Cold Water Systems PowerPoint PDF

POWERPOINT 1 TYPES OF DOMESTIC COLD WATER SYSTEMS  LESSON INTENT LEARNERS WILL BE ABLE TO UNDERSTAND THE RAINWATER CYCLE & WHERE DIFFERENT SOURCES OF WATER ARE FORMED LEARNERS WILL BE ABLE TO EXPLAIN HOW WATER IS ROUTED TO A DOMESTIC HOUSE LEARNERS WILL BE ABLE TO IDENTIFY...

POWERPOINT 1 TYPES OF DOMESTIC COLD WATER SYSTEMS  LESSON INTENT LEARNERS WILL BE ABLE TO UNDERSTAND THE RAINWATER CYCLE & WHERE DIFFERENT SOURCES OF WATER ARE FORMED LEARNERS WILL BE ABLE TO EXPLAIN HOW WATER IS ROUTED TO A DOMESTIC HOUSE LEARNERS WILL BE ABLE TO IDENTIFY EACH PIPE AND CONNECTION ON A TYPICAL INCOMING MAIN TO A PROPERTY LEARNERS WILL BE INTRODUCED TO SOFT AND HARD WATER & WHAT MAKES THEM DIFFERENT.  STARTER ACTIVITY UNDO THESE MIXED UP WORDS THEY ARE ALL COLD WATER TOPIC WORDS TIONEVAPORA TATIONPRECIPI DENSATIONCON ERWAT INRA UDSCLO ONCE YOU HAVE UNDONE THESE WORDS CAN YOU SAY WHAT THEY MEAN? THE WATER REGULATIONS (1999) THE WATER REGULATION GUIDE (WRAS) WRAS – WATER REGULATION ADVISORY SCHEME BS EN 806 – DESIGN, INSTALLATION, TESTING AND MAINTENANCE MANUFACTURERS INSTRUCTIONS DIRECTORY OF FITTINGS (WRAS APPROVED) WRAS APPROVED FITTINGS COMPLY WITH THE WATER REGULATIONS ARE A LEGAL REQUIREMENT IN THE UK. THEY ARE ALSO A QUALITY PRODUCT, CORROSION RESISTANT WITHIN THEIR ENVIRONMENT AND ARE MADE OF MATERIALS THAT DO NOT CAUSE CONTAMINATION. THE WATER REGULATIONS REPLACED THE INDIVIDUAL BYE LAWS TO GIVE A NATIONAL LAW FOR ENGLAND AND WALES: WASTE UNDUE CONSUMPTION MISUSE CONTAMINATION ERRONEOUS MEASUREMENT OF WATER RAIN WATER CYCLE RAIN WATER CYCLE IN SIMPLE TERMS. EVAPORATION: IS WHEN WATER MOLECULES MOVE APART. PRECIPITATION: IS WHEN WATER MOLECULES CONDENSE AND FALL AS RAIN.  COLD WATER DISTRIBUTION NAME THESE DIFFERENT TYPES OF SURFACE WATER: Lakes Reservoirs Rivers Streams THE 600MM MAIN IS THEN DIVIDED IN TO SMALLER PIPES UNTIL EVENTUALLY IS A 100, 63, 50, 32 OR 25MM PIPE SERVING A PARTICULAR AREA. THE PIPES USED TO BE MADE OF CAST IRON, BUT HAVE RECENTLY BEEN REPLACED WITH MDPE PIPE. (MEDIUM DENSITY POLYETHYLENE)  A TYPICAL MAINS DISTRIBUTION SYSTEM Trunk Main THIS NOW MEANS A ROAD COULD BE SERVED BY A 25MM PIPE WITH INDIVIDUAL 20MM MDPE PIPE SERVING EACH HOUSE. MDPE PIPE IS GENERALLY FUSION WELDED WITH SOME COMPRESSION FITTINGS. WITH CAST IRON AND MDPE PIPES A SCREWDOWN FERRULE CONNECTOR OR SERVICE UNION IS INSTALLED ALLOWING THE VALVE TO BE OPENED OR CLOSED WITH A FERRULE KEY. COLD WATER DISTRIBUTION  SUPPLY PIPEWORK TO DOMESTIC BUILDING. Communication Service pipe: pipe: Owned and Owned and maintained by maintained by water undertaker. house owner 2. UNDERGROUND SOURCES WELLS, BORE-HOLES AND SPRINGS UNDERGROUND SOURCES THESE ARE QUITE OFTEN ‘PRIVATE SUPPLIES’ AND NOT PROVIDED BY A WATER UNDERTAKER AND ARE NOT COVERED BY THE WATER REGULATIONS. WELLS: DEEP, SHALLOW AND ARTESIAN WELLS 2. UNDERGROUND SOURCES BOREHOLES: THESE ARE MODERN EQUIVALENTS TO WELLS, BUT ARE SMALLER, LESS INTRUSIVE AND EASIER TO MAINTAIN. A SMALL DRILLED HOLE IS MADE IN TO THE GROUND AND WATER IS PUMPED TO THE SURFACE. SPRINGS: ARE NATURALLY OCCURRING SOURCES OF WATER THAT FORCE WATER TO THE SURFACE AND SOMETIMES CAUSE THE START OF A STREAM. Green = Soft water Yellow = semi hard water Red = Hard water THE ABILITY OF WATER TO ABSORB MINERALS IS CALLED PLUMBO SOLVENCY PERMANENT HARD WATER. THIS IS WATER THAT CONTAINS CALCIUM SULPHATES OR (LIMESTONE). THE HARDNESS OF THIS WATER CANNOT BE REMOVED BY BOILING. RAIN HAS FALLEN TO THE GROUND AND FILTERED THROUGH LIMESTONE AND DISSOLVED THE SULPHATES OF CALCIUM. THIS TYPE OF HARDNESS DOES NOT CAUSE MUCH SCALING IN BOILERS AND KETTLES. TEMPORARY HARD WATER. THIS IS WATER THAT CONTAINS CALCIUM CARBONATES. THE HARDNESS OF THIS WATER IS REMOVED WHEN IT IS HEATED TO 650C. WHEN HEATED CO2 IS REMOVED AND THE CALCIUM CARBONATE FROM SCALE! (BLOCKAGES AND EFFICIENCY) SOFT WATER. THIS IS WATER THAT IS FREE FROM CALCIUM CARBONATES AND SULPHATES. IT IS EASY TO GET A LATHER WITH SOAP. IT IS EITHER NATURALLY SOFT HAVING FALLEN ON PEATY GROUND BEING MILDLY ACIDIC OR CAN BE PRODUCED BY A WATER SOFTENER. THE ACIDIC NATURE OF THIS WATER ALSO CAUSES PROBLEMS TO PLUMBING SYSTEMS THROUGH ELECTROLYTIC CORROSION.  Cold water distribution The pH scale 1 2 3 4 5 6 7 8 9 10 11 12 Acidic Neutral Alkaline The pH scale indicates whether the water is acidic or alkaline, (potential of hydrogen). If the pH value is below 7, the water will be acidic and aggressive towards pipe work. In the worst cases people drawing directly from a well could be changing their DHW cylinder every 8 months unless the pH can be corrected! Plumbers must be aware of the type and quality of water supplied to any property as this could have an affect on the appliances within the property. Under The Water Regulations, plumbers also have a responsibility to maintain the quality of water supplied by the water undertaker avoiding contamination.  TEST YOUR KNOWLEDGE WITH THESE QUESTIONS 1. WHAT IS CONDENSATION? 2. WHAT DOES THE WRAS MEAN? 3. NAME DIFFERENT TYPES OF SURFACE WATER? 4. WHAT IS THE COMMUNICATION PIPE? 5. WHAT IS THE SERVICE PIPE? 6. DEFINE PERMANENT HARD WATER? 7. DEFINE SEMI HARD WATER?  TRAFFIC LIGHT IT: WHERE IS YOUR LEARNING AT? RED = I HAVE NOT REALLY UNDERSTOOD THE CONTENT WE HAVE STUDIED TODAY (WRITE DOWN 2 QUESTIONS THAT YOU NEED HELP WITH) AMBER = I HAVE UNDERSTOOD THE CONTENT ON EFFECTIVE QUESTIONING (WRITE DOWN 1 ONE QUESTION YOU NEED TO CLARIFY) GREEN = I HAVE UNDERSTOOD ALL THE CONTENT (WRITE DOWN ONE EXAMPLE FROM WHAT WE HAVE