closing under water pressure.
- Fullway Gate Valve: Used for low-pressure (gravity) systems. Replacement is required if defective.
Other Components
- Stop Valves: Used on high-pressure mains; parts can be replaced if defective.
- Isolation/Service Valves: Quarter-turn valves installed before appliances (toilets, basins, boilers, etc).
- Drain Valves: Placed at low points to empty the system.
- Float Operated Valves: Part 1 - Portsmouth Valves, Brass, Bottom Outlet, Piston type
- Part 2 - Brass, Diaphragm washer, Top outlet, CWSC and Toilet Cistern
- Part 3 - Plastic, Diaphragm, can be Side or Bottom entry, top outlet, used in toilets not suitable in CWSC as it could become brittle
- Part 4 - Plastic, Equilibrium valve, Diaphragm, bag attached to top outlet to help fill quieter and will also prevent back flow
Cold Water Storage Cisterns
- Byelaw 30 kit specifications (Screened vent, Tank Lid, Tank Insulating Jacket, Overflow/warning pipe, Dip Pipe, Screen for overflow, FOV Part 2, Tank connector)
- CWSC to be situated on plywood (not chipboard); 150mm all around and 350mm minimum above for access.
Taps
- Pillar Taps: Rising spindle and non-rising spindle (used in baths, basins, bidets).
- High Neck Pillar Tap: Same as a normal Pillar Tap higher used for kitchen sinks.
- Quarter Turn Ceramic Disc Tap: A tap with two discs in which water flow is regulated.
- Mixer Taps: Hot and cold water mix within the body and must have backflow prevention (single check valve).
- Bi-flow Mixer: Water does not mix inside the tap.
- Bib Tap: Primarily used outside or for butler sinks
Backflow Prevention
- Backflow: Water travelling in the opposite direction.
- Back Siphonage: Water drawn backwards due to negative pressure.
Water Testing
- Rigid Pipework (Copper/LCS): Fill the system, allow 30 minutes for stability, raise pressure by 1.5 times working pressure and leave for 1 hour.
- Plastic Pipework: Fill and raise pressure to 1 bar for 45 minutes, increase to 1.5 times the working pressure and leave for 15 minutes, then reduce to 1/3 and test for another 45 minutes.
Other Considerations
- Temporary Decommissioning: Indicates temporary isolation during work.
- Permanent Decommissioning: Isolation and drainage of a system for permanent removal.
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Description
This quiz covers essential information about water regulations, the water cycle, and key components of water systems. It includes standards for water fittings, cycle processes, and installation guidelines for cold water systems. Perfect for those looking to understand water management and infrastructure.
