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.
Posted on Google
Ricky Matthews
5 October 2026
Trustindex verifies that the original source of the review is Google.
I'm the site Manager at St Paul's primary school and we have used ComGas for a whole refit of our water pipes. They was brilliant excellent friendly team never left a mess and the pipe work is so neat and tidy very professional work. We Also had an issue with our school Kitchen gas interlock system I called on Thursday morning they was there checking it over and parts ordered and fixed by Monday morning definitely recommend this company for any of your works especially in schools.
Posted on Google
steve brown
5 October 2026
Trustindex verifies that the original source of the review is Google.
Comgas fit our central heating system six years ago and made a fantastic job of it .They have serviced it regularly every year ever since .
Matt has done the last two services for us and he is very thorough, he rectified a couple of small issues with the rads and is always pleasant and informative. He advices us of what he’s done and what he thinks will be required on our next years service.
We are happy to continue with their services and have found all the guys to be reliable and trustworthy.
Posted on Google
Julia Walker
30 September 2026
Trustindex verifies that the original source of the review is Google.
Paul Pharo turned up on an emergency,within minutes he gave us so much reassurance to a burst hot water pipe isolated went and got new parts and had the penthouse back up with hot water with minimal damage..
can’t thank him enough and the company Comgas
Posted on Google
Ian Chevalier
30 September 2026
Trustindex verifies that the original source of the review is Google.
First time we've used this company and it won't be the last. Very professional and efficient in everything they do and Matt was excellent in his knowledge and efficiency when dealing with our gas and plumbing problems.
Posted on Google
Kerryann Wood
25 September 2026
Trustindex verifies that the original source of the review is Google.
Really happy with the service! Matt came out to carry out our boiler service and was friendly, professional and did a great job. The office team were also lovely and really helpful when arranging everything. Would definitely recommend and use them again. Thank you!
Posted on Google
Rob Haynes
14 September 2026
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Great service and the work completed in good time and professional company
Posted on Google
Ian Melville
11 September 2026
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Boiler service today engineer Matt on site, again great job very thorough clean and polite would recommend Comgas very professional outfit lovely staff. 👍🛠
Posted on Google
Bazmac
8 September 2026
Trustindex verifies that the original source of the review is Google.
We use Comgas for our gas and water and Matt does a monthly check on the systems.
Always a pleasure do deal with.
Chloe in their office is really helpful with all enquiries
Barry
Nower House
Posted on Google
Lynn Brooks
8 September 2026
Trustindex verifies that the original source of the review is Google.
Highly recommend. I think the engineers name was Matt, came to service my boiler, friendly and got on with the job quickly and efficiently.
Rated 5.0 out of 5 from 75 Google reviews.
"Really happy with the service! Matt came out to carry out our boiler service and was friendly, professional and did a great job."
Kerryann, Google review, September 2026
"First time we've used this company and it won't be the last. Very professional and efficient in everything they do…"
Ian, Google review, June 2026
"…ended up coming to my place of work and sorting an old heating system that hadn't worked for years in a car showroom & workshop. Great team of guys"
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.
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