Mawdsleys Pump Services provides water booster pump repair, service and maintenance for domestic, commercial and industrial clients across Bristol, Bath, Cardiff and the wider South West and South Wales region.
Whether your pressure pump has failed without warning, is running continuously, or you need a planned booster pump service to prevent a future breakdown, our in-house engineers are available 24/7, 365 days a year. Most booster pump repairs are completed on-site in a single visit. Where a pump requires workshop overhaul, we manage the process from our Bristol base and minimise your downtime throughout.
If you are interested in any of the above, give us a call, and we can advise you over the phone or attend ASAP. Our emergency breakdown service is available 24/7, 365 days a year.
Speed of Service
When your pump fails, you need action—not promises. That’s why we respond fast, and fix it faster.
24/7 Support
Your pump doesn’t care what time it is when it breaks down. Neither do we. We operate 365 days a year.
Stellar on Google
Don't take what we say for granted. Check our Google Reviews for confirmation of the quality we bring.
Precise Communication
Our specialists will give you the full picture and keep you in the loop every step of the way.
Accreditations
Local coverage
We provide pump services to the South West and South Wales:
Bristol, Cardiff, Newport, Bath, Cheltenham, Gloucester, Weston-super-Mare, Bridgewater, Thornton, Exeter, Salisbury, Southampton, Reading, Swindon, Slough, Oxford, Basingstoke, Newbury, Worcester, Hereford, Yeovil
2. Water Pressure Pump Failure — No Output
If the pump appears to be running but water pressure has dropped to zero or near zero, the most likely causes are a failed non-return valve, a burst internal seal, or a worn impeller. In older booster sets, limescale buildup on the impeller progressively reduces output until pressure falls below a usable threshold.
This type of pressure pump failure tends to develop gradually — pressure drops slowly over weeks or months before reaching a point where it becomes noticeable. A booster pump service visit would typically identify impeller wear before it leads to full pressure loss.
3. Pump Running Continuously
A booster pump that runs without stopping is usually caused by a faulty pressure switch or a system leak that prevents the pump from building up to its cut-off pressure. Running continuously without cutting out accelerates motor wear and increases energy consumption significantly.
If your pump is running but you have adequate water pressure, check for visible leaks at pipework joints. If there are none, the pressure switch is the most likely fault. Call our engineers — this is one of the most common booster pump repairs we attend.
4. Excessive Noise or Vibration
Noise and vibration from a booster pump typically indicate one of three things: loose pipework fixings allowing pipes to vibrate against walls or brackets; cavitation (the pump drawing in air rather than water, usually due to insufficient incoming pressure); or a worn bearing within the pump motor.
Cavitation is the most serious — prolonged cavitation causes rapid impeller and seal damage. If the noise is accompanied by fluctuating pressure, call us promptly. We also carry out noise reduction work on booster pump installations where vibration is causing a nuisance to building occupants.
5. Pump Tripping the Electrics
A booster pump tripping the circuit breaker or overload relay is almost always caused by the motor drawing more current than its rated load — a sign that it’s working harder than it should. Common reasons include a partial blockage of the inlet or impeller, a seized bearing, or a winding fault in the motor.
Do not repeatedly reset and restart a pump that is tripping — this can cause further damage. Isolate the supply and call our engineers for a diagnosis.
6. Low Output Pressure (Pump Running but Pressure Too Low)
Reduced output pressure with the pump running normally usually indicates a partly blocked inlet strainer, a failing impeller, or incorrect pressure switch settings. In some cases it reflects a change in demand — a building extension or additional appliances drawing more water than the existing pump was specified to supply.
Our engineers will check strainer condition, run a pressure and flow test, and assess whether the existing pump is correctly specified for current demand. Where the pump is undersized, we’ll advise on the most cost-effective upgrade path.
For a deeper guide to pressure pump problem solving, see our blog post: 7 Common Problems with Booster Pumps and How to Fix Them →
- Inlet strainer inspection and cleaning — blocked strainers are a leading cause of reduced output and cavitation damage
- Pressure switch testing and calibration — verifying correct cut-in and cut-out pressures and adjusting where necessary
- Non-return valve check — testing for correct seating and absence of leakage
- Motor insulation and current draw testing — identifying winding deterioration before it causes motor failure
- Vibration and noise assessment — checking pipework fixings, flexible connectors and pump mountings
- Control panel inspection — verifying VSD settings, overload protection and alarm functions where fitted
- Expansion vessel pressure check (where fitted) — ensuring correct pre-charge pressure to prevent pump short-cycling
- Overall system pressure and flow test — confirming the system is delivering to its design specification
- Written condition report — a full record of findings, work carried out and any recommendations
Are you responsible for the ongoing maintenance of a booster set? Click the link below to download our free booster pump inspection checklist.
If you have a building with more than two storeys or have a reduced mains water pressure, you may need a booster set. If you have a private water supply (borehole or well) that discharges water into a header tank for onward transport you may also need a booster set.
We design, supply and install booster pump sets for domestic, commercial applications, private water supplies, hospitals, hotels, blocks of flats and factories where the mains water pressure needs boosting.
If you have low water pressure and need a water boosting solution, or currently have a system in place and want to book a pump systems survey to measure efficiency, we can help, get in touch with one of our team today on 0117 954 8030.
Lowara
DAB
Calpeda
Pedrollo
Grundfos
And more...
Emergency Booster Pump Breakdown Service
When a Booster Pump fails then the effects on a business or domestic site can leave a site without water. Mawdsleys is able to attend to ensure your site has a water supply with the shortest down time possible. Visit our dedicated page for more information on our 24 hour emergency pump breakdown attendance service.
Reverse Osmosis Booster Pumps
For specialist clean water applications, Mawdsleys can provide booster pumping systems with RO (Reverse Osmosis) which pumps water through a membrane at high pressure to remove any impurities. For further information please contact us.
Noise Reduction in Existing Booster Pump Systems
We also have wide experience in helping facilities management companies reduce the noise from existing Booster Pump Systems to improve tenant satisfaction.
Booster Pumps for Domestic Homes
One of our most popular domestic and small commercial booster pumping systems is the DAB esybox system.
Not sure whether your pressure pump needs a repair or a service? Our guide to the 7 most common booster pump problems covers fault diagnosis, causes and what to do — including when to call an engineer and when the fix is something you can manage yourself.
7 Common Problems with
Booster Pumps and How to Fix Them
Booster Pump FAQs
Failure to start is often caused by a lack of power, but if the electrics are fine, the culprit is usually a failed pressure sensor or a low-water cut-out. Modern booster sets are designed to shut down if they detect a lack of incoming water.
The price varies depending on:
- The location of the site
- Whether we can fix the problem on-site or we have to remove the pump
- The type of pump
Do not hesitate to call us if your sewage pump fails, as we can provide you with guidance over the phone, too.
A booster pump functions as a “turbocharger” for your plumbing, increasing water pressure and flow when the existing supply or gravity is insufficient to meet demand. It ensures a consistent, high-pressure flow to showers and appliances, particularly in multi-story buildings or during periods of heavy water usage.
You likely need a booster pump if you experience weak water pressure or if your mains supply cannot reach the upper floors of your building with consistent pressure. It is also essential if you are installing modern unvented cylinders or high-end appliances that require a specific minimum pressure to operate correctly.
If your property is suffering from low water pressure, the most effective solution is to install a water booster pump (also called a water pressure pump or pressure booster set). A booster pump sits between the incoming mains supply and your internal plumbing, drawing in water and boosting it to a higher, consistent pressure before delivery. This ensures reliable pressure at showers, taps and appliances regardless of demand fluctuations from the wider mains network. Mawdsleys supplies and installs booster pump systems for domestic properties, commercial buildings and private water supplies — call 0117 954 8030 to discuss your requirements.
The most common reasons a water pressure pump stops working are: a triggered low-water cut-out (the pump has shut itself down because incoming mains pressure has dropped), a failed pressure switch or sensor, a tripped circuit breaker, or a blockage at the inlet strainer. Start by checking your electrical supply and control panel. If everything appears normal but the pump won’t start or isn’t building pressure, call our engineers — we can often help diagnose the fault over the phone before attending site.
Yes. Mawdsleys is based in Bristol and our engineers cover Bristol, Bath, Cardiff, Newport, Gloucester, Cheltenham, Exeter, Swindon, Southampton, Weston-super-Mare and the wider South West and South Wales region. We provide both emergency water pressure pump repair — 24/7, 365 days a year — and planned booster pump service and maintenance. Call 0117 954 8030 to confirm coverage for your location.
A booster pump repair is reactive — it addresses a fault that has already occurred. A booster pump service is proactive — a scheduled inspection and maintenance visit designed to identify potential faults before they develop into breakdowns. Most of the pressure pump failures we attend could have been prevented with a routine service visit. We provide both, and can advise which is appropriate for your situation when you call.