Pipe installation

Modern plumbing systems in the UK must balance water pressure, temperature control, and efficiency. Investing in high-quality pipework not only improves your home's performance but also ensures compliance with strict national water and building regulations.

What Does the Work Involve?

• Site Survey: Assessing the existing system, identifying the best routing, and locating the main stopcock and isolation points.
• Material Selection: Choosing between traditional copper (durable and antibacterial) or modern PEX/plastic (flexible and cost-effective) based on the application.
• Routing and Chasing: Lifting floorboards or cutting "chases" into walls to conceal pipework where necessary.
• Installation: Cutting, deburring, and joining pipes using soldering, compression fittings, or push-fit technology.
• Pressure Testing: Running the system at high pressure to identify and rectify any "weeping" joints or minor leaks before sealing walls or floors.
• Insulation and Lagging: Applying foam lagging to pipes in unheated areas (like lofts) to prevent freezing and heat loss.
• Making Good: Filling small holes or chases, though decorative plastering and painting are usually quoted as extras.

Typical Costs

The cost of pipe installation varies significantly based on the material used and how difficult it is to access the run. Copper remains more expensive than plastic due to global commodity prices and the labour-intensive nature of soldering joints.

Prices generally include VAT at 20%. Factors that will push costs toward the "High" end include concealed pipework under tiled floors, the need for scaffolding, or the removal of hazardous materials like old asbestos-lagging.

How Long Does It Take?

• Emergency leak repair: 1–3 hours depending on access.
• Single appliance pipe run: 3–5 hours including testing.
• Relocating a radiator or sink: 1 full day.
• Full domestic repipe: 5–10 working days, often requiring the property to be vacant.

DIY or Professional?

While basic push-fit plastic plumbing is marketed to DIYers, professional installation is strongly recommended for any permanent pipework. A single failed joint behind a wall can cause thousands of pounds in structural damage before it is even noticed.

Note: Any work involving gas pipes must, by law, be carried out by a Gas Safe registered engineer. For water, using a WaterSafe recognised plumber ensures the work meets the Water Supply (Water Fittings) Regulations.

Choosing the Right Tradesperson

• Check Credentials: Look for NVQ Level 2/3 in Plumbing and Heating and WaterSafe or CIPHE membership.
• Insurance: Ensure they hold Public Liability Insurance (minimum £2 million) to cover potential water damage.
• Red Flags: Be wary of anyone who refuses to pressure test the system or suggests "burying" joints in concrete without protection.

Questions to ask your plumber:

• Are you WaterSafe registered and do you provide a compliance certificate?
• Do you recommend copper or plastic for this specific job, and why?
• Does your quote include "making good" the walls and floors?
• What is the duration of your workmanship guarantee?

UK Regulations

• Water Supply (Water Fittings) Regulations 1999: Ensures the system prevents contamination and waste of water.
• Building Regulations Part G: Covers sanitation, hot water safety, and water efficiency.
• Building Regulations Part L: Dictates the insulation requirements for hot water pipes to conserve energy.
• Notification: Large-scale changes to the plumbing system may require notification to your local water supplier.

Common Problems

• Water Hammer: Loud banging noises caused by pipes that aren't secured properly with clips.
• Electrolysis: Corrosion that occurs when copper pipes are joined directly to galvanised steel without a dielectric union.
• Dead Legs: Lengths of pipework leading to nowhere that can harbour Legionella bacteria; these must be removed, not just capped.
• Inadequate Lagging: Pipes in lofts or external walls bursting during the first winter freeze due to lack of insulation.

Frequently Asked Questions

Is plastic pipe as good as copper?

Modern PEX and polybutylene pipes are excellent for long runs as they are flexible and have fewer joints. However, copper is still preferred for exposed areas because it looks better, is more rigid, and has natural antibacterial properties.

Why do my pipes make a whistling sound?

This is often caused by high water pressure or a partially closed valve. A plumber can install a pressure-reducing valve (PRV) or replace the faulty component to silence the system.

Do I need to notify my water company about new pipes?

For most minor internal works, no. However, for significant alterations, new builds, or large extensions, you or your plumber may need to submit a "Regulation 5" notification to the local water authority.

How can I tell if my old pipes are lead?

Lead pipes are dull grey and soft. If you scrape the surface with a coin, the metal underneath will be shiny and silver. Lead pipes should be replaced immediately for health reasons.

Will a repipe ruin my decor?

Repiping is invasive. It usually involves lifting carpets, floorboards, and potentially cutting into plasterboard. A good plumber will minimize damage, but you should budget for some redecorating once the work is finished.