New bathroom pipework, a kitchen refit, an outside tap, or a water supply that needs reviewing before other work goes ahead — we plan and install domestic plumbing properly, considering the whole property's water distribution rather than one fitting in isolation. Covering Farnham, Guildford, Godalming, Farnborough, Fleet and Camberley.
Plumbing planned around the whole property, not one fitting.
This page covers planned domestic plumbing — installing, upgrading or extending the pipework and fittings that supply water around a property. That includes new bathrooms and kitchens, additional outside taps, upgraded pipework during a renovation, and reviewing a property's water distribution before other work depends on it. If something has already failed, such as a leak, a burst pipe, a blockage or no water, that's an urgent fault rather than planned work, and it's covered on our Plumbing Repairs page instead.
This work suits homeowners planning a new bathroom, kitchen or extension that needs plumbing designed in from the start; landlords and letting agents upgrading a rental property's plumbing between tenancies; and property managers coordinating planned plumbing work as part of a wider refurbishment.
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Planned plumbing work
Pipework planned around the property, not added on top of it.
When we plan new plumbing work, we look at the existing water distribution, pressure and isolation arrangements first, rather than simply adding a new branch to whatever pipework happens to be nearest.
Water Distribution & Pressure
How hot and cold water is distributed around a property affects flow rate, pressure at each outlet, and how quickly hot water reaches a tap that's a long run from the cylinder. We look at the existing distribution before adding new pipework.
Existing pipe sizes, routing and material assessed before adding new branches
Incoming mains pressure checked before installing pressure-dependent fittings such as a mixer shower
Pipework feeding the point of use checked when flow is poor at a specific outlet
Existing cylinder and tank arrangement reviewed at summary level as part of wider plumbing projects
Every property should have a clearly identified main stopcock, and ideally isolation valves at individual appliances and outlets, so a single fitting can be shut off without cutting water to the whole property.
Main stopcock location identified and checked
Isolation valves fitted at individual appliances and outlets where missing
Older properties assessed for inadequate isolation provision
Improved isolation planned in as part of wider plumbing work
Bathroom and kitchen installations carry the highest concentration of plumbing connections in most homes, usually planned around a fixed layout such as a new suite, a repositioned sink, or additional outlets.
Pipework planned around the confirmed bathroom or kitchen layout
Runs positioned to be accessible for future maintenance
Pipe sizing suited to the fittings served, including where several outlets may run at once
Coordination with other trades during a wider renovation
An outside tap needs a dedicated supply taken from an appropriate point on the internal pipework, with isolation and a way to drain it down before winter to avoid a frozen and split pipe.
Dedicated supply taken from an appropriate internal connection point
Isolation valve fitted to the external supply
Drain-down arrangement to prevent freezing and pipe splits
Connection point chosen so it doesn't compromise pressure or flow elsewhere
Copper, push-fit plastic and PEX-type pipework are all in current use, each with genuine advantages depending on the application. Much of the ComGas operating area also sits on hard water, which affects pipework and appliances over time.
Copper, push-fit plastic and PEX-type pipework specified to suit each run
Material chosen for exposed, high-heat or concealed applications
Hard water considerations discussed for pipework, cylinders and appliances
Water treatment options considered as part of wider planned work
Low pressure at one outlet is usually the pipework, not the mains supply.
How hot and cold water distribution is laid out affects flow rate, pressure at each outlet, and how quickly hot water reaches a tap that's a long pipe run from the cylinder. When we plan new plumbing work, we look at the existing distribution first — pipe sizes, routing and material — rather than simply adding a new branch to whatever pipework happens to be nearest.
Low pressure or poor flow at a specific outlet is often a symptom of pipework sized for a different era of usage, such as narrow-bore pipe feeding a modern shower, or a long unsupported run losing pressure over distance. Before installing new fittings that depend on decent flow, such as a mixer shower or multiple outlets running at once, we check the incoming mains pressure and the pipework feeding the point of use, so the new installation performs as expected rather than being blamed for a supply problem it inherited.
Existing pipe sizes, routing and material assessed before new work is planned
Incoming mains pressure checked before installing pressure-dependent fittings
Pipework feeding the point of use checked before a supply is blamed for a local problem
Distribution reviewed as a whole rather than treating each outlet in isolation
Reviews from real ComGas customers, shown as submitted through Google.
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Lucie Victoria
15 May 2025
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Excellent service, highly recommend
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James Mowat
30 April 2025
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Incredible service — problems fixed perfectly once again.
Lee, Paul and the team at COMGAS are fantastic. They arrived on time and got straight to work, quickly identifying the root cause of the plumbing and heating issues I was experiencing.
The problems were diagnosed swiftly, I was kept fully informed throughout, and both issues were fixed with impressive speed and precision.
Having worked in the industry for nearly 20 years, I know how rare it is to find reliable, trustworthy, and genuinely skilled professionals — let alone a team this good.
I joked about it at the time, but it’s true: I had the best shower I’ve ever had in this house after they finished the job — and I’ve lived here for 10 years!
I honestly couldn’t ask for more and can’t recommend COMGAS highly enough.
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Faz
31 March 2025
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ComGas replaced my boiler and water tank at short notice. So glad i used them. Thank you
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Laura Andrews
26 March 2025
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Lee came out to the school I work in to look at a problem with our heating, he diagnosed the issue and was able to fix it on the spot in a neat and tidy manor. Would highly recommend
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Chloe
26 March 2025
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I recently used Comgas for a gas and heating service, and I couldn't be more impressed! From start to finish, their team was professional, friendly, and highly knowledgeable. They quickly identified the issue with my heating system and explained everything in detail, offering both short- and long-term solutions.
The technician was punctual and took extra care to ensure everything was running smoothly. I really appreciated their attention to detail and how they made sure to clean up after the work was completed. My home is now warm and cozy, all thanks to their expert service. I highly recommend Comgas for anyone looking for reliable, efficient, and trustworthy gas and heating professionals!
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Bec Newey
8 July 2024
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Messaged Lee on a Sunday evening with request. Instant reply that evening and engineer came next day. Polite, professional and helpful. Thorough investigation and speedy resolution to a leak with sink in wc. Happy customer.
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P Duffy
2 April 2024
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Scott and the team have served me well over several years. Skilled craftsmen. Dependable careful and very cosy-effective. I highly recommend them.
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Cilla Trout
22 March 2024
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Definitely recommend friendly reliable service
Scott was helpful and reassuring regarding our boiler answered our concerns and explained the problem and best course of action thank you for your advice
Residential plumbing questions
Frequently asked questions.
If you have a current fault such as a leak, burst pipe, blockage or loss of water, that's covered on our Plumbing Repairs page, which is set up for urgent response rather than planned scheduling.
No. This page covers planned plumbing installation and upgrade work — new bathrooms, kitchens, pipework and outside taps. If you have a current fault such as a leak, burst pipe, blockage or loss of water, that's covered on our Plumbing Repairs page, which is set up for urgent response rather than planned scheduling.
Can you fit a new bathroom or kitchen as part of a wider renovation?
Yes. We install the plumbing pipework and connections for new bathrooms and kitchens, working around the layout confirmed for the room and coordinating with any other trades involved in the renovation.
Why is my water pressure low at just one tap or shower?
This usually points to the pipework serving that specific outlet — pipe size, routing, or a long run losing pressure — rather than a fault with the incoming mains supply. We check the pipework feeding the point of use before recommending a fix.
Do you install unvented hot water cylinders?
Cylinder selection and installation, including vented and unvented systems, is planned to be covered in more depth on a dedicated hot water cylinders page. In the meantime, we assess your existing cylinder and tank arrangement at a summary level as part of wider plumbing work — get in touch to discuss your specific requirement.
Should I upgrade my pipework if I'm not changing any fittings?
Not usually as a standalone project, but it's worth reviewing pipework condition and sizing whenever other work is planned nearby, such as a bathroom refit or an extension, since it's far more disruptive to address afterwards than at the same time.
Does hard water actually affect my plumbing?
In this region, yes, over time. Hard water contributes to limescale build-up in pipework, cylinders and appliances, which can reduce flow and shorten the working life of fittings. We can discuss water treatment options where it's relevant to a planned project.
What pipe material will you use for my installation?
It depends on the specific run and location — copper, push-fit plastic and PEX-type systems are all in current use, each suited to different applications. We specify what's appropriate for each part of the installation rather than using one material throughout regardless of context.
