Low pressure in Harlow? Heating upgrades sorted properly
Boiler dropping pressure in Harlow? If you're topping up more than once a month, you have a leak somewhere — often tiny and hidden. We track it down rather than just keep refilling. Heating upgrade work in Harlow usually means power-flushing, smart controls, TRVs or radiator replacements — we'll tell you straight which actually move the dial for your system.
You're not getting a call centre — you're getting Grant.
The same engineer quotes the job, does the work, and answers the phone afterwards if anything's not right.
Gas Safe Registered
Every gas job legally signed off
18+ years on the tools
Grant has been fixing boilers in Harlow since before smart thermostats existed.
Real human on the phone
Most calls answered the same day, often within the hour.
Locally based in Harlow
Not a national chain — your local engineer, your local prices.
Boiler dropping pressure in Harlow? If you're topping up more than once a month, you have a leak somewhere — often tiny and hidden. We track it down rather than just keep refilling. Heating upgrade work in Harlow usually means power-flushing, smart controls, TRVs or radiator replacements — we'll tell you straight which actually move the dial for your system.
What's included
Power Flushing
Deep clean of central heating to remove sludge and restore efficiency.
Learn moreRadiator Replacement & Relocation
Swapping tired old radiators or moving them for new layouts.
Learn moreSmart Thermostat Installation
Hive, Nest, Tado, Honeywell — fitted, set up and explained.
Learn moreMagnetic System Filter Fitting
MagnaClean or Spirotech filters to protect your boiler from sludge.
Learn moreAbout Harlow
Predominantly 1950s–70s post-war housing with a mix of terraces, semis, and 60s-built flats. Pockets of older stock around Old Harlow.
- Original 1960s flats often have undersized gas supply pipes that limit modern combi performance
- Older Old Harlow properties frequently have low mains water pressure that affects combi choice
- Many 60s/70s back boilers still in service — our regular work involves removing these and reinstating fireplaces
How we handle heating upgrades in Harlow
Pre-flush check
Radiator survey, pump and motorised valve check, and a sludge sample where possible.
Flush
High-flow magnetic flushing unit run through the system, radiator by radiator, until water runs clear.
Inhibitor & filter
Fresh corrosion inhibitor added; magnetic filter fitted to keep the system clean going forward.
Performance check
Heating fired up, all radiators rebalanced, and the difference measured.
Our approach to heating upgrades in Harlow
When you book us for heating upgrades in Harlow, you get a real, named engineer turning up — not a sub-contractor.
We know the housing in Harlow and what tends to go wrong with it, which means fewer surprises mid-job.
Fixed prices in writing before any work starts. The number you agree is the number you pay.
What you get when you book us
- Boiler Plus compliant installs
- BTU sizing calculations for radiator changes
- Sentinel X100 inhibitor used as standard
- MagnaCleanse and Kamco flushing equipment
- Rebalancing included with every flush
Quick answers on heating upgrades in Harlow
Is it dangerous to keep topping up?▾
Not immediately — but the cause needs finding. Repeated top-ups mean fresh oxygenated water keeps entering the system, which corrodes radiators and pumps from the inside.
Where do hidden leaks usually hide?▾
Pressure relief valve discharging outside, perished pump seals, pinhole leaks at radiator valves, or a failing expansion vessel. Each one has a different fix.
Do I really need a power flush?▾
If radiators have cold patches, your boiler is noisy, or you're fitting a new boiler to an older system, yes. Otherwise a chemical flush and magnetic filter is often enough.
How much does a power flush cost?▾
Typically £450–£750 depending on system size and number of radiators. We give a fixed price after a quick survey.
Related services in Harlow
Boiler installs in Harlow
Worcester, Vaillant, Ideal and Glow-worm boilers fitted by Gas Safe registered engineers — sized properly, fitted neatly, and backed by manufacturer warranties of up to 12 years.
Boiler repairs in Harlow
No heating or hot water? We respond fast — usually same day — diagnose properly, and give you a fixed price before any work starts.
Boiler servicing in Harlow
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Plumbing in Harlow
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- Heating Repairs & Upgrades
- Coverage
- Harlow (CM17, CM18, CM19, CM20) and surrounding areas
- Response time
- Same-day where possible
- Credentials
- Gas Safe registered, fully insured, 12-month workmanship guarantee
- Pricing
- Fixed written quotes, no surprise extras
Roughly what you'll pay in Harlow
These are honest starting prices for jobs we do every week. Final quote depends on your property — we'll always confirm in writing before any work starts. No surprise add-ons.
| Job | Price |
|---|---|
Single radiator swap supply & fit, like-for-like | from £180 |
Smart thermostat install (Hive/Nest/tado) wired in and configured | from £220 |
Full magnetic filter & power flush extends boiler life, lower bills | from £450 |
TRV upgrade per radiator fitted while system drained | from £45 |
Prices include VAT. Parts quoted separately and shown on your written quote.
Other ways Harlow customers find us for heating upgrades
Same engineer, same fixed pricing — different question, different answer.
Villages near Harlow we also cover
Fix the pressure drop in Harlow
Free written quote, no obligation. Real engineer, fixed price, fast response.