Choosing the right water pipe is an important part of any new water supply, replacement pipework or groundworks project. The correct pipe needs to be suitable for the application, installation conditions, required pressure and the connection system being used.
At AJ Gammond, we supply a range of water pipe products for domestic, agricultural, building, plumbing and groundworks applications, including MDPE blue pipe, PE100 pipe and barrier pipe.
This guide explains the main types of water pipe, where they are commonly used and what to consider before purchasing.
What Is Water Pipe?
Water pipe is used to transport water from a supply point to its destination. Depending on the application, water pipe can be installed underground or above ground and may be manufactured from different materials and to different pressure ratings.
For underground water supplies, polyethylene pipe is a popular choice because it is flexible, durable and available in long coils, helping to reduce the number of joints required during installation.
However, not every pipe is suitable for every application. Always check the manufacturer’s specifications and relevant installation requirements before purchasing.
Types of Water Pipe
There are several types of water pipe available, with the correct option depending on the intended use.
MDPE Blue Water Pipe
MDPE blue pipe is widely used for underground potable water supply installations.
Its flexibility makes it particularly useful for routing water supplies around buildings, gardens, agricultural properties and other sites.
AJ Gammond supplies MDPE blue pipe in a range of diameters and coil lengths, allowing customers to select a suitable option for their project.
Typical applications include:
- Underground domestic water supplies
- Agricultural water supplies
- New-build projects
- Replacement water supply pipework
- Building and groundworks
- Water connections to outbuildings and other structures
When purchasing MDPE pipe, make sure you select the correct diameter and length for your installation.
PE100 Black Pipe
PE100 polyethylene pipe is another option for water and groundworks applications.
PE100 refers to the grade of polyethylene material used to manufacture the pipe. PE100 pipe is known for its durability and suitability for a range of pressure applications.
AJ Gammond stocks selected black PE100 pipe, including SDR11 options.
Before ordering, always check the pipe’s specification and ensure that it is suitable for your intended application.
Barrier Pipe
Barrier pipe is designed to provide additional protection where there is a risk that contaminants in the surrounding ground could affect the water supply.
Products such as Protecta-Line Barrier Pipe are specialist solutions designed for particular installation conditions.
Barrier pipe can be an important consideration for certain sites, so customers should establish whether a standard MDPE pipe or a barrier pipe system is required before purchasing.
What Size Water Pipe Do I Need?
The correct pipe diameter depends on the application and the requirements of the water supply system.
Common considerations include:
- Required flow rate
- Length of the pipe run
- Available water pressure
- Number of outlets
- Building or property requirements
- Connection sizes
- Installation conditions
- Pressure rating
A larger pipe does not automatically mean a better installation. The pipe needs to be appropriately sized for the system.
If you are unsure which diameter you require, speak to your plumber, installer or relevant water professional before ordering.
How Long Should My Water Pipe Be?
Water pipe is commonly sold in coils, with longer lengths allowing installations to be completed with fewer joints.
AJ Gammond supplies water pipe in a selection of lengths, including 25m, 50m, 100m and 150m options depending on the product.
Before ordering, measure the proposed pipe route carefully and allow for the route around buildings, connection points and any additional length required for installation.
It is generally better to establish the required length before ordering rather than joining multiple shorter lengths unnecessarily.
MDPE Water Pipe for Domestic Properties
MDPE blue pipe is commonly used for underground water supplies to homes and other buildings.
For a domestic installation, the pipe may run from the incoming water connection to the property and then connect into the internal plumbing system.
The exact requirements will depend on the property, existing supply and installation method.
For new installations or replacement supplies, always check the requirements of the relevant water supplier and use a suitably qualified installer where appropriate.
Water Pipe for Agricultural Applications
Water pipe is also widely used around farms and agricultural properties.
Applications can include supplying:
- Livestock water troughs
- Agricultural buildings
- Outbuildings
- Workshops
- Remote water points
- Irrigation systems
- Other agricultural installations
For agricultural projects, the required pipe size will depend on the number of outlets, required flow rate, distance and available water pressure.
AJ Gammond also supplies water troughs, water fittings and associated agricultural products, allowing customers to source multiple components for their project.
Water Pipe Fittings
Pipe is only part of the installation. You may also require suitable fittings to connect the pipe to existing plumbing, valves, tanks, troughs or other equipment.
Depending on the installation, products may include:
- MDPE fittings
- Compression fittings
- Couplers
- Elbows
- Tees
- Adaptors
- Stop taps
- Valves
- Pipe clips
Always make sure that fittings are compatible with the pipe diameter and application.
What Should I Consider Before Buying Water Pipe?
Before placing your order, consider the following:
1. What is the pipe being used for?
Determine whether it is for domestic water supply, agriculture, irrigation, machinery or another application.
2. What diameter do you need?
The diameter should be selected based on the requirements of the installation rather than simply choosing the largest available pipe.
3. How much pipe do you need?
Measure the complete route and select a coil length that minimises unnecessary joints.
4. Do you need standard MDPE or barrier pipe?
If there is a potential contamination risk at the installation site, a specialist barrier pipe may be required.
5. What fittings are required?
Check the connection sizes at both ends of the installation before purchasing.
6. Is the pipe suitable for the pressure and application?
Always check the manufacturer’s technical specifications before installation.
Frequently Asked Questions
Can MDPE pipe be used underground?
Yes. MDPE pipe is commonly used for underground water supply installations, provided the selected product is suitable for the intended application and installed correctly.
What colour is water supply MDPE pipe?
Blue MDPE is commonly used to identify potable water supply pipework.
Is PE100 pipe suitable for water?
PE100 pipe can be used for suitable water applications, but the exact product specification should always be checked before installation.
What is barrier pipe?
Barrier pipe is a specialist pipe designed to provide additional protection against certain contaminants in the surrounding ground.
What size water pipe should I use?
The required diameter depends on factors such as flow rate, pipe length, water pressure and the number of outlets. Your installer or water professional can help determine the appropriate size.
How much water pipe should I buy?
Measure the complete proposed route and select a suitable coil length. Allow enough pipe for connections and installation.
Shop Water Pipe at AJ Gammond
AJ Gammond supplies a range of water pipe and associated products for domestic, agricultural, building and groundworks applications.
Browse our range of:
Black PE100 Pipe for water drainage and plumbing
Black PE100 Pipe for water drainage and plumbing.
Philmac Water Pipe Fittings Water Pipe Fittings
Whether you’re replacing an existing water supply, installing pipework for a new property or supplying water to an agricultural building or trough, AJ Gammond can help you find the products required for your project.
Need help choosing? If you’re unsure which pipe, diameter, length or fitting you require, contact the AJ Gammond team before ordering.
AJ Gammond – Trade, Agricultural & Building Supplies
From water pipe and drainage products to tools, agricultural equipment, building materials and workshop supplies, AJ Gammond supplies products for trade, agriculture, industry and DIY customers across the UK.