Do I need a power flush before a new boiler is installed?

A new boiler needs clean system water to work properly and to keep its manufacturer guarantee valid. We assess the condition of your system at the survey and recommend either a chemical clean or a full power flush, depending on how much sludge is in the radiators.

Will you register the boiler guarantee for me?

Yes. Swift 24-7 registers the manufacturer guarantee, completes the Benchmark commissioning checklist and notifies Building Control through Gas Safe, so all the paperwork is done when we leave.

Can you move my boiler to a different room?

Usually, yes. Moving a boiler depends on where the new flue can exit, where the condensate pipe can drain and how the gas supply can be routed. We check all three during the survey before quoting.

Is my old boiler worth repairing instead?

Sometimes it is. If the repair is minor and the boiler is in good condition, repairing it is often better value. If the boiler is old, unreliable and parts are hard to find, replacement usually costs less over the next few years. We give you an honest recommendation either way.

Boiler Installation in South West London

Boiler installation in South West London

Swift 24-7 Plumbers installs new gas combi, system and regular boilers in homes across South West London. Every boiler installation starts with a survey, is quoted at a flat rate, is notified to Building Control through Gas Safe, and is covered by our 12-month workmanship warranty.

Which boiler is right for your home?

The right boiler depends on how many bathrooms you have, how many people use hot water at the same time, and whether your home already has a hot water cylinder. We look at all three during the survey, because the cheapest boiler on paper is not always the cheapest to live with.

Combi boilers

A combi boiler heats water on demand straight from the mains, so there is no hot water cylinder and no tank in the loft. Combi boilers suit flats and smaller houses with one bathroom, which describes a lot of the conversions and terraces in Putney, Wandsworth and Fulham.

System boilers

A system boiler heats a stored hot water cylinder but takes its water from the mains, so there are no loft tanks. System boilers suit family homes with two or more bathrooms, because several taps and showers can run at once without the pressure dropping.

Regular (heat only) boilers

A regular boiler works with a cold water tank in the loft and a hot water cylinder. Regular boilers are often the sensible choice in older houses with existing gravity-fed pipework, because replacing like for like avoids disruptive pipe changes.

What a Swift 24-7 boiler installation includes

Home survey. We check your heat demand, hot water use, gas supply, flue route and condensate drain, then recommend the right boiler size rather than the biggest one.
Flat rate quote. You get one fixed price for the agreed work, so you know exactly what you are paying for before we start.
Removal of the old boiler. The old boiler and any redundant pipework are removed and disposed of responsibly.
System clean. We clean the heating system and add inhibitor, because sludge from an old system shortens the life of a new boiler and can void its guarantee. A magnetic filter is fitted to keep the water clean.
Controls. We fit a programmer and room thermostat that meet current Building Regulations, with smart control options if you want to manage your heating from your phone.
Commissioning and paperwork. The boiler is commissioned, the Benchmark checklist is completed, the installation is notified to Building Control through Gas Safe, and the manufacturer's guarantee is registered for you.

How long does a boiler installation take?

A like-for-like boiler swap usually takes one day. Moving a boiler to a new position or converting a regular system to a combi usually takes two to three days, because pipework, the flue and sometimes the gas supply need to change. We confirm the timescale in your quote so you can plan around it.

Why homeowners and landlords choose Swift 24-7

Flat rate pricing with no surprises on the final bill.
A 12-month workmanship warranty that covers call backs at no cost to you, on top of the manufacturer's guarantee.
Qualified, DBS-checked engineers and full public liability cover up to £5 million.
Honest advice: if your existing boiler can be repaired economically, we will tell you.

Trusted by homeowners across South West London

“Top-knotch service from Gavin and his company. Excellent communication throughout. The job was to replace the old boiler thermostat and it went speedily and well. Gavin is cheerful, efficient and very helpful. I'm definitely having him back to install my new bathroom.”

Christine TaylorBoiler thermostat replacement

“Gavin came round to take a look at our leaky toilet at short notice. He came back and fixed it two days later and did a great job. We are very happy with the work he did and will definitely call him again if we need a plumber.”

Karen HewisLeaking toilet repair

“Gavin is always on time and so helpful in giving you information in 'layman's language' to understand the problem you are facing.”

Sally Price