--- title: "System & Regular Boiler Servicing in Stockport | Swainson Gas" description: "Specialist servicing for system and regular (heat-only) boilers with hot water cylinders. Gas Safe #9663 engineer, Stockport and Greater Manchester. From £98 inc. 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Gas Safe #9663 engineer, Stockport and Greater Manchester. From £98 inc. VAT.", "provider": { "@type": "LocalBusiness", "name": "Swainson Gas Services Ltd", "telephone": "07442 536165", "address": { "@type": "PostalAddress", "addressLocality": "Stockport", "addressCountry": "GB" } }, "areaServed": [ "Hazel Grove", "Stockport", "Bramhall", "Cheadle Hulme", "Poynton", "Marple", "High Lane" ], "url": "/services/system-regular-boiler-servicing" }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Do you service system boilers as well as combis?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, combis, system boilers, and regular heat-only boilers all covered. Cylinder-based systems are a large part of our work in Bramhall, Marple and the older Stockport properties." } }, { "@type": "Question", "name": "Will you check the cylinder as well as the boiler?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Cylinder, pump, valves and controls are all inspected as part of a proper system boiler service." } }, { "@type": "Question", "name": "How much does it cost?", "acceptedAnswer": { "@type": "Answer", "text": "From £98 inc. VAT for a basic service, or £155 + parts inc. VAT for a full strip-down service (recommended for boilers over five years old)." } }, { "@type": "Question", "name": "How long does it take?", "acceptedAnswer": { "@type": "Answer", "text": "Typically 40 to 75 minutes for the boiler itself, depending on the model and what needs doing." } }, { "@type": "Question", "name": "I have an old vented (open) system, is that still worth servicing?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Older systems benefit even more from annual attention because parts wear differently. We service them honestly and only recommend replacement when it's genuinely time." } }, { "@type": "Question", "name": "Do you service unvented cylinders?", "acceptedAnswer": { "@type": "Answer", "text": "No — full unvented cylinder servicing needs a G3 ticket, which we don't hold. We'll give the cylinder a visual check as part of a system boiler service and flag anything that looks wrong, but any tundish testing, safety valve or expansion vessel work should be done by a G3-qualified engineer." } }, { "@type": "Question", "name": "What about the header tank in the loft?", "acceptedAnswer": { "@type": "Answer", "text": "Checked as part of the service on regular boilers. Ball valves and float condition included." } }, { "@type": "Question", "name": "Do I get a written record?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, every time. Kept on file and issued to you for warranty and records." } } ] } ] --- Based in Stockport [info@swainsongas.co.uk](mailto:info@swainsongas.co.uk)Gas Safe registered #9663 Open 7am – 6pm, 7 days [](https://www.facebook.com/people/Swainson-Gas-Services/61563360904402/)[](https://www.instagram.com/swainsongas/)[](https://x.com/swainsongas) [![Swainson Gas Services](/__l5e/assets-v1/2f3afd23-ed83-4d5d-a90b-6d75c9544dc3/swainson-logo.png)](/) [Home](/) [About](/about) [Services](/services) Our services - [Boiler Servicing & Maintenance](/services/boiler-servicing) - [Boiler Repairs & Breakdowns](/services/boiler-repairs) - [Gas Safety Checks](/services/landlord-gas-safety-check) - [Heating Controls & Radiators](/services/thermostat-heating-controls) - [Other Gas Services](/services/gas-fire-servicing) [Areas](/areas) Areas we cover [Hazel Grove](/areas/hazel-grove)[Stockport](/areas/stockport)[Poynton](/areas/poynton)[Bramhall](/areas/bramhall)[Cheadle Hulme](/areas/cheadle-hulme)[Marple](/areas/marple)[High Lane](/areas/high-lane)[Sale](/areas/sale)[Didsbury](/areas/didsbury)[Offerton](/areas/offerton)[Woodley](/areas/woodley)[Bredbury](/areas/bredbury)[Romiley](/areas/romiley)[Davenport](/areas/davenport)[Heaviley](/areas/heaviley)[Gatley](/areas/gatley)[Cheadle](/areas/cheadle)[Disley](/areas/disley)[Handforth](/areas/handforth)[The Heatons](/areas/the-heatons) [Reviews](/reviews) [Contact](/contact) [Call the engineer 07442 536165 ](tel:+447442536165)[Book in now](/contact) ![System boiler heat exchanger fins clean and free of debris after full service](/__l5e/assets-v1/f6ddf379-3976-4020-b307-7e4d11572b2c/swainson-gas-services-boiler-servicing-heat-exchanger-after-03.jpg) [Home](/)[Services](/services)System & Regular Boiler Servicing System & Regular Boiler Servicing # System & Regular Boiler Servicing in Stockport For Cylinder-Based Systems. Larger family homes and older properties run on system and heat-only boilers with hot water cylinders, a very different animal from a combi and one that deserves servicing by someone who actually understands pumps, motorised valves, and expansion vessels. [Book a service or repair](/contact) [Call 07442 536165](tel:+447442536165) **5.0** Google (36) Gas Safe #9663 System & regular boilers · Underfloor systems welcome From £98 inc. VAT Gas Safe registered #9663 Family-run since 1986 12-month workmanship guarantee 5.0 ★ Google (36 reviews) What we do ## System & Regular Boiler Servicing, done properly. System boilers and regular (heat-only) boilers work with a hot water cylinder rather than heating water on demand. That means an annual service needs to look at more than just the boiler, it needs to consider the pump, the expansion vessel, the motorised valves, and the cylinder's own controls. That's the service we do. What it is The boiler itself gets the same manufacturer-spec strip-down and combustion analysis as any service. Then we check pump operation, boiler expansion vessel pre-charge, zone/motorised valves, temperature controls, and the state of the system water, because dirty water is what kills pumps and heat exchangers. Unvented hot water cylinders are given a visual check only — full unvented cylinder servicing needs a G3-ticketed engineer, which we don't hold, so we'll flag anything obvious and recommend a specialist if a full cylinder service is due. Who it's for Larger family homes, older properties, houses with an airing cupboard cylinder, homes with underfloor heating, and any property where the boiler drives a cylinder rather than the taps directly. Common across the older streets of Marple, Bramhall, Cheadle Hulme and the leafier parts of Stockport. When you need it Annually. If the boiler is older and hasn't been serviced regularly, book sooner rather than later, pumps and motorised valves that haven't been checked for a few years are the classic reason for a winter no-heat callout. Why it matters A cylinder-based system has more moving parts than a combi and more places for problems to hide. A service that only looks at the boiler misses the pump about to seize, the motorised valve stuck half-open, and the expansion vessel that's lost its pre-charge. All of those become full repairs if they're not caught. Book a service or repair ### Speak directly to the engineer. from £98 inc. VAT Recent work ## Real jobs, real results. Photographs from recent system & regular boiler servicing work carried out by John across Stockport and the surrounding areas. ![Boiler heat exchanger heavily sooted before a full service by Swainson Gas Services](/__l5e/assets-v1/fa25bcfa-960f-4fe5-9109-3777dcd2321d/swainson-gas-services-boiler-servicing-heat-exchanger-before-01.jpg) ![Same heat exchanger cleaned and combustion-tested after a full service in Stockport](/__l5e/assets-v1/a0d9a125-d950-4f9c-9d51-2d3f16654c7b/swainson-gas-services-boiler-servicing-heat-exchanger-after-01.jpg) ![Burner assembly fouled with combustion debris before annual service](/__l5e/assets-v1/344d7897-b45d-48a8-bed3-b644422ff42a/swainson-gas-services-boiler-servicing-burner-assembly-before-01.jpg) ![Burner assembly stripped and cleaned by John Swainson after service](/__l5e/assets-v1/cb8bdefe-e670-4bdc-8d1d-acb106e3e60a/swainson-gas-services-boiler-servicing-burner-assembly-after-01.jpg) What happens if it's ignored ## The cost of putting it off. System and regular boilers age gracefully when serviced and badly when they aren't. Here's what typically happens when a cylinder-based system is left to its own devices. ### Pump failure in December Central heating pumps have a service life. They fail with warning signs (noise, intermittent heat) that a service catches, or they fail in the middle of a cold snap. ### Stuck motorised valves Zone valves that aren't exercised seize. Heating comes on when hot water is called for, or hot water goes cold. Common, cheap to prevent, expensive to ignore. ### Cylinder scaling Unvented cylinders scale up in the Stockport water area faster than most homeowners realise. Un-serviced cylinders lose recovery time and eventually their coil. ### Dirty system water Sludge and magnetite in the system water erode pumps and block heat exchangers. Ignored, it turns into a full powerflush job. Common mistakes we see - Assuming an airing-cupboard cylinder never needs looking at. - Never touching the expansion vessel(s), one of the most common causes of pressure loss. - Booking a boiler service that only opens the boiler and ignores the rest of the system. Our process ## A clear five-step system. No guessing, no meter-running. Every job follows the same repeatable process, that's how the result stays consistent. 1. 01 ### System survey Pipework, cylinder, controls and pump identified. System water condition checked. 2. 02 ### Boiler service Full strip-down and combustion analysis to manufacturer schedule. 3. 03 ### Pump & valves Pump operation confirmed, motorised valves exercised, motors tested under load. 4. 04 ### Cylinder & vessels Cylinder inspected, expansion vessel pre-charge verified and re-set where required. 5. 05 ### Report & guarantee Written record covering boiler and system, plain-English summary, 12-month workmanship guarantee. Why it's worth doing ## What you actually get. ### Whole-system view You don't just get a boiler serviced, you get the system that surrounds it looked at properly. ### Fewer surprise breakdowns Pumps and valves fail with warning signs. We catch them before you're calling on a snowy Monday. ### Efficient hot water Cylinder controls tuned means quicker hot water recovery and less standing heat loss. ### Warranty preserved Manufacturer service schedule kept and logged, no arguments if a warranty claim is ever needed. ### Cleaner system water Regular servicing highlights sludge build-up early, before it costs a full flush. ### One trusted engineer Swainson Gas Services has serviced system boilers across Stockport since 1986. Same familiar face on your job each year. In depth ## The detail that matters. System and regular boilers are often lumped together, but there are real differences that matter at service time. ### System boilers Sealed pressurised systems with the expansion vessel and pump built into the boiler. Common on modern installs from Worcester Greenstar Si, Vaillant ecoTEC System, Ideal Logic System. Service focus: internal expansion vessel pre-charge, pump operation, and system pressure stability. ### Regular (heat-only) boilers Open-vented systems with a feed-and-expansion tank in the loft and a separate cylinder in the airing cupboard. Common in older Bramhall, Marple and Davenport properties. Service focus: header tank condition, ball valve operation, gravity/pumped hot water configuration. ### Unvented cylinders (visual check only) Megaflo, Santon Premier and equivalents get a visual check as part of a system boiler service — we're not G3-ticketed, so full unvented cylinder servicing (tundish testing, safety valve discharge, expansion vessel recharge) is left to a specialist. If something looks off, we'll tell you plainly. ### S-plan and Y-plan systems Motorised valve configurations that control how the boiler serves the cylinder and radiators. Understanding which system you have, and exercising the valves annually, is the single biggest reason system-boiler service quality varies between engineers. FAQs ## Questions we hear every week. If you have a question that isn't answered here, ring John directly on 07442 536165. ### Do you service system boilers as well as combis? ### Will you check the cylinder as well as the boiler? ### How much does it cost? ### How long does it take? ### I have an old vented (open) system, is that still worth servicing? ### Do you service unvented cylinders? ### What about the header tank in the loft? ### Do I get a written record? Related services ## Often booked together. [All services](/services) [ Boiler Servicing & Maintenance Boiler Servicing Learn more → ](/services/boiler-servicing)[ Boiler Repairs & Breakdowns Boiler Repairs & Breakdowns Learn more → ](/services/boiler-repairs)[ Boiler Servicing & Maintenance Central Heating Maintenance Contracts Learn more → ](/services/central-heating-maintenance-contract)[ Heating Controls & Radiators Thermostat & Heating Control Install / Repair Learn more → ](/services/thermostat-heating-controls) ![Swainson Gas Services vehicles ready for calls across Stockport and Hazel Grove](/__l5e/assets-v1/160943dc-12df-4f98-9e74-b100ef4b83cc/swainson-gas-services-service-vehicles-fleet.jpg) Ready when you are ## Cylinder-based system? Book the engineer who understands the whole system. Boiler, pump, cylinder and controls, all serviced and reported on in one visit. [Book a service or repair](/contact) [07442 536165](tel:+447442536165) Gas Safe #9663 · 12-month workmanship guarantee · Card on the job ![Swainson Gas Services](/__l5e/assets-v1/2f3afd23-ed83-4d5d-a90b-6d75c9544dc3/swainson-logo.png) Swainson Gas Services Family run · Est. 1986 Stockport's trusted boiler repair, servicing and gas safety specialists. Nearly 40 years on the tools, one engineer, one standard. Gas Safe Registered Registration No. 9663 Services - [Boiler Repairs](/services/boiler-repairs) - [Boiler Servicing](/services/boiler-servicing) - [Landlord Gas Safety Check](/services/landlord-gas-safety-check) - [Emergency Boiler Callouts](/services/emergency-boiler-callouts) - [Central Heating Maintenance](/services/central-heating-maintenance-contract) Areas covered - [Hazel Grove](/areas/hazel-grove) - [Stockport](/areas/stockport) - [Poynton](/areas/poynton) - [Bramhall](/areas/bramhall) - [Cheadle Hulme](/areas/cheadle-hulme) - [Marple](/areas/marple) - [High Lane](/areas/high-lane) - [Sale](/areas/sale) - [Didsbury](/areas/didsbury) - [Offerton](/areas/offerton) - [Woodley](/areas/woodley) - [Bredbury](/areas/bredbury) - [Romiley](/areas/romiley) - [Davenport](/areas/davenport) - [Heaviley](/areas/heaviley) - [Gatley](/areas/gatley) - [Cheadle](/areas/cheadle) - [Disley](/areas/disley) - [Handforth](/areas/handforth) - [The Heatons](/areas/the-heatons) [See all areas & services →](/areas-we-cover) Contact - [07442 536165](tel:+447442536165) - [info@swainsongas.co.uk](mailto:info@swainsongas.co.uk) - Based in Stockport - 7 days a week, 7 AM – 6 PM [](https://www.facebook.com/people/Swainson-Gas-Services/61563360904402/)[](https://www.instagram.com/swainsongas/)[](https://x.com/swainsongas) © 2026 Swainson Gas Services Ltd. 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