--- title: "Hot Water Systems | Northstar Plumbing" description: "Get reliable hot water with professional repairs, servicing and upgrades in Brighton, with clear communication, transparent pricing and careful testing." canonical: "https://www.northstarplumbing.co.uk/service-categories/hot-water-systems" --- # Hot Water Systems **Hot water systems** kept safe and dependable, from diagnosis to repairs, servicing and upgrades. Expect clear options, tidy workmanship and thorough testing for consistent hot water. When your hot water is unreliable, slow, or showing signs of wear, a category-wide review can prevent repeat problems. We assess the cylinder and connected components, identify the cause, and explain your options in plain English before any work starts. You can expect careful installation and repair standards, safety-focused checks, and clear next steps to help protect performance, efficiency and long-term reliability. 5 out of 5 (3 reviews) - > “Booked an appointment for radiators that were not heating properly. I appreciated the clear explanation and options. Mark was efficient and explained things in plain English. Really pleased overall.” — Olivia F. ![Cool-toned 3D render of a tidy utility-room workbench with plumbing tools and a pressure gauge, blurred insulated pipes and a shutoff valve in the background, no heater visible.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Futility_room_workbench_pressure_diagnosis_3d_render.png%3Fv%3D1770397985038&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ) ![Wall-mounted boilers, white tanks and dense network of stainless-steel pipes with red and blue manifolds](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fboiler-room-piping-manifold-filter.jpg%3Fv%3D1768575108210&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)![An illustration showing someone turning a valve on a hot water cylinder in a home airing cupboard.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fhot-water-cylinder-isolation-uk-home.png%3Fv%3D1769178280897&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ) - ## Vented Hot Water Cylinder Replacement Vented cylinder replacement for homes and rentals. Old tank removed, new like-for-like unit fitted, then refilled, vented and tested for dependable hot water. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/vented-hot-water-cylinder-replacement) - ## Vented Hot Water Cylinder Installation Supply and fit a vented hot water cylinder, matched to demand and existing pipework. Safe installation, immersion checks, commissioning and a clear handover. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/vented-hot-water-cylinder-installation) - ## Unvented Cylinder Service Book an annual unvented hot water cylinder service for safe operation and steady performance. Full safety device checks, fault finding, and advice on next steps. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/unvented-cylinder-service) - ## Unvented Cylinder Replacement Safe replacement of your unvented hot water cylinder, sized correctly for your property and fully commissioned with safety checks and compliance paperwork. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/unvented-cylinder-replacement) - ## Unvented Cylinder Repair Specialist diagnosis and repair for unvented hot water cylinders, fixing leaks, pressure issues and no hot water. Safe, compliant work with clear options before repairs start. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/unvented-cylinder-repair) - ## Unvented Cylinder Installation Supply and installation of unvented hot water cylinders for strong mains-pressure showers, correct safety controls, compliant discharge pipework, and full commissioning. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/unvented-cylinder-installation) - ## Temperature & Pressure Relief Valve Replacement Certified replacement of temperature and pressure relief valves on unvented hot water cylinders, stopping leaks and restoring safe, regulated pressure. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/temperature-and-pressure-relief-valve-replacement) - ## Immersion Heater Replacement Replacement of failed immersion heaters to restore reliable hot water. Includes fault finding, safe fitting, and testing at the cylinder so it heats correctly. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/immersion-heater-replacement) - ## Immersion Heater Repair Diagnose and repair immersion heater faults to restore safe, reliable hot water. Element, thermostat and electrical checks, with compliant work on unvented cylinders. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/immersion-heater-repair) Show more services - ## Immersion Heater Installation Professional immersion heater installation for hot water cylinders, from correct sizing and fitting to safe wiring checks, testing and commissioning for dependable hot water. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/immersion-heater-installation) - ## Hot Water System Upgrade Improve hot water capacity and efficiency with a tailored upgrade to your cylinder, immersion and safety controls, then test and commission for reliable daily use. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/hot-water-system-upgrade) - ## Hot Water System Commissioning Ensure your hot water system is safe, correctly set up and compliant after installation or major repairs. Includes checks, adjustments, performance testing and clear handover. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/hot-water-system-commissioning) - ## Hot Water Recirculation Pump Installation Get hot water at taps faster with a professionally fitted recirculation pump. Reduced waiting time and wasted water, with safe commissioning and controls set up. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/hot-water-recirculation-pump-installation) - ## Hot Water Performance Investigation If your hot water is lukewarm, weak or runs out quickly, we test the system, identify the fault and advise the safest, most cost-effective repair options. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/hot-water-performance-investigation) - ## Hot Water Cylinder Leak Repair Leak repair for hot water cylinders, valves and immersion fittings. Clear diagnosis, safe repairs for vented or unvented systems, and checks to prevent repeat leaks. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/hot-water-cylinder-leak-repair) - ## Expansion Vessel Replacement Professional expansion vessel replacement for domestic hot water systems. Stops pressure swings, reduces discharge from relief valves, and protects cylinders and pipework. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/expansion-vessel-replacement) - ## Cylinder Thermostat Replacement Replacement of faulty hot water cylinder thermostats to restore steady temperature control, improve efficiency and reduce the risk of overheating or inconsistent hot water. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/cylinder-thermostat-replacement) - ## Cold Water Feed Repair (Cylinder) Diagnose and repair cold water feed faults to hot water cylinders, restoring steady hot water supply and safe operation with clear explanations and next steps. * * * [Contact Us](https://www.northstarplumbing.co.uk/redirect)[View Service](/services/cold-water-feed-repair-cylinder) ## Frequently Asked Questions What problems can hot water system work help resolve? This category covers common issues such as fluctuating temperatures, reduced flow, leaks, unusual noises, or hot water running out quickly. The aim is to restore stable performance and reduce the risk of repeat faults. We also check that key controls and safety components are working as they should. What can I expect when booking a hot water system visit? We start with a focused assessment to understand the symptoms and how the system is operating. You will get a clear explanation of the likely cause and the available options, along with transparent pricing before work proceeds. Once completed, we test the system and confirm performance. Do you work with homeowners, landlords and small commercial sites? Yes, this category is suited to anyone who needs dependable hot water and a professional standard of work. We tailor the approach to the property and usage demands, keeping disruption to a minimum. Communication is kept clear so you can plan around access and downtime. How do you make sure the system is safe and compliant? Hot water systems include components designed to control temperature and pressure safely. As part of the category service, we check operation, confirm correct settings where applicable, and verify the system performs as expected after any work. If anything needs attention, we explain the implications and the best route forward. Can you help improve hot water performance and efficiency? Yes. Performance issues are often linked to system condition, controls, or how the setup matches demand. We identify what is limiting output and recommend practical steps to improve reliability and reduce waste, with options set out clearly so you can choose what fits your priorities.