1 / 14

Module 2: Domestic Hot and Cold Water Services Unit 9 – Valves and Taps Duration – 11 Hours

Module 2: Domestic Hot and Cold Water Services Unit 9 – Valves and Taps Duration – 11 Hours. In this module we learn how to: Describe the types and application of valves and taps used in domestic plumbing systems. Describe the operation and components of valves and taps.

thomasfreeman
Download Presentation

Module 2: Domestic Hot and Cold Water Services Unit 9 – Valves and Taps Duration – 11 Hours

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Module 2: • Domestic Hot and Cold Water Services • Unit 9 – Valves and Taps • Duration – 11 Hours

  2. In this module we learn how to: • Describe the types and application of valves and taps used in domestic plumbing systems. • Describe the operation and components of valves and taps. • Replace stopcock, tap and ballvalve washers.

  3. Key Learning Points • RK Types and application of taps - pillar taps, mixer taps, monobloc taps, bib taps, etc. • RK Types and application of valves - stopcocks, gate valves, lever valves, drain cocks, etc. • RK Operation and components of taps and valves. • RK Types, components and operation of float assisted valves – high pressure, low pressure, diaphragm, portsmouth (BS), equilibrium. • RK Ball valve problems – water hammer, leaking, sticking, furring, cavitation. • SK Replacement of tap and valve washers. • SK Identification of different types of washers, o rings etc. • SK Use of tap re-seating tools. • P Good working practice. • P Problem solving. • P Working independently.

  4. Valves and Taps • Valves and taps are devices designed to regulate, open or close the flow of • liquid or gas in a pipeline. • Some of the more common valves and taps and their uses are as follows: • Stopcock - Used on incoming high pressure water mains. • Gate valve - Used on low pressure pipework. • Drain off cock - Used to drain pipework. • Bib tap - A well mounted tap primarily used over sinks. • Pillar tap - Used on sinks, wash hand basins and baths. • Mixer taps - A tap which hot and cold water are delivered through a common spout. Used in sinks. • Plug cock - A quick closing valve used mainly on gas installations. • Radiator valves - Used to control the flow of water to and from radiators.

  5. Repacking Glands on Radiator Valves

  6. Back Siphonage • The backflow of water by siphonic action from an appliance or storage cistern • into the pipe feeding it, thus contaminating the water supply. • Any pipe on mains supply connected to appliances and cisterns must have • some means of backflow prevention. Where an outlet discharges, ensure an • allowance is made for an air gap of at least that shown in the chart. • If a specified air gap cannot be achieved some other means of backflow • prevention must be catered for. In the case of hose pipes and shower • hoses connected to the mains supply a double check valve assembly or • similar arrangement such as a check valve followed by an anti-vacuum • valve must be used.

  7. Draw Off Taps

More Related