What are your opening hours, and can you help out of hours?

Our published hours are Monday to Friday, 8:30am to 5pm, and that's when the phones are answered and jobs are booked. We're honest that we don't run a round-the-clock emergency line, so if you're planning ahead, call during those hours on 07516 118198 and we'll get you booked in.

What does "commissioning" a boiler actually involve?

Commissioning is setting the boiler up correctly for the property rather than just switching it on: checking gas or oil pressure and flow rates, setting flow temperatures, testing safety devices, balancing the system, and completing the manufacturer's Benchmark checklist. Skipping this properly is one of the most common reasons warranty claims get refused later.

What paperwork do I get once the job's finished?

You'll get a Benchmark commissioning checklist for the boiler, a building notice or Building Control completion certificate for notifiable work, manufacturer warranty registration confirmation, and a Gas Safe (or OFTEC) record of the work. Keep these together — they're what a future buyer's solicitor or a warranty claim will ask for.

What's a CP12 and do I need one as a landlord?

A CP12 (Landlord Gas Safety Record) confirms every gas appliance in a rented property has passed an annual safety check by a Gas Safe registered engineer. It's a legal requirement before letting and at each renewal, a copy has to go to tenants, and it needs to be renewed every 12 months without a gap.

What actually happens on install day?

The engineer isolates the gas or oil supply and water, removes the old boiler, fits and pressure-tests the new one, connects the flue and condensate, and commissions the system. For a straight swap this is usually one day; a conversion, relocation, or cylinder change can run into a second depending on the pipework involved.

Is there mains gas across Marksbury?

Most of Marksbury is on mains gas, though pockets towards Timsbury and Priston can be off-grid. We'll confirm what's at the property as part of the survey.

Marksbury's Local Landlord Gas Safety Certificates Specialist

Homeowners, landlords and smallholders tend to ask different questions about landlord gas safety certificates: homeowners want comfort and running costs sorted, landlords need compliant paperwork they can hand to tenants and agents, and rural owners often need to weigh oil against other fuels. We cover all three from 24 Bristol Road, Radstock BA3 3EE as a Gas Safe registered and OFTEC registered firm, so the advice is tailored to what you actually need the system to do. Terrain is level, which matters for condensate runs and tank siting.

07516 118198 Book a survey

BA2 · Somerset · 5 mi from Radstock · A39

Heating system upgrade in Marksbury, very hard limestone water area — level setting

Reading the property before pricing the work

Stone cottages and farmhouses around here were mostly built long before central heating existed, so pipework and boiler locations have usually been retrofitted at some point, sometimes more than once. Thick stone walls, uneven floor levels and low ceilings can all affect where a boiler or cylinder can practically go, and older stonework doesn't always take fixings the way modern block or brick does. We work around those constraints on site rather than assuming a straightforward install. Most of what we open up here is stone village homes, which dictates flue routes and pipe sizing. Marksbury is roughly 5 miles from our Radstock base via the A39. Typical property stock here: stone village homes. Marksbury sits in the Somerset BA2 postcode and is part of our weekly run, so local response is quick. Repair calls in Marksbury usually get a same-week visit, with most common faults fixed on the first attempt.

Also covering the lanes around Marksbury

Beyond Marksbury we're frequently on jobs in Timsbury (BA2), Priston (BA2), Corston (BA2) and Farmborough (BA2) — so spares, follow-ups and annual services are straightforward.

Proof, paperwork and accountability

Worcester Bosch Accredited

Qualifies your install for the full 10-year manufacturer guarantee* on supported models.

Checkatrade 9.9/10

362+ verified reviews from real customers across BA and BS postcodes.

OFTEC trained

Oil boilers, oil tanks and pipework — fully certified for off-grid installs and replacements.

Fixed written prices

No verbal-only quotes. You'll get the boiler model, controls and warranty in writing before we book.

The work, step by step

Gas Safe registered, CP12 issued same day
Tightness test, combustion analysis and flue checks
Tenant access arranged by text or phone
Several properties aligned to one renewal date
Free written quote, no obligation
Local aftercare from a 5-mile base

Questions before you book

What are your opening hours, and can you help out of hours?: Our published hours are Monday to Friday, 8:30am to 5pm, and that's when the phones are answered and jobs are booked. We're honest that we don't run a round-the-clock emergency line, so if you're planning ahead, call during those hours on 07516 118198 and we'll get you booked in.
What does "commissioning" a boiler actually involve?: Commissioning is setting the boiler up correctly for the property rather than just switching it on: checking gas or oil pressure and flow rates, setting flow temperatures, testing safety devices, balancing the system, and completing the manufacturer's Benchmark checklist. Skipping this properly is one of the most common reasons warranty claims get refused later.
What paperwork do I get once the job's finished?: You'll get a Benchmark commissioning checklist for the boiler, a building notice or Building Control completion certificate for notifiable work, manufacturer warranty registration confirmation, and a Gas Safe (or OFTEC) record of the work. Keep these together — they're what a future buyer's solicitor or a warranty claim will ask for.
What's a CP12 and do I need one as a landlord?: A CP12 (Landlord Gas Safety Record) confirms every gas appliance in a rented property has passed an annual safety check by a Gas Safe registered engineer. It's a legal requirement before letting and at each renewal, a copy has to go to tenants, and it needs to be renewed every 12 months without a gap.
What actually happens on install day?: The engineer isolates the gas or oil supply and water, removes the old boiler, fits and pressure-tests the new one, connects the flue and condensate, and commissions the system. For a straight swap this is usually one day; a conversion, relocation, or cylinder change can run into a second depending on the pipework involved.
Is there mains gas across Marksbury?: Most of Marksbury is on mains gas, though pockets towards Timsbury and Priston can be off-grid. We'll confirm what's at the property as part of the survey.

Where to go from here

Finishing landlord gas safety certificates isn't the end of the relationship — if something doesn't feel right once the system's been running for a while, get in touch and we'll come back and look at it. Annual servicing afterwards keeps the guarantee valid and the system running as it should. A written quote follows the survey — no pressure, and no charge for the Marksbury visit. Access is lane access, so parking, spoil removal and delivery timing get planned in advance.

07516 118198 All services in Marksbury

Marksbury coverage and distances

County: Somerset
Postcode district: BA2
Settlement type: village
Nearest classified road: A39
Distance from our base: 5 miles (Radstock, BA3)
Typical building stock: stone village homes
Water hardness: very hard limestone water
Fuel availability: mains gas with off-grid pockets
Customer mix: homes alongside small commercial and agricultural premises
Nearby areas covered: Timsbury, Priston, Corston, Farmborough

Technical notes for this job type

Low-loss headers on larger or multi-zone systems

On a system with several heating zones or a boiler oversized relative to any single zone's flow requirement, a low-loss header hydraulically separates the boiler's primary circuit from the secondary zone circuits, so each side can run its own pump and flow rate without one interfering with the other. Without it, a zone valve closing on a multi-zone system can starve the boiler of flow or force excessive pump pressure through the remaining open zones. It's most relevant on larger properties or ones with commercial premises attached, where several distinct heating circuits — perhaps a shop unit and a flat above — share one heat source. Getting the header sized to the boiler's actual flow rate, not just fitted as standard, is what makes it work rather than just adding another connection.

Common boiler fault codes and what usually causes them

Most modern boilers display a fault code on the control panel when they lock out, and while the exact code differs between manufacturers, the underlying causes cluster into a small number of categories: low system pressure (often from a small leak or after bleeding radiators), ignition failure (a worn electrode, gas supply issue, or blocked condensate causing a safety shutdown), or a failed sensor reporting an implausible temperature reading. A condensate blockage or freeze specifically tends to show a distinct code from a genuine ignition fault, which is why checking the external condensate pipe for ice before calling out an engineer in a cold snap can sometimes resolve the issue without a visit at all. We ask for the exact fault code and any recent history — a bled radiator, a cold snap, a recent service — before attending, since it often narrows down the likely cause before we arrive.

LPG as an alternative to oil off the gas grid

Properties around Marksbury that sit off the mains gas network aren't limited to oil — bulk LPG, stored in an above-ground tank on a concrete base with the same OFTEC-style clearance and access rules as oil, runs standard gas-rated boilers with only a change of injector and pressure setting rather than a different boiler entirely. It suits households that want a gas hob and gas-style modulation rather than an oil burner's on/off firing pattern. The tank still needs delivery access for a tanker, which on some rural driveways is the deciding factor over oil. We check the access route for the largest realistic delivery vehicle before recommending LPG over oil, because a tank that can't be filled easily causes more disruption than the fuel choice was meant to solve.

Village lane access and van positioning for larger jobs

Village lanes around Marksbury are often single-track or tight two-way roads without dedicated off-street loading space, which affects how a larger job like a full system installation or an oil tank replacement is planned — the van needs somewhere to park close enough for repeated trips carrying equipment without blocking the lane for through traffic or farm vehicles. On a job involving a full radiator or pipework replacement, materials sometimes need staging over more than one visit rather than delivered all at once if there's nowhere secure to leave them on-site between visits. We check lane width and passing places when scheduling larger jobs in village locations, and plan van access and parking as part of the job rather than as an afterthought on the day.

Single-pipe circuits in older stone cottages

A lot of the stone cottages and farmhouses around Marksbury were plumbed decades ago on a single-pipe gravity circuit, where each radiator draws from and returns to the same loop rather than having its own flow and return. It works, but radiators furthest from the boiler receive water that's already cooled after giving up heat to the ones before it, so the far end of the house is always the coldest. Converting to a two-pipe layout means new pipe runs, which in a stone cottage often means chasing lime plaster or lifting flagstones — not a trivial job. Where a full rewire of the pipework isn't wanted, we sometimes improve balance instead by oversizing the radiators nearest the end of the run and fitting TRVs to hold back the ones nearest the boiler.

What voids or protects a Worcester Bosch extended guarantee

Worcester Bosch's longer guarantee periods on qualifying installations are conditional on the boiler being installed and commissioned by an Accredited Installer, on an annual service being carried out (by any Gas Safe registered engineer, not necessarily the original installer) within the required window each year, and on system water quality being maintained to the standard set out in their published guidance — meaning a system flush at installation, correct inhibitor dosing, and in hard water areas a scale reducer or filter as specified. Missing a single annual service, or installing without the required water treatment, can reduce cover back to the manufacturer's standard guarantee period even if the boiler itself has had no faults. Keeping the Benchmark record and service history together is what lets a claim be assessed quickly if it's ever needed.

Other boiler services in Marksbury

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