What to Do If You Have Low Water Pressure

Ever stood in the shower expecting a powerful blast—only to be greeted by a feeble trickle? Low water pressure isn’t just annoying—it can be a sign that something’s wrong with your plumbing.

At 1st Clearflow, we’re often called out to homes and businesses across Sussex dealing with frustrating pressure issues. Here’s a breakdown of what might be causing it, what you can do about it, and when it’s time to call in the pros.

What Causes Low Water Pressure?

1. Clogged or Corroded Pipes

In older homes, internal pipework may have narrowed due to years of mineral deposits, limescale, or internal corrosion. This can seriously restrict water flow and reduce pressure at the outlet. Even a small build-up can have a big effect—especially on upper floors.

Symptoms: Reduced flow at multiple taps, especially hot water.
What to do: Call a professional to assess whether descaling, pipe replacement, or system flushing is needed.

2. Hidden Leaks

A leak anywhere in your system can reduce pressure. Because the water escapes before reaching your taps, you’ll experience weak flow—and possibly notice damp patches, higher water bills, or mould around walls or floors.

Symptoms: Unexplained drops in pressure, visible water damage, or a constantly running water meter.
What to do: Turn off all taps and check if your water meter is still spinning. If it is, you likely have a leak.

3. Faulty Taps or Shower Heads

Sometimes the issue is with the fixture itself. Old or cheap fittings can have blocked aerators, faulty cartridges, or limescale that chokes the flow—even when the rest of the system is fine.

Symptoms: Low pressure from just one tap or shower, others working normally.
What to do: Unscrew the tap aerator or shower head and clean it with white vinegar to remove scale. If still poor, it may need replacing.

4. Partially Closed Valves

If your internal stopcock (usually under the kitchen sink) or external mains valve isn’t fully open, it can restrict flow to your whole property. This often happens after maintenance work and can go unnoticed.

Symptoms: Sudden drop in pressure after plumbing work, pressure low throughout property.
What to do: Locate your stopcock and ensure it’s turned fully anti-clockwise. If you’re unsure, we can inspect and test it for you.

5. Problems with the Water Supplier

Occasionally, the issue isn’t inside your home at all. Your local water authority might be doing essential maintenance, experiencing supply issues, or dealing with a burst main—which can temporarily affect pressure in your area.

Symptoms: Neighbours also experiencing low pressure.
What to do: Visit your supplier’s website or call them to check for updates. If the issue persists after they confirm all is clear, the problem is likely internal.

6. Shared Supply or Old Pipe Infrastructure

If your property shares a water main with others (common in terraces or older homes), pressure can dip when others nearby are using water at the same time—e.g. morning or evening peak hours.

Symptoms: Pressure fine at some times, drops at others (especially evenings or weekends).
What to do: We can assess whether you’re on a shared main and recommend solutions like upgrading to an independent supply or installing a booster pump.

Step-by-Step: How to Diagnose Low Water Pressure at Home

• Check multiple taps – Is the pressure low everywhere, or just in one room?
• Clean tap heads and shower heads – Unscrew, soak in vinegar, and scrub gently.
• Inspect for leaks – Look under sinks, around appliances, and along visible pipework.
• Check stopcock and valves – Ensure everything is fully open.
• Ask your neighbours – This helps rule out external issues with the supplier.
• Contact a professional – If the issue isn’t obvious, let us do a full pressure test and system inspection.

How We Can Help

At 1st Clearflow, we offer expert diagnosis and repair for all types of water pressure problems. Whether it’s an internal blockage, faulty valve, ageing pipes, or a more complex supply issue—we’ll find the cause and fix it fast.

Our engineers are:

• Fully qualified and insured
• Available for emergency call-outs
• Equipped to test pressure, inspect pipework, and carry out repairs or upgrades on the spot

Don’t put up with weak water pressure. Call 1st Clearflow on 01903 238812 for a fast, friendly and professional service.