How to Increase Water Pressure in Your Home

How to Increase Water Pressure in Your Home

Few things are more frustrating than stepping into the shower and being greeted by a feeble trickle of water, or waiting an eternity for the bath to fill. Low water pressure is a common complaint in homes across Essex and East London, and it can affect everything from your morning shower to how efficiently your boiler and appliances work.

The good news is that most water pressure problems can be diagnosed and resolved. In this guide, we explain the common causes of low water pressure and walk you through both DIY fixes and professional solutions.

Understanding Water Pressure

Before diving into solutions, it helps to understand the basics. Water pressure is measured in bar, and in the UK, the minimum mains water pressure that your water company is required to deliver to your property boundary is 1 bar (equivalent to 10 metres head). In practice, most Essex homes receive between 1 and 3 bar from the mains.

However, the pressure at your taps depends on several factors beyond just the mains supply — your internal plumbing, the type of system you have, and the condition of your pipework all play a role.

You can measure your water pressure using a simple pressure gauge that attaches to an outside tap. These are available for around £10 from hardware shops and give you an instant reading.

Common Causes of Low Water Pressure

1. Your Water Supply Type

The type of plumbing system in your home has a fundamental impact on water pressure:

• Mains-fed systems (combi boilers): Water comes directly from the mains to your taps and boiler. Pressure is generally better but depends on mains supply.
• Gravity-fed systems (traditional with cold water tank in loft): Hot water pressure depends on the height of the cold water tank above the taps. In a typical two-storey Essex home, this gives around 0.3-0.5 bar — considerably less than mains pressure. Cold taps are usually mains-fed and have better pressure.

If you have a gravity-fed system and are unhappy with the hot water pressure, converting to a mains-fed system (such as a combi boiler or unvented cylinder) is often the most effective long-term solution.

2. Partially Closed Valves

This is surprisingly common and is one of the easiest things to check. Your home has several valves that control water flow:

• Main stopcock: Should be fully open (turned anti-clockwise as far as it will go)
• Service valve (at the water meter outside): Should be fully open
• Isolation valves on individual appliances: Check under sinks, behind toilets, and on boiler connections

Valves can be accidentally knocked, especially under the kitchen sink. A stopcock that is only half-open will significantly restrict flow throughout the house.

3. Clogged or Corroded Pipes

In older Essex homes — particularly those with original galvanised steel or iron pipework — the inside of the pipes can become heavily corroded and restricted over decades. The bore of a 15mm pipe can reduce to just a few millimetres, severely limiting flow.

Similarly, the hard water in Essex causes limescale build-up inside pipes and fittings, gradually restricting flow. This is particularly noticeable on hot water pipes where the scale deposits faster.

• Pressure is poor throughout the house, not just at one tap
• Pressure has been declining gradually over years
• The property has old galvanised or iron pipework
• You can see scale deposits at tap outlets

The solution is to repipe the affected sections with modern copper or plastic (Speedfit/Hep2O) pipework. While this is a significant investment, it solves the problem permanently.

4. Faulty Pressure Reducing Valve (PRV)

Many properties have a pressure reducing valve fitted where the mains supply enters the house. This is designed to reduce high mains pressure to a safe level for your internal plumbing (usually set to 3 bar).

If the PRV fails, it can restrict pressure excessively. You can identify it as a bell-shaped or cylindrical brass fitting on your main supply pipe, often near the stopcock. PRVs can be adjusted (some have a screw on top) or replaced if faulty. This is a job for a qualified plumber as incorrect adjustment can cause dangerously high pressure.

5. Shared Supply Pipes

In some older Essex streets, multiple properties share a single supply pipe from the water main. When your neighbours are using water at the same time — particularly during morning and evening peak times — your pressure drops. This is especially common in terraced houses and older semi-detached properties.

If you suspect a shared supply, contact your water company (Affinity Water or Essex & Suffolk Water, depending on your area). They may be able to install a dedicated supply to your property, often at no charge for the external works.

6. Water Company Issues

Sometimes the problem is not within your property at all. Mains water pressure can be affected by:

• Burst mains in your area
• Planned maintenance work
• High demand periods (hot summer days when everyone waters their garden)
• Your position on the network (properties at the end of a supply run or at the top of a hill naturally receive lower pressure)

Check your water company's website for known issues in your area before investigating your own plumbing.

DIY Fixes You Can Try

Clean Your Tap Aerators

Most modern taps have a small mesh filter (aerator) at the spout. Over time, these can become clogged with limescale and debris, restricting flow. Unscrew the aerator (usually by hand or with pliers wrapped in a cloth), soak it in white vinegar for a few hours, and refit it.

Clean Your Shower Head

Similarly, limescale-clogged shower heads are a common cause of poor shower pressure. Remove the shower head and soak it in a descaling solution or white vinegar overnight. Use a pin to clear any remaining blocked holes.

Check for Leaks

A hidden leak in your plumbing system can reduce overall pressure. To check, turn off all taps and water-using appliances, then watch your water meter. If the dial is still moving, you have a leak somewhere. Even a small dripping overflow or weeping radiator valve can affect pressure.

Bleed Your Radiators

If your boiler pressure keeps dropping, air in the heating system could be the cause. Bleed all radiators starting from the ground floor and working up. After bleeding, check the boiler pressure gauge and top up via the filling loop if it has dropped below 1 bar.

Professional Solutions

Install a Booster Pump

For homes with consistently low mains pressure, a booster pump can make a dramatic difference. These pump systems sit on the mains supply and boost the pressure to your desired level. A quality single-pump system costs between £300 and £600 fitted.

For gravity-fed systems, a shower pump (such as a Salamander or Stuart Turner) can be fitted to boost hot and cold pressure to the shower. These cost £200-£500 fitted and transform the shower experience.

Convert to an Unvented Hot Water System

If you have a gravity-fed system and want mains-pressure hot water without switching to a combi boiler, an unvented hot water cylinder (such as a Megaflo or Heatrae Sadia) is an excellent option. These store hot water at mains pressure, giving you powerful showers and fast-filling baths.

Conversion costs £1,500-£3,000 including the cylinder, installation, and required safety devices. The cylinder must be installed by a G3-qualified engineer.

Repipe Your Home

If old pipework is the root cause, partial or full repiping is the definitive solution. Modern 15mm and 22mm copper or plastic pipes deliver far better flow rates than corroded old pipework. The cost depends on the extent of work but typically ranges from £1,000 to £4,000 for a standard Essex home.

When to Call a Professional

While some pressure issues have simple DIY fixes, others require professional diagnosis and repair. Call a plumber if:

• Pressure has dropped suddenly (could indicate a burst pipe)
• You suspect a PRV fault
• You want to install a booster pump or convert your system
• Old pipework needs replacing
• You have tried the DIY fixes above with no improvement

At DJ's Plumbing Services, we diagnose and resolve water pressure problems across Essex and East London every week. We can quickly identify the root cause of your pressure issues and recommend the most cost-effective solution.

Call us on 07502 225764 for a diagnostic visit. We will test your pressure, inspect your system, and give you clear options to get your water flowing properly.