--- title: "Boiler Installation in Stockport & Greater Manchester | Swainson Gas Services" description: "New boiler installation in Stockport by a Gas Safe #9663 family firm running since 1986. Honest sizing advice, tidy fitting, full manufacturer warranty registration and a 12-month workmanship guarantee." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "/#organization", "name": "Swainson Gas Services Ltd", "alternateName": "Swainson Gas Services", "url": "/", "logo": "/__l5e/assets-v1/2f3afd23-ed83-4d5d-a90b-6d75c9544dc3/swainson-logo.png", "image": "/__l5e/assets-v1/2f3afd23-ed83-4d5d-a90b-6d75c9544dc3/swainson-logo.png", "telephone": "07450 308361", "email": "info@swainsongas.co.uk", "foundingDate": "1986", "founder": { "@type": "Person", "name": "Alan Swainson" }, "address": { "@type": "PostalAddress", "addressLocality": "Stockport", "addressCountry": "GB" }, "sameAs": [ "https://www.facebook.com/people/Swainson-Gas-Services/61563360904402/", "https://www.instagram.com/swainsongas/", "https://x.com/swainsongas" ] }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "/#website", "name": "Swainson Gas Services", "url": "/", "inLanguage": "en-GB", "publisher": { "@id": "/#organization" } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "/services" }, { "@type": "ListItem", "position": 3, "name": "Boiler Installation", "item": "/services/boiler-installation" } ] }, { "@context": "https://schema.org", "@type": "Service", "serviceType": "Boiler Installation", "name": "Boiler Installation", "description": "New boiler installation in Stockport by a Gas Safe #9663 family firm running since 1986. Honest sizing advice, tidy fitting, full manufacturer warranty registration and a 12-month workmanship guarantee.", "provider": { "@type": "LocalBusiness", "name": "Swainson Gas Services Ltd", "telephone": "07450 308361", "address": { "@type": "PostalAddress", "addressLocality": "Stockport", "addressCountry": "GB" } }, "areaServed": [ "Hazel Grove", "Stockport", "Bramhall", "Cheadle Hulme", "Poynton", "Marple", "High Lane" ], "url": "/services/boiler-installation" }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does a new boiler cost?", "acceptedAnswer": { "@type": "Answer", "text": "It depends on the boiler, the property and whether the system needs converting. We survey the property and give one fixed written price covering boiler, parts, labour, cleanse, filter, disposal and certification, with no extras added later." } }, { "@type": "Question", "name": "How long does a boiler installation take?", "acceptedAnswer": { "@type": "Answer", "text": "A straight combi-for-combi swap is usually one day. A back boiler removal or a heat-only to combi conversion is typically two days, sometimes three in larger properties." } }, { "@type": "Question", "name": "Will I be without heating and hot water?", "acceptedAnswer": { "@type": "Answer", "text": "Only for the working part of the installation. We aim to leave you with heating and hot water at the end of each day wherever the job allows." } }, { "@type": "Question", "name": "Do you register the warranty for me?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. The installation is registered with the manufacturer in your name and notified to Building Control, and you receive the paperwork for your files." } }, { "@type": "Question", "name": "Do you clean the system before fitting?", "acceptedAnswer": { "@type": "Answer", "text": "Always. A system cleanse, inhibitor dose and magnetic filter are standard on every installation we carry out, because that is what protects the new heat exchanger." } }, { "@type": "Question", "name": "Should I repair my old boiler instead?", "acceptedAnswer": { "@type": "Answer", "text": "Often, yes. If the boiler is safe, parts are available and the repair is proportionate to the boiler's age, we will say so. We would rather fix your boiler now and fit the new one when it genuinely makes sense." } }, { "@type": "Question", "name": "What size boiler do I need?", "acceptedAnswer": { "@type": "Answer", "text": "That comes from your radiator count, property size, hot water demand and mains flow rate, not from a rule of thumb. Oversizing is one of the most common and most expensive installation mistakes." } }, { "@type": "Question", "name": "How do I book a survey?", "acceptedAnswer": { "@type": "Answer", "text": "Ring 07450 308361, or send the callback form and John will come back to you personally." } } ] } ] --- 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 07450 308361 ](tel:+447450308361)[Book in now](/contact) ![Newly installed Ideal Logic combi boiler fitted by Swainson Gas Services in Stockport](/__l5e/assets-v1/5f3a8fd5-9496-42de-a36e-63eac11bce63/swainson-gas-services-boiler-installation-ideal-logic-combi.jpg) [Home](/)[Services](/services)Boiler Installation Boiler Installation # A New Boiler Fitted Properly, By The Engineer Who'll Still Be Servicing It in Stockport and Greater Manchester. Straight advice on whether your boiler is genuinely worth replacing, the right size for your home rather than the biggest one we can sell you, and a clean, certificated installation you never have to think about again. [Book a service or repair](/contact) [Call 07450 308361](tel:+447450308361) **5.0** Google (36) Gas Safe #9663 Free no-obligation survey · Same engineer for the next service Manufacturer warranty registered Gas Safe registered #9663 Family-run since 1986 12-month workmanship guarantee 5.0 ★ Google (36 reviews) What we do ## Boiler Installation, done properly. Replacing a boiler is the biggest single spend most households make on their heating, and it is the one decision where a bad job costs you for the next decade. Swainson Gas Services has been fitting and looking after boilers across Stockport and the surrounding areas since 1986, first with Alan, now with his son John. Every installation is carried out personally, not sub-contracted to a fitting team you will never see again, and the same engineer who fits your boiler is the one who services it every year afterwards. What it is A full boiler installation covers survey and heat-loss sizing, removal and safe disposal of the old appliance, new boiler fitted with the correct gas supply and condensate route, system cleanse and inhibitor, magnetic filter fitted, controls set up and explained, commissioning with a flue gas analyser, Building Regulations notification, and manufacturer warranty registration in your name. Who it's for Homeowners with a boiler that keeps breaking down or is beyond economical repair, people moving to a modern condensing combi from an old back boiler or heat-only system, landlords who want a reliable appliance and a warranty they can lean on, and anyone who has been quoted for a replacement and simply wants a second, honest opinion. When you need it The honest answer is: when repair costs stop making sense, not before. A boiler over twelve years old with a failed heat exchanger, a discontinued parts list, or a repeat fault history is a replacement candidate. A ten-year-old boiler with one failed part usually is not. If the appliance is still safe and repairable, we will tell you to repair it. Why it matters Most of the bad boiler installations we are called out to fix were not fitted badly on the day, they were specified badly before anyone picked up a spanner. An oversized boiler short-cycles, wastes gas and wears out early. A system fitted without a cleanse and a filter fills the new heat exchanger with the old system's sludge inside two winters. A boiler never registered with the manufacturer has no warranty at all when you need it. Book a service or repair ### Speak directly to the engineer. What happens if it's ignored ## The cost of putting it off. A new boiler should be the end of your heating problems, not the start of a new set. Here is what goes wrong when an installation is rushed, undersized on thought and oversized on kilowatts. ### Oversized boiler, higher bills A 35kW combi in a two-bed terrace fires up, satisfies the demand in seconds and shuts down again, over and over. Short-cycling burns more gas, stresses components and shortens the boiler's life. ### New boiler, old sludge Fitting a modern condensing boiler onto an uncleansed system pushes years of magnetite straight into the new heat exchanger. It is the single most common reason a new boiler fails early, and the most common reason a warranty claim is refused. ### No warranty on record Manufacturer warranties only exist once the installation is registered by a Gas Safe engineer and serviced annually. An unregistered fit leaves you with a five-figure appliance and no cover. ### No Building Regulations notification Every new gas boiler must be notified to Building Control. Miss it and it surfaces at the worst moment, usually mid-sale, with a solicitor asking for a certificate nobody has. Common mistakes we see - Choosing the boiler by price per kW rather than by hot water flow rate and the number of bathrooms actually in use. - Letting a quote skip the system cleanse, the magnetic filter, or the inhibitor to come in cheaper than the next one. - Replacing a boiler that a competent repair would have kept running for another five years. 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 ### Survey and sizing We look at the property, radiator count, bathrooms, water main flow rate and existing pipework, then size the boiler to the home. No guesswork, no upselling. 2. 02 ### Honest written quote One fixed price covering boiler, parts, labour, cleanse, filter, disposal and certification. What is included is written down before you commit. 3. 03 ### Removal and preparation Old appliance drained, disconnected and removed, gas supply and condensate route checked and upgraded where the new boiler requires it. 4. 04 ### Installation and cleanse New boiler fitted, system cleansed, inhibitor dosed and a magnetic filter fitted to protect the heat exchanger from day one. 5. 05 ### Commission, register, explain Combustion analysis, controls set up, Building Regulations notified, warranty registered in your name, and a plain-English walkthrough before we leave. Why it's worth doing ## What you actually get. ### Sized for your home The right output for your radiators and hot water demand, which means lower bills and a boiler that is not fighting itself. ### Full manufacturer warranty Registered properly on the day, then kept valid by an annual service from the same engineer. ### Protected from day one System cleanse, inhibitor and magnetic filter included as standard, not as an optional extra. ### Certificated and notified Building Regulations compliance certificate for your files, your solicitor and any future sale. ### Tidy, respectful work Dust sheets down, old boiler taken away, and the house left as we found it. ### Aftercare that continues 500+ households on ongoing maintenance with us. The person who fits it is the person who looks after it. In depth ## The detail that matters. Boiler installation decisions are mostly made before the fitting starts. These are the choices that actually matter in Stockport housing stock. ### Combi, system or regular? A combi suits most one-bathroom homes: no cylinder, no loft tank, hot water on demand, with the boiler prioritising a hot tap over the radiators while it runs. Homes with two or more bathrooms in simultaneous use, or a poor incoming mains flow rate, are usually better served by a system boiler and an unvented cylinder. We measure the mains flow before recommending anything. ### Swapping a back boiler or heat-only system Older Stockport semis and terraces still run back boilers behind the fire, or heat-only boilers with a loft tank and a cylinder. Converting to a combi frees up the cupboard and loft space, but it changes the pipework, the flue route and sometimes the gas supply size. We price the whole conversion honestly rather than quoting a straight swap and adding extras on the day. ### Brands we fit Worcester Bosch, Vaillant, Ideal, Baxi, Glow-worm, Main and Potterton. We fit what suits the property and the budget, and we are candid about parts availability and warranty length rather than pushing whichever brand pays best. ### Gas supply, flue and condensate A new boiler often needs a larger gas supply pipe than the appliance it replaces, a compliant flue termination distance, and a condensate run that will not freeze on the first cold snap. These are the three details most commonly skipped, and all three are checked and priced up front here. ### Repair or replace? We will always tell you when a repair is the better financial decision. A boiler under ten years old with an available part is usually worth fixing. A boiler over twelve with a failed heat exchanger, obsolete parts, or a third fault in two years usually is not. FAQs ## Questions we hear every week. If you have a question that isn't answered here, ring John directly on 07450 308361. ### How much does a new boiler cost? ### How long does a boiler installation take? ### Will I be without heating and hot water? ### Do you register the warranty for me? ### Do you clean the system before fitting? ### Should I repair my old boiler instead? ### What size boiler do I need? ### How do I book a survey? 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)[ Boiler Servicing & Maintenance Combi Boiler Servicing Learn more → ](/services/combi-boiler-servicing) ![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 ## Thinking about a new boiler? Get an honest answer first. Free survey, correct sizing, fixed written price, full warranty registration and a 12-month workmanship guarantee. [Book a service or repair](/contact) [07450 308361](tel:+447450308361) 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 - [07450 308361](tel:+447450308361) - [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. Company No. 06431538. All rights reserved. [Privacy Policy](/privacy-policy)[Terms & Conditions](/terms-conditions)[Cookie Policy](/cookie-policy)[5.0 on Google (36 reviews)](https://www.google.com/maps/place/Swainson+Gas+Services+Ltd/data=!4m2!3m1!1s0x0:0x6719107ad0de590a?sa=X&ved=1t:2428&ictx=111) [Call 07450 308361](tel:+447450308361) [Book now](/contact) We use essential cookies to run this site, and optional ones for our chat widget. See our [Cookie Policy](/cookie-policy). AcceptReject