Gas Pipe Sizing Investigation
Gas pipe sizing investigation in the UK — verification that existing pipework is correctly sized for connected appliance loads to BS 6891 / IGE/UP/2.
Officially RegisteredAbout Gas Pipe Sizing Investigation
Gas pipe sizing investigation in the UK — verification that existing pipework is correctly sized for connected appliance loads to BS 6891 / IGE/UP/2.
What's Included in Gas Pipe Sizing Investigation
- Load & sizing calculations
- BS 6891 / IGE/UP/2 compliance
- Under-sized pipework identified
- Remedial specification provided
Gas Pipe Sizing Investigation in the UK — Gas Safe Registered Specialists
Looking for a trusted gas pipe sizing investigation in the UK? You're in the right place. Our Gas Safe registered engineers deliver gas pipe sizing investigation across the UK every day of the week — for homeowners, landlords, letting agents, restaurants, hotels, schools, care homes, offices and industrial sites. Every engineer we dispatch in the UK is fully qualified, ID-carded, listed on the official Gas Safe Register and insured up to £5 million in public liability. When you book gas pipe sizing investigation in the UK with us, you get the engineer who actually does the work — not a call-centre operator, not a subcontractor, and never a franchise mark-up. We turn up on time, give a fixed written price before any work starts, and complete the job to the latest UK gas regulations, IGEM/UP/1, BS 6891 and the relevant manufacturer specifications. Whether your gas pipe sizing investigation job in the UK is a same-day emergency, an annual renewal, a planned upgrade or a full new installation, we have an engineer in your area ready to attend — usually the same day, including evenings and weekends at no extra charge.
Why Choose Our Gas Pipe Sizing Investigation in the UK
Load & sizing calculations
Every gas pipe sizing investigation job we complete in the UK starts with load & sizing calculations. That means the right qualifications, the right tools and the right paperwork — first time, every time. Our engineers cover the full COMCAT 1–5, CODNCO1 and CORT1 ticket range, plus all domestic ACS modules, so we never have to send a second engineer or refer you on. One call, one engineer, one fixed price in the UK.
BS 6891 / IGE/UP/2 compliance
Our team specialises in bs 6891 / ige/up/2 compliance across the UK — built up over thousands of completed jobs and 547+ verified 5-star Google reviews. We know the building stock, the boiler models, the plant rooms and the catering kitchens common to the UK, which means faster diagnosis, less guesswork and a cleaner finish on every gas pipe sizing investigation visit.
Under-sized pipework identified
Speed matters. Our promise on under-sized pipework identified in the UK is simple: same-day attendance for emergencies, next-day for non-urgent gas pipe sizing investigation, and pre-booked slots within 30-minute arrival windows so you're never waiting around. We dispatch from local depots inside the UK, not from a distant call-centre, so engineers reach you faster and waste less of your time.
Remedial specification provided
Every gas pipe sizing investigation job in the UK is finished with remedial specification provided. You receive a signed, dated certificate or service report on the day — emailed direct to you, stored in our cloud system and accepted by insurers, Environmental Health Officers, the HSE, Building Control, landlords and managing agents. No chasing paperwork, no waiting weeks for a PDF.
What's Included With Gas Pipe Sizing Investigation in the UK
When you book gas pipe sizing investigation in the UK with our Gas Safe registered team, every visit includes a full safety inspection of the gas installation, a tightness test where applicable, a combustion analysis on any affected appliance, and a written report covering everything we found, everything we did, and anything we recommend. We deliver gas pipe sizing investigation work to the latest editions of the Gas Safety (Installation and Use) Regulations 1998, IGEM/UP/1B (commercial tightness testing), IGEM/UP/19 (catering interlocks), BS 6173 (commercial catering installations) and BS 6644 / IGEM/UP/10 (commercial plant rooms above 70 kW). For domestic gas pipe sizing investigation in the UK we work to BS 7671, BS 5440 and the manufacturer's MI for the appliance in question. Pricing is fully transparent. You'll know the cost of your gas pipe sizing investigation in the UK before our engineer arrives — no call-out fees rolled in at the end, no commission-driven upsells and no surprise extras. If we spot anything dangerous on a related installation while we're at your the UK property, we'll make it safe, explain the options in plain English and quote a fixed price for the remedial work; you decide what happens next.
Book Gas Pipe Sizing Investigation in the UK Today
Need gas pipe sizing investigation in the UK? Call 07427 826446 or request a fixed online quote — same-day Gas Safe registered engineers are usually available, 7 days a week, including evenings, weekends and bank holidays. Every gas pipe sizing investigation job in the UK comes with a 12-month workmanship guarantee and a certificate issued on the day.
How Gas Pipe Sizing Investigation Works
- 1
Get in touch
Call or book online for gas pipe sizing investigation anywhere in the UK. We'll confirm scope and a fixed price.
- 2
Engineer attends
A Gas Safe registered commercial engineer attends at the agreed time, fully equipped and qualified for the work.
- 3
Work completed & certified
Work is completed to the relevant standard (IGEM, BS, manufacturer spec) and you receive the appropriate certificate or report on the day.
FAQs about Gas Pipe Sizing Investigation
How much does gas pipe sizing investigation cost in the UK?+
Pricing depends on the size of your premises, the number of appliances and any access requirements. We always provide a fixed written quote before any work starts in the UK.
Are your engineers Gas Safe registered for gas pipe sizing investigation?+
Yes. All of our engineers are Gas Safe registered for the relevant commercial categories (COMCAT 1–5, CODNCO1, CORT1) and carry the right qualifications for gas pipe sizing investigation in the UK.
How quickly can you attend in the UK?+
For most the UK jobs we can attend the same day or next day. For emergencies we offer a 24/7 call-out service across the UK and surrounding areas.
Do you provide a certificate or report on completion?+
Yes — every job is completed with the correct documentation, whether that is a CP-series certificate, a tightness test record, a service report or an interlock commissioning certificate.
Do you cover commercial premises throughout the UK?+
Yes. We cover restaurants, pubs, hotels, schools, care homes, offices and industrial sites across the UK and the surrounding areas — including landlords, managing agents and facilities companies.
What size gas pipe is classed as commercial?+
Commercial Pipework Competent in the install & removal of gas pipework greater than 35mm (1 1/4") in diameter.
Other Commercial Gas Services Often Booked With Gas Pipe Sizing Investigation
Our Gas Safe engineers can carry out any of the works below in the same visit.
Gas Appliance Relocation — commercial Gas Safe engineers
Gas appliance relocation in the UK — moving boilers, cookers and commercial gas appliances with new pipework, flue alterations and full recommissioning.
Gas Pipework Modification — commercial Gas Safe engineers
Gas pipework modification in the UK — alterations, extensions and rerouting of gas installation pipework for refurbishments, layout changes and new appliances.
Gas Leak Investigation — commercial Gas Safe engineers
Gas leak investigation in the UK — urgent trace and repair of gas escapes using electronic detection and pressure testing by Gas Safe registered engineers.
Gas Tightness Test — commercial Gas Safe engineers
Gas tightness testing in the UK — formal strength and tightness testing of gas installations to IGE/UP/1 & BS 6891 for handover, insurance and safety compliance.
Gas Pipework Purge — commercial Gas Safe engineers
Gas pipework purging in the UK — safe purging of new and existing gas installations to IGE/UP/1 before commissioning or after works, with certification.
Gas Emergency Control Valve Replacement — commercial Gas Safe engineers
Emergency control valve (ECV) replacement in the UK — replacement of faulty or seized meter control valves, coordinated with the gas transporter where required.
Gas Isolation Valve Replacement — commercial Gas Safe engineers
Gas isolation valve replacement in the UK — replacement of appliance and pipework isolation valves that leak, seize or fail to shut off safely.
Gas Solenoid Valve Replacement — commercial Gas Safe engineers
Gas solenoid valve replacement in the UK — replacement of faulty safety shut-off solenoid valves on commercial catering and plant room gas systems.
Gas Pressure Test — commercial Gas Safe engineers
Gas pressure testing in the UK — measurement of standing, working and burner pressures to verify safe, efficient operation of your gas installation.
FAQs about related services
Can I book related commercial gas services with my gas pipe sizing investigation in the UK?+
Yes — when our engineer attends in the UK for gas pipe sizing investigation, they can also carry out boiler servicing, gas tightness testing, interlock work, pipework or emergency repairs in the same visit, saving you a second call-out fee.
Do you cover all of the related services across the UK?+
Yes. Every service listed in the "related commercial gas services" section is delivered by our own Gas Safe registered commercial engineers throughout the UK and the surrounding areas — no subcontractors.
Will I get one combined quote for gas pipe sizing investigation and any related work in the UK?+
Yes. Tell us what you need when you book and we'll send a single fixed written quote covering gas pipe sizing investigation plus any additional commercial gas works at your the UK premises.
Commercial Gas Safety Certificates We Issue Alongside Gas Pipe Sizing Investigation
Every CP-series certificate below can be completed on the same visit as your gas pipe sizing investigation.
CP42 Commercial Catering certificate
Annual gas safety for restaurants, cafés, hotels & pubs.
CP44CP44 Mobile Catering & LPG certificate
For food trucks, trailers & market stalls.
CP17CP17 Installation Certificate certificate
Required for every new commercial gas appliance.
CP15CP15 Plant Commissioning certificate
Mandatory for new commercial boilers & heaters.
CP16CP16 Testing & Purging certificate
For new or modified commercial gas pipework.
CP2CP2 Leisure Industry certificate
Caravans, motorhomes, boats & holiday parks.
FAQs about gas safety certificates
Which gas safety certificates can I get alongside gas pipe sizing investigation in the UK?+
On the same visit in the UK we can issue CP42 (commercial catering), CP44 (mobile catering & LPG), CP17 (installation), CP15 (plant commissioning), CP16 (testing & purging) and CP2 (leisure industry) certificates wherever the work falls within scope.
Do landlords and managing agents in the UK need a CP-series certificate as well as gas pipe sizing investigation?+
In most cases, yes. Commercial landlords and managing agents in the UK have a legal duty under the Gas Safety (Installation and Use) Regulations 1998 to hold a current annual gas safety certificate for every commercial gas appliance, in addition to any one-off works.
Are the certificates issued in the UK accepted by insurers and Environmental Health?+
Yes. All certificates we issue in the UK are produced by Gas Safe registered commercial engineers and are accepted by insurers, Environmental Health Officers, the HSE, building control and managing agents.
Ready to Book Your Gas Pipe Sizing Investigation?
Secure your certificate today. Our Gas Safe registered engineers are available seven days a week with same-day service as standard.
Starting from £150 + VAT for 1 appliance • Same-day service available
Gas Pipe Sizing Investigation by area
Our Gas Safe registered engineers deliver gas pipe sizing investigation across London, the M25 and the Home Counties. Pick your nearest area for local response times and pricing.