From heating circulation pumps to booster and drainage pumps, ComGas surveys existing performance and installs or replaces commercial pumps for offices, schools, care settings and other commercial buildings across Surrey and surrounding counties.
Commercial buildings rely on pumps in more places than is often obvious — circulating hot water and heating around a building, boosting mains water pressure to upper floors, and moving drainage or surface water where gravity alone cannot. This page covers general pump installation and replacement across plumbing and heating circuits. Where a pump is specifically part of a water-pressure-boosting package rather than a single circulation or transfer pump, that sits within our Booster Sets scope, which we can discuss separately; and where sealed heating-circuit pressure is maintained by a dedicated device rather than a pump, that is covered by our Pressurisation Units service.
A pump sized incorrectly for its circuit — whether over- or under-specified — tends to cause ongoing problems: excess noise and energy use, poor circulation at the far end of a circuit, or premature wear that leads to early failure. We assess the existing circuit, or the design if one has already been produced, before specifying a replacement or new installation, rather than substituting an existing pump on a like-for-like basis without checking whether it was ever correctly matched to the system.
ComGas installs and replaces commercial pumps within plumbing and heating circuits for buildings across Surrey and surrounding counties, coordinating this work with wider plumbing, heating or plant room projects where relevant.
ComGas Services UK Ltd
Commercial pump installations from Farnham, Surrey.
We assess the existing circuit and pump performance before specifying a replacement or new installation.
Installation and replacement of circulation pumps within LTHW and hot water heating circuits.
Pumps that boost or transfer water within plumbing systems, distinct from a dedicated water-pressure-boosting booster set package.
Pumps moving drainage or surface water where gravity fall alone is not available or sufficient.
Assessing an existing pump's performance against its circuit before deciding whether replacement, or a different specification, is the right next step.
Planned. Professional. Practical.
Before specifying any pump, we assess the circuit it will serve — pipe lengths, fittings, height to be overcome and the flow rate actually required — rather than assuming a like-for-like replacement is automatically correct. Where an existing pump is being replaced because it has failed or is underperforming, we consider whether the original specification was right for the circuit in the first place.
Installation is coordinated with any related heating, plumbing or drainage works, and sequenced around your operations where the building is occupied. Once installed, we check the pump's performance against the circuit before handover, so any imbalance is picked up before it becomes an ongoing problem.
Pumps often sit in plant rooms or risers with limited access, and noise or vibration can be a genuine concern in occupied buildings such as offices, schools or care settings. We consider access for future maintenance, noise transmission and how the pump interacts with the rest of the circuit — including any controls or pressurisation equipment already in place — before finalising a specification.
Every pump installation is scoped to the specific circuit and building. We assess actual flow and access requirements rather than applying a standard specification regardless of the installation.
Leisure & Hospitality
ComGas delivered a complete water-boosting and hot-water plant upgrade at Bourne Club, supporting new changing and shower facilities with an accumulator-based boosted-water system, twin high-recovery unvented…
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Education
Lowther Primary School, Barnes, London — removal of the existing gas boiler installation and replacement with an air source heat pump, complete replacement of the heating…
View projectGenuine reviews from ComGas customers, submitted through Google.
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"
James, Google review, October 2025
Common questions about pump sizing, replacement and how this service relates to booster sets and pressurisation units.
Talk to the pump installation teamNot necessarily. This page covers general circulation, transfer and drainage pump installation. A booster set is a specific water-pressure-boosting package, which we scope separately — let us know if that's what you need and we can advise on the right approach.
No. A pressurisation unit maintains pressure in a sealed heating circuit and is a distinct piece of equipment from a circulation pump, even though both often sit in the same plant room. See our dedicated Pressurisation Units page for that specific service.
We can, but we assess the circuit first to confirm the original specification was actually correct. If the existing pump was over- or under-sized, a like-for-like replacement simply repeats the same issue, so we'll flag that before quoting.
This can result from an incorrectly sized pump, air in the system, worn components, or how the pump is mounted and connected. We assess this as part of any survey before recommending replacement or remedial work.
Yes. Pump work is frequently part of a larger heating or plumbing project, or a plant room upgrade, and we coordinate the pump scope with that wider work so it is delivered as one sequenced project.
Yes. Alongside heating circulation and water booster pumps, we install and replace drainage and surface water pumps where gravity fall alone is not available, coordinating this with our wider commercial drainage work.
Tell us about the circuit involved, the symptoms you've noticed, and any access or timescale constraints. We can advise on the right approach and arrange a survey where appropriate.
For an urgent enquiry, please call our office directly.
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Message the ComGas office on 01252 214120.