After constructing masonry wall on a floor we go for installing water supply lines in bathrooms and kitchens.
If you work on a building construction project, you already know that before fixing wall tiles you need to install water supply lines in bathrooms and kitchens.
Installing water supply lines in a bathroom is easy.
I will show you, how to install them easily in bathrooms in this post.
Let’s first see what are water supply lines?
What are Water Supply Lines in a Bathroom?
When it comes to plumbing in a building construction project, we see two things. Those are, to supply fresh water into the building and removing wastewater from the building.
Water supply lines are installed for the purpose of supplying fresh water into the building.
In a bathroom, water supply line means connecting plumbing fixtures with the main water distribution line of the building with pipes. So that, water can reach to various plumbing fixtures of a bathroom.
So, water supply lines in a bathroom are those pipes which carry the water from main distribution line to various plumbing fixtures.
Now we will see, what things we need to consider to install water supply lines in a bathroom.
Things to Consider Before Installing Water Supply Lines in a Bathroom
When you plan to install water supply lines in a bathroom you’ll need the following things even before starting the work –
- Type of plumbing fixtures
- Location of plumbing fixtures
- Hot or cold water line or both
- Which type of pipes will be used in the bathroom
Let’s discuss these things a little bit.
Type of Plumbing Fixtures:
Which plumbing fixtures will you install in the bathroom?
Will you provide basin in the bathroom?
Will you provide shower tray or bathtub or only shower mixture?
Will you provide commode in the bathroom? If you provide commode then which type of commode, high commode or long pan?
Clear the decision which plumbing fixtures you will provide in the bathroom. Because water supply line installation depends on the type of plumbing fixtures used in the bathroom.
Typical plumbing fixtures in a bathroom are –
- A high commode or a long pan
- A shower mixture, and
- A cabinet basin or a pedestal basin
Location of Plumbing Fixtures:
Which plumbing fixture will be on which wall of the bathroom?
You need to get this decision before installing water supply line in a bathroom.
Plumbing drawings contain a drawing sheet called “Plumbing fixture layout plan”. You will get the location of various plumbing fixtures on that drawing sheet.
If the plumbing drawings of the building don’t have a “plumbing fixture layout plan”, there must be a drawing called “Water supply layout plan”.
You can get the location of various plumbing fixtures from that drawing too.
Hot and Cold Water Line or Both:
Both hot and cold water supply is common practice nowadays.
But, sometimes only cold water supply is the only option.
Take this decision first that which water supply line you are going to install in the bathroom – only cold or hot and cold both?
Types of Water Supply Pipes to Be Used in The Bathroom:
Which type of pipe will you use in the bathroom for water supply purpose?
Commonly used water supply pipes in a bathroom are PPR or GI.
But, in the modern residential building PPR is mostly using water supply pipes.
Okay. Now we know what should be in our bathroom in terms of water supply purpose. Now, let’s start installing water supply pipelines in the bathroom.
How to Install Water Supply Lines in a Bathroom?
As you know from the above discussion, how you will install water supply pipes depend on the plumbing fixtures you choose to install in the bathroom.
For the sake of our tutorial, we will fix following plumbing fixtures and facilities in the bathroom –
- High commode
- Shower mixture
- Cabinet basin
- Both hot and cold water supply facility, and
- PPR pipe and fittings
Water supply lines are installed in three steps –
Step 1: Marking the pipelines in wall
Step 2: Groove cutting in wall
Step 3: Installing pipelines in wall
Step 1: Marking The Pipelines in Walls
The first step of installing water supply line is to mark the lines on the wall with a chalk pencil or a marking pen.
So let’s start marking water supply lines on walls.
Not all the plumbing fixtures will be on the same wall.
For example, we have a high commode on a wall. shower mixture and basin on a separate wall.
Now we will see, how to mark the pipelines for this plumbing fixture on walls.
Marking Water Supply Lines for a High Commode on a Wall
There will be two water supply points for a high commode. One for Push shower (hand shower) and another for the Flash tank.
We normally keep push shower point 14” above from finished floor level and flash tank point is at 9” from finished floor level.
As you didn’t lay tiles on bathroom’s floor yet, so points hight should be calculated from the unfinished floor.
In that case, points hight from unfinished floor will be –
For push shower: 16”
For the flash tank: 11”
I assumed floor height will be increased 2 inches after tiles work.
Draw a pipeline on the wall where Commode will be installed.
Hot water supply is normally not installed for a Commode. so, you need to draw a single pipeline.
Marking Water Supply Lines for Shower Mixture on the Wall
As we are giving both hot and cold water facility in the bathroom, we need to mark two pipelines for the shower mixture. One is for hot water supply and another is for normal water supply.
We normally keep the shower mixture point height 42 inches from the finished floor. So, from the unfinished floor, this height should be 44 inches.
Draw two vertical line on the wall from false ceiling up to 44 inches above from the unfinished floor.
Marking Water Supply Lines for Cabinet Basin:
Cabinet basin point should be left 21 inches above the unfinished floor level.
So, draw two parallel lines in the wall for hot and cold water supply lines for the cabinet basin on the wall where Cabinet basin will be installed.
Okay. We have finished the water supply lines marking on a bathroom’s walls. We will now make grooves on walls as the lines drawn for installing water supply lines.
Step 2: Groove Cutting for Water Supply Lines
After marking water supply lines, we now need to cut grooves in the walls for installing pipes.
We normally use ½ inch dia PPR pipes for water supply line of a bathroom. So, the depth of grooves should not be more than ½ inch and the width of grooves as required for fixing a ½ dia pipe.
Use a grinding machine to cut the groove and make grooves on walls through the lines drawn in step 1.
Step 3: Installing Water Supply Pipes in a Bathroom
As we are using PPR pipes for water supply lines, we will need a PPR heater for joining fittings and pipes.
Join the PPR pipes using elbows to run the pipe through the groove.
Fix a female elbow at one end of PPR pipes to connect with plumbing fixtures and leave the other end of the pipes above the false slab to connect with vertical water supply line.
Installing water supply lines in a bathroom is easy.
The mechanism of water supply lines in a bathroom is just to take the water from the vertical water supply pipe to the plumbing fixtures.
You just need to take care of the female elbow height at the end of the water supply line. This height should be accurate. Otherwise, you’ll face problem installing plumbing fixtures later.
Share Your Expertise
Which height do you keep for shower, commode, and basin? Please share in the comments below…