Bathroom Plumbing Problems in Arundel and What to Do About Them

Published October 2026 | Bathroom Plumbing Problems and Solutions

You come downstairs one morning to find a damp patch spreading across the kitchen ceiling - directly below the bathroom. The tap upstairs has been dripping for weeks, the toilet takes an age to refill after flushing, and there's a faint smell around the base of the pan you've been putting off investigating. These aren't unusual situations in older West Sussex properties, and in a town like Arundel - where many homes date back several decades - bathroom plumbing problems have a habit of stacking up quietly before anyone joins the dots.

Understanding What's Actually Going On

Bathroom plumbing problems rarely come from nowhere. Most of what our engineers see day-to-day falls into a handful of recurring categories: dripping taps, slow drainage, running toilets, weeping joints, and low water pressure. The tricky part is that many develop gradually. It's easy to adapt to a slightly annoying toilet or a tap that needs an extra half-turn to stop dripping - right up until something fails more dramatically.

What looks like a simple drip can mean several different things: a worn washer, a degraded cartridge, a corroded valve seat, or even a crack in the pipework itself. Similarly, slow drainage might be a superficial blockage in the trap, or it could point to a partial obstruction further down the line. Getting the diagnosis right matters - treating the symptom without identifying the cause means it comes back.

The Most Common Causes of Bathroom Plumbing Problems

Worn Tap Washers and Cartridges

Dripping taps are one of the most common callouts our engineers see across Arundel and the surrounding West Sussex area. In traditional pillar taps, the culprit is usually a rubber washer that's worn flat or split with age. In modern mixer taps, it's more likely to be a ceramic disc cartridge that's failed or become contaminated with sediment. Either way, water continues to seep past the sealing surface when the tap is off. Left alone, a dripping tap wastes a surprising volume of water over weeks and months.

Blocked or Slow-Draining Pipes

Hair, soap scum, and toothpaste residue accumulate in the trap and waste pipe beneath basins, baths, and showers over time. The first sign is usually slower-than-normal drainage - water pooling slightly before it clears. In showers particularly, hair binds with soap to form a dense mat that builds up inside the trap body. Further down the system, debris can collect at bends in the pipework, making the problem recurring rather than one-off.

Leaking Toilet Cistern or Pan Base

Toilets develop leaks in a few distinct places. A cistern overflow running constantly typically means the fill valve float has failed, allowing water to rise above the overflow point. A leak at the base of the pan often points to a failed pan connector or a deteriorated seal. Internal leaks - where water trickles silently from the cistern into the pan without the toilet being flushed - are particularly easy to miss but add up significantly on your water bill if you're on a meter.

Low Water Pressure

Weak pressure in the bathroom can come from several different places depending on your property type. In older Arundel homes with gravity-fed systems, a partially closed isolation valve, a failing shower pump, or a limescale-blocked fitting are common explanations. In properties on mains pressure, the issue might be shared with neighbours - pointing to a supply issue from the street - or it might be down to a restrictor or scale-clogged shower head. It's worth checking whether the problem is isolated to one fixture or affects the whole bathroom, as that distinction usually narrows things down quickly.

Corrosion and Limescale Buildup

Many parts of West Sussex have moderately hard water, and over years of use, limescale deposits accumulate inside pipework, shower heads, tap aerators, and valve bodies. This restricts flow, increases wear on moving parts, and causes fittings to fail earlier than they otherwise would. In older properties with copper or iron pipework, internal corrosion is also a factor - particularly at joints and elbows where turbulence accelerates the process.

Weeping Joints and Loose Connections

Compression fittings can work loose over time, especially where there's regular temperature cycling - pipework expanding and contracting with use. A slightly weeping joint under a basin might go unnoticed for months until the chipboard starts to swell and deform. In concealed locations - inside stud walls or under suspended floors - a slow joint leak can cause significant damage before it becomes visible at the surface.

Solutions That Actually Work

Some bathroom plumbing fixes are well within reach for a careful homeowner. Others need a qualified plumber, either because of the complexity involved or because getting it wrong risks making things considerably worse. Here's how to work through the most common problems.

For a dripping tap:

1. Turn off the water supply - either at the isolation valve under the basin, or at the main stopcock if there isn't one.
2. Remove the tap handle (usually a small screw hidden under a decorative cap).
3. Unscrew the headwork or cartridge using an adjustable spanner.
4. Replace the washer or cartridge like-for-like. Take the old part to the merchant if you're unsure of the size - most will match it for you.
5. Reassemble, restore supply, and test carefully before leaving it unattended.

For a slow drain:

1. Try a drain plunger first - often effective for soft blockages near the trap.
2. Remove and clean the trap manually, with a bucket in place to catch the water it holds.
3. For shower wastes, a flexible drain snake or purpose-made hair removal tool will reach blockages in the trap body without needing to disassemble anything.
4. Use chemical drain cleaners sparingly - they work on organic matter but can degrade older plastic fittings and don't address the underlying buildup pattern.

For a running toilet:

1. Lift the cistern lid and check whether water is reaching the overflow pipe level. If so, the fill valve float needs adjusting or replacing.
2. Check whether water is trickling into the pan without flushing. Drop some food colouring into the cistern and wait a few minutes - if colour appears in the pan, the flapper or flush valve seal needs replacing.
3. Both repairs use parts available from most builders merchants for a few pounds, and the cistern mechanism is designed to be swapped out without specialist tools.

The Voltrade GoFIX diagnostic tool is useful at the "what am I actually dealing with?" stage - it works through your symptoms systematically to suggest likely causes and whether you need a professional visit or can address it yourself.

When You Need a Professional and When You Don't

A useful working rule: if the repair requires isolating a section of pipework, working inside walls or floors, or touching anything connected to the mains supply or heating circuit, bring in a qualified plumber. Mistakes in those areas can cause water damage that costs considerably more to put right than the original repair would have.

You're likely fine to attempt it yourself if you're dealing with:

• A tap washer or cartridge replacement on an accessible fitting
• Clearing a trap or surface blockage in a basin, bath, or shower
• Adjusting or replacing a toilet fill valve or flush valve inside an accessible cistern
• Descaling a shower head (soak it overnight in white vinegar and rinse thoroughly)

Get a professional in for:

• Any leak from a concealed pipe or joint inside a wall or floor
• Visible water damage - staining on ceilings, soft plasterboard, unexplained mould growth
• Lead pipework, which is still found in some older Arundel properties built before the 1970s and is worth replacing on supply lines for health reasons
• Low pressure affecting multiple fixtures where the cause isn't obvious
• A repair you've already attempted that has returned or worsened

Emergency situations - a burst pipe, significant active leak, or sewage backing up - need immediate professional attention. Local 24-hour plumbing services in Arundel cover these kinds of urgent callouts.

What to Expect from a Repair Visit

When a plumber visits a bathroom job in Arundel, the visit typically follows a predictable pattern. They'll start by asking about the symptoms - how long they've been occurring, whether anything triggered them, whether they're getting worse. That initial conversation helps narrow down the likely cause before any investigation begins.

They'll then inspect the relevant fixtures, check isolation valves, and look at related areas - under the basin for signs of previous leaks even if the current issue is the shower, for instance. This wider check often catches secondary problems that would otherwise become their own callout down the line.

For a standard repair - replacing a tap cartridge, fitting a new fill valve, resealing a pan connector - you're typically looking at a job that takes between 45 minutes and two hours once parts are to hand. Plumbing services in Arundel can range from around 365 to 794 pounds for more involved work, though a single standard repair will typically come in well below the upper end of that range. Always ask for a breakdown of call-out fee, labour rate, and expected parts cost before work begins - a clear contractor will give you these without hesitation.

For more complex situations - concealed leaks, low pressure investigations, or replumbing a section of pipework - a good tradesperson will explain what they've found and talk you through options before committing to a course of action. If someone wants to start opening walls before they've explained what they expect to find, that's worth pushing back on.

Common Questions from Arundel Homeowners

Why does my toilet keep running after I've flushed?

A continuously running toilet is almost always one of two things: a fill valve that can't shut off the water supply once the cistern is full, or a worn flapper valve leaking water slowly from the cistern into the pan. Both parts are inexpensive - a few pounds each from a plumbers merchant - and replacing them is within reach for most homeowners. If you'd rather not work inside the cistern, a plumber can typically resolve this in under an hour as a standalone job.

What causes low water pressure in my bathroom when the rest of the house seems fine?

When low pressure is isolated to one bathroom, the most common explanations are a partially closed isolation valve on the supply to that room, a limescale-blocked shower head or tap aerator, or a failing shower pump if your system is gravity-fed. Start by removing and soaking the shower head in white vinegar overnight. If that doesn't help, an engineer can check isolation valves and test pump performance with a pressure gauge to identify where the restriction is occurring.

How can I tell if I've got a concealed pipe leak inside a wall?

Signs of a concealed leak include unexplained damp patches on walls or ceilings, soft or discoloured plasterboard, a musty smell that doesn't clear with ventilation, and an unexplained rise in water usage if you're on a meter. In older West Sussex properties where pipework runs inside wall chases, these leaks can go undetected for a long time. An engineer can use a moisture meter to map affected areas before committing to opening up any surfaces, which saves unnecessary damage and cost.

Should I be worried about old pipework in my Arundel home?

Older copper pipe in good condition is generally reliable and can last for many decades without trouble. The main concern in properties built before the 1970s is lead supply pipework - if it's still carrying your drinking water supply, replacing it is worth doing. If you're unsure what your pipework is made from, a plumber can identify it quickly during any visit and give you an honest view of whether it needs attention or can be left alone.