Updated March 6th, 2018
A proper plumbing system is very much essential for the health of residents of a building. So, it is an unavoidable part of any building construction project.
The concept of the plumbing system is simple. That is, to supply fresh water and remove the wastewater.
Although the system is simple, we need a properly designed plumbing system. So that we don’t face any water related problem in future.
For this purpose, a plumbing engineer designs a plumbing system for a building even before starting the building construction.
In this post, I’ll discuss the must-have plumbing drawing sheets for a building construction project.
12 Must-Have Plumbing Drawing Sheets for a Building Project
Before starting the construction of a building, a set of plumbing drawings are given as a binding book.
In that book, a plumbing designer gives us a required set of drawings, which we actually need to properly install the plumbing system in a building.
To give you an overview, I’ll discuss the must-have plumbing drawing sheets and what should have in those drawing sheets below –
1. Index Sheet
This sheet contains a list of all the drawing sheets in a plumbing drawing book.
When we require a specific drawing sheet we just look at the index sheet and find the page number of our desired drawing sheet.
It is very useful like an index of a book containing many chapters.
If I don’t find any index sheet of the given Plumbing drawing book, I just prepare a handwritten Index sheet myself and attach that to the plumbing drawing book.
I found this very useful.
So, If you don’t find any index sheet of the plumbing drawing provided you for your building project, make an index sheet yourself and attach it to the plumbing drawing book. It’ll save you time in future.
Like any other index page, plumbing drawing index sheet should have the following things –
- Serial number
- Name of sheet titles inside the plumbing drawing book
- Page number of sheets in the plumbing drawing book
2. General Note Sheet
General note sheet is also a must-have in a plumbing drawing book.
When studying, you’ll find various symbols and short notes are used in the plumbing drawing to make you understand various things related to the plumbing system.
You will need to understand those symbols and short terms to fully understand the drawings.
For this purpose, a general note sheet is included in the plumbing drawing book explaining the various symbols and short terms used in the drawings.
Typically, a general note sheet of plumbing drawing contains the following things –
- Abbreviation for different short terms used in the drawings
- Symbol of various pipe shown in drawings.
- Symbol of various fixture
- Symbol of pipe fittings
- Special notes from the plumbing designer (If any)
Let’s discuss little bit about the above things –
Abbreviation for the different short terms:
In a plumbing drawing, you’ll find various short terms are used here and there. You will find the abbreviation for those short terms in General Note sheet. Some of the common short terms used in the plumbing drawing are –
UGWT – Underground Water Tank
OHWT – Over Head Water Tank
SP – Soil Pipe
WP – Waste Pipe
VP – Vent Pipe
SS – Soil Stack
WS – Waste Stack
RWP – Rainwater Pipe
HWP – Hot Water Pipe
CWP – Cold Water Pipe
FD – Floor Drain
FT – Floor Trap
IP – Inspection Pit
MP – Master Pit
GP – Gally Pit, etc.
Symbol of Various Pipe:
Different sizes of pipes are used for different plumbing fixtures.
When making a plan for water supply and drainage system, different color and thickness of lines are used in the plan to make it clear which pipe sizes are used for which plumbing fixtures.
These pipe symbols are summarized in the General Note sheet of a plumbing drawing. So that construction professionals can easily understand which symbol is used for which pipe sizes.
See the image below. I have taken this picture from a plumbing drawing. Typically, the pipe symbol looks like the image below.
Symbol of Various Sanitary Fixtures:
In a plumbing drawing book, you’ll find many symbols are used for displaying fixture location in bathrooms and kitchen.
In a General Note sheet of a plumbing drawing, a list of symbols is shown with the name of the fixture beside the symbol.
From the General Note sheet, you can quickly recognize which symbol is used for which sanitary fixture.
The list typically looks like the image below.
Symbol of pipe fittings:
There are many pipe fitting symbols are shown in the different plumbing drawing sheets.
The General Note sheet also shows a list of those symbols. So that, construction professionals can understand which symbol is used for which pipe fitting.
So, read the General Note sheet of the plumbing drawing book and memorize them. So that, you don’t need to come back to this sheet all the time when you are studying the various drawing sheets in the plumbing drawing book.
3. Water Supply Pipe Layout Plan
Water supply pipe layout is a drawing sheet of plumbing drawing book where water supply pipe diagram is shown.
This is also a must-have drawing sheet in a plumbing drawing book.
After completing masonry wall construction on a floor of a building, you can start the water supply piping work in bathrooms and kitchens.
When you go to start the water supply piping work in bathrooms and kitchens, you will need the following things –
- Sanitary fixture layout of bathrooms and kitchens
- Water supply pipe layout diagram
- Size of water supply pipes for different fixtures.
So, A water supply pipe layout plan should clearly state the above things. So that, you can do the water supply piping installation without having any problem.
The drawing sheet should contain the following things –
- How the sanitary and plumbing fixtures will be placed in bathrooms and kitchens. It is shown displaying fixture symbols on the drawing sheet.
- How the pipes will be connected to fixtures. It is shown by displaying single line diagram on the drawing.
- Duct location and how the water supply pipe will be connected to ducts.
If all the floors of a building are typical then you will need one sheet of Water Supply Pipe Layout Plan.
But this doesn’t normally happen.
There are various types of floors may have in a building. Such as commercial floor, parking floor, and residential floor, etc.
If that’s the situation, you will need different Water Supply Pipe Layout Plan for different floors.
So, A plumbing drawing book of a building should include those drawing sheets too.
4. Water Disposal Pipe Layout Plan
Water Disposal Pipe Layout Plan is a drawing sheet where drainage system of a floor is shown.
When you are going to start the drainage piping work on a building floor, you will need the following things –
- Placement of sanitary and plumbing fixtures
- Size of water disposal pipes for various sanitary fixtures.
- How the water disposal pipes are connected to the fixtures, etc.
So, a Water Disposal Pipe Layout Plan of a plumbing drawing book should have the following things on it.
- Clear visual placement of various sanitary fixtures.
- Single line diagram for drainage pipes with different colors. Different colors describe the different pipe sizes which normally listed on the General Note sheet as well as on the “Water disposal pipe layout plan”. Single line diagram shows how pipes run through the building’s floors.
- Duct location on the floor.
Like “Water Supply Pipe Layout Plan“, different drainage pipe layout sheets should be prepared for different floors of the building if the floors are not same.
5. Water Disposal Pipe Layout Plan at Ceiling
In a building, there are ducts all around the building. But, all ducts don’t come up to the ground.
Some ducts are diverted at ceiling level.
This normally happens on the ground floor ceiling. So, a plumbing drawing book should have a separate sheet for the drainage pipe layout at ceiling level.
This drawing sheet displays following things –
- Layout for diverted pipe run through the ceiling
- Size of pipes,
- Which duct will be diverted
- diverted ducts will go to which ducts, etc.
6. Roof Water Supply Distribution System
As water is distributed from the roof water reservoir to floors, water supply pipes from reservoir go through the ducts to different floors.
A drawing sheet for roof water supply system should be included in the plumbing drawing book.
This drawing sheet typically contain the following things –
- Location of roof water reservoir
- Single line diagram for different sizes of pipes run on the roof
- Location of ducts, etc.
7. Roof Rainwater Distribution System
In a plumbing drawing of a building, a separate drawing sheet should be included displaying roof rainwater distribution system. This drawing sheet typically displays following things –
- In which ducts rainwater will go through
- Which portion of a roof will cover which rainwater pipe?
- The slope direction of the roof, etc.
8. Vertical Water Disposal Stack Details
A vertical duct typically contains a wastewater stack, a soil stack, a vent stack, a rainwater stack.
A vertical water disposal stack details sheet should be included in the plumbing drawing book of a building.
This drawing sheet should show the following things –
- How stacks are connected to different floor
- Which size of pipes are used for different stacks
- Which fittings will be used for connecting sanitary fixtures with stacks
9. Vertical Water Supply Stack Details
Water is distributed from the roof water reservoir to bathrooms in various floors through vertical stacks. These vertical stacks are run through various ducts.
Bathrooms water supply systems are then connected to these vertical stacks.
A separate sheet should be included in the plumbing drawing displaying how the bathroom’s water supply system will be connected to the vertical water supply stack.
So, the drawing sheet should present the following things –
- Size of the pipes of various vertical water supply stack at different levels.
- Fittings used to connect to branch pipes.
- Where to use pressure reducing valve, etc.
10. Details of Water Supply Pipe Design
If we want to start water supply pipe installation inside the bathrooms, we need this drawing sheet.
This drawing sheet should typically display the following things –
- Size of pipes to use inside bathrooms
- Height of different water supply fixtures inside bathroom
- How the pipes will be connected to fixtures, etc.
11. Details of Water Reservoir Pipe Connection
A separate drawing sheet should be included in the plumbing drawing book of a building displaying details pipe connection with water reservoirs.
There are two water reservoirs used to control the water supply system of a building – one in underground and another in the roof.
This plumbing drawing sheet should show the details pipe connection for both water reservoir.
Typically following things are displayed on the sheet –
- Details piping connection to the overhead water tank.
- Details pipe connection to underground water tank
- Water pump connection details, etc.
12. Details of Septic Tank
For collecting liquid and solid from soil stacks, we need to make a septic tank.
A drawing sheet should be included in the plumbing drawing book of a building displaying the details connection of septic tank.
This drawing normally includes the following things –
- Plan of septic tank
- Details piping connection of septic tank, etc.
These are the must-have drawing sheet of a plumbing drawing book of a building.
Without any of the drawing sheets, I discussed above, you can’t install the plumbing system of a building.
There are some other drawing sheets can be included in a plumbing drawing book of a building. Such as duct plan, fixture location plan, etc. If you are a bit experienced, you can install plumbing system in a building without these drawing sheets.
Share Your Experiences
Do you want to include any drawing sheet to the must-have drawing sheet list of a plumbing drawing book of a building? Please share in the comments below…