Plumbing and Drainage Installation

[Virtual Presenter] Welcome everyone! We're here today to discuss the plumbing and drainage installation detailed design presentation. Let's take a look at some key elements of this presentation that we'll be covering today. Appreciate your time and attention..

[Audio] We will be looking at the key elements of design including plumbing installation drainage installation calculation examples for water pumps water tanks main stack pipe sizing water pipe sizing grease trap sizing boiler calculation petrol interceptor sizing water heater sump pump calculation solar hot water system rainwater harvesting system grey water recycling system and more. All of these elements are explained in detail on the respective pages of our presentation and will be discussed extensively in the following slides..

[Audio] This table provides a comprehensive list of the major equipment included in our plumbing and drainage installation detailed design. Item Quantity and kW for Tower 1 and Podium Storey as well as UR/F B1/F and B2/F storeys are listed including their respective values for each type of booster pump electric calorifier heat pump and rainwater/grey water recycle pump..

[Audio] This slide provides the Water Distribution data. It displays Tower 1 Storey Level Level Difference from the UR/F Water Tank Outlet Pressure After Pump and Remark. The table illustrates the pressure (in bar) across different floors depending on the difference in level from the UR/F Water Tank (in meters). Having this data we can gain a better knowledge of the water pressure required in the floors of the building and make necessary alterations to the systems..

[Audio] The slide in question is regarding the necessary calculations for a fresh water booster pump system that goes from the ground floor up to the 6th floor a total height of 38.3 meters. The copper pipe used has a flow rate of 32.4 m3/hr with a 67 millimeters diameter and a length of 40 meters The velocity of the flow is 2.6 m/s and the head loss is 0.1 mH/m. In addition the minor losses for the 90 degree elbows tees and gate valves are 0.743642971 0.093699014 and 0.007138973 respectively resulting in the total minor losses for the system amounting to 15.91851462 meters This gives a total head loss of 54.168514623 meters When the 10% safety factor and 10 meters water outlet pressure is included the total head calculated amounts to 74.585366085 meters Lastly the pump head required for the system comes to 80 m necessitating an 11 kilowatt power for the pump..

[Audio] The slide number 6 shows a table with data about the plumbing and drainage installation detailed design. According to the technical requirements for plumbing works in buildings (December 2021 version) #6.2.5.2 the flushing volumes should be 30 liters per each WC. This means that the total flushing water tank volume of Tower 1 needs to be 3930 liters. This can be divided into two parts 982.5 liters for B2/F and 3127.5 liters for R/F. Moreover the table provides information about the total number of units for each floor in Tower 1 along with the corresponding discharge rate per unit. By summing up the loading and discharge unit the loading and discharge total can be calculated..

[Audio] Using the Technical Requirements for Plumbing Works in Buildings a minimum of 30 liters per urinal and 40 liters per WC should be considered. Additionally the Flushing Water Tank Sizing Table provides the number of WCs urinals basins sinks and accessory toilets across each floor of the building. By combining these two calculations the total volume of a flushing water tank for plumbing and drainage installations can be determined..

Loading Unit.

[Audio] For the Loading Unit and Discharge Unit the table provides an overview of the expected residential usage across Tower 1 from the 28th floor to the 22nd. The loading unit is computed as the sum of the L Flow multiplied by the number of fixtures. The discharge unit is calculated by multiplying the total loading unit by the discharge factor. The table shows that the total loading unit for the residential towers is 80 for water closet 123 for shower 82 for basin 200 for sink and 60 for washing machine while the total discharge unit is 72 for water closet 16.4 for shower 12.3 for basin 52 for sink and 160 for washing machine..

[Audio] Slide 10 covers the hot water supply system. We’ll look at the plumbing and drainage requirements for a centralized boiler system as well as a water heater for individual households. Our design team will provide detailed plans and specifications to ensure the system is efficient and compliant with local regulations..

Boiler Calculation. For Tower 1 (Service apartment tower) Hot Water System Shower Point Tower 2 7/F * 28,.'F Data Assumption: In order to fulfill the Hot water requirement, we assume some parameter as below. Shower flow Demand Period Cold-in temp Hot water tem Suppl temp For Hostel - Hot Water System 15 SDP 10 (CT) 15 HT) 60 (ST) 42 c of Hot water (at 420C) required within peak demand period: 17820 Litre = Shower (Factor x Flow x Points x Dernand period) Quanti of Hot water (at 60C) required within peak demand period for Shower point: 10692 Litre= 17820 We propose use: x (ST - CT)/ (HT - CT) 1800 Litre Storage Tank for Buffer usage Heating capacity ot Electric Calorifier Compact Unit water from 1 hour heat recovery time to heat up 1800 Litre 15 to 1800 60 x the required heating power will be 4.18 60 3600 x 10 15 ) - 94.05 propose 1 set 1800U95kW Electnc calorifier tor Hot water system For Pre-heat Energy Saving (Propose a Hot water storage tank tor Heat Pump Heat up) Propose a Pre-Heat Hot Water Storage Tank for Heat Pump Heat up Propose 1 set 1800L Hot Water Storage Tank for Pre-Heat Hot Water System Heat pump sizing tor Pre-Heat Hot Water Storage Tank Heating capacity ot Heat Pump Compact Unit water from 3 hour heat recovery time to heat up 1800 Litre 15 to 1800 60 x the required heating power will be 4.18 x ( 3600 x 60 3.0 15 Propose 1 set 40kW Air Source Heat Pump for Hot Water System Proposed equipment tor hot water plant Electric Calonfier Water Storage a Source Heat Pu Assumption: The Hot water System is unvented 1 sets sets 1 sets 1800L 800L 40kW 95kW NIL - 31.35 dia.1200 x 2500(H) 25000-1) 1300 x 1100X12 H m Open Vented System shall be used, additional heat transfer compact unit shall be designed for pressure break with booster heat up in order to avoid overflow from open vented calorifier. Assume the heat pump and calorifiers located at roof, and the heat pump is proposed to place outdoor..

[Audio] This slide presents our water heater calculations. We have determined that 6 water heaters are needed on the 28th floor and 7 water heaters on all other floors with each having a power of 18 kilowatt. This leads to a total of 132 water heaters with a total power of 2376 kilowatt..

Solar Hot Water System.

Catchment Area.

[Audio] Slide 15 deals with the Plumbing and Drainage Installation for the project. Rainwater will be discharged into the Government Storm Water Manhole “SMH4011300” while greywater and soil waste from the lavatories on each flat and podium floor will be discharged to the Government Manhole “FMH4010785”. This drainage system has been precisely designed to guarantee effective collection and discharge of all waste water..

[Audio] Stormwater pipe sizing is a vital compoment when it comes to plumbing and drainage installation. It is important to make sure that the right pipes are utilized for the specific purpose in which they are intended and that the sizes of the pipes are suitable for the amount of drainage needed. Additionally it is necessary to make sure that the stormwater pipes can handle the load and that the pipe layout is designed in such a way that it can handle any potential overloads..

[Audio] Slide 17 examines the sizing of the main stack pipe for the foul water. The total discharge unit for the Service Apartment from 20/F to 28/F for S-W-P and WP are 54 and 218 respectively with a K factor of 0.5 and a Q factor of 3.674235 and 7.38241153. For 9/F to 19/F the total discharge unit for S-W-P and WP are 63 and 252 respectively with a K factor of 0.5 and a Q factor of 3.968627 and 7.93725393. For 8/F to 7/F the total discharge unit for S-W-P and WP are 14 and 56 respectively with a K factor of 0.5 and a Q factor of 1.870829 and 3.74165738. This indicates a minimum sizing for the main stack pipe of 100 millimeters in diameter due to the WC outlet..

[Audio] The sizing of the grease trap must be taken into account for its successful installation. The minimum capacity of the grease trap is 1050 liters and its dimensions are 1800 millimeters in length 875 millimeters in width and 1000 millimeters in total depth..

[Audio] The petrol interceptor plays an essential role in this system design. It is responsible for catching and separating oil from wastewater in car parks. The three-compartment interceptors must have a retention time of twenty minutes to guarantee the wastewater is suitably filtered before being released. This design satisfies the criteria set out by the Environmental Protection Department..

[Audio] Slide 20 of the Plumbing and Drainage Installation Detailed Design Presentation provides a calculation of the sump pump capacity. The input data table contains parameters such as Sump Pit Inflow Rate from Rain Water and No. of Pump Starts/hour. The output data table presents the calculated Sump Pump Flow Rate and Sump Pump Head. Additionally the Sump Pit Effective Volume is computed based on the data in the input and output tables..

[Audio] Rainwater harvesting system is an excellent method to reduce water usage and associated bills. This presentation slide shows the computation to identify the required size of tank for your property. This calculation involves the land area of the property drainage coefficient filter efficiency and the yearly precipitation levels. All of these factors are used to determine the size of the tank needed for a respective property..

[Audio] Looking at the various elements for successful plumbing and drainage installation our last and essential element for this project is greywater recycling. Greywater is the wastewater generated from bathing laundry and other household activities. This water is relatively clean and can be reused safely for other purposes such as irrigating plants and flushing toilets allowing us to save a significant amount of water. Thank you for your attention and for taking the time to consider our proposal for this project..