Electrical · Fault finding
RCD keeps tripping?
Understand RCD and RCBO trips, safe homeowner checks, weather and appliance patterns, and what a professional investigation should establish.
13 min read · Published 5 October 2026
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Guides &
Advice
Practical answers for London homeowners, designers and contractors planning electrical, plumbing and heating work.
Underfloor heatingHeating & boilersElectrical & rewiringPlumbing & renovationRegulations & certification
Latest guides
Written to answer a real planning or diagnostic question.
Hot water · Maintenance
Unvented cylinder servicing for London homes
Understand annual checks, expansion vessels, safety discharge, servicing costs and the difference between routine maintenance and fault diagnosis.
14 min read · Published 5 October 2026
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Heating · Troubleshooting
Why does my boiler keep losing pressure?
Understand hidden leaks, expansion vessel faults and discharge. Learn which observations are safe, why repeated topping up is not a repair, and what a proper investigation should establish.
12 min read · Published 5 October 2026
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Heating · Troubleshooting
Underfloor heating not working?
Understand cold zones, no flow and thermostat faults. Compare safe first checks for wet and electric systems, and what a proper assessment should cover.
15 min read · Published 5 October 2026
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Electrical · In-depth guide
Home lighting design for London renovations
Plan layers of light, LED strips, dimming and practical controls — from improvements in a finished flat to the first-fix decisions in a full renovation.
16 min read · Published 4 October 2026
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Plumbing & property protection · In-depth guide
Water leak protection for London homes
Compare leak sensors, flow monitoring and automatic shut-off — including the limits around filters, boosters, stored water and heating circuits.
16 min read · Published 4 October 2026
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Plumbing & water treatment · In-depth guide
Water filtration for London homes
Compare carbon filtration, reverse osmosis, storage, remineralisation and optional ionisers — with practical installation and maintenance advice.
15 min read · Published 4 October 2026
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Electrical & renovation · In-depth guide
Bathroom Electrics for a London Renovation
Plan lighting, ventilation, heating and equipment supplies together before your bathroom renovation reaches the tiling stage.
16 min read · Published 3 October 2026
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Electrical & renovation · In-depth guide
Kitchen electrics for a London renovation
Plan appliance supplies, sockets, island routes, layered lighting and installation stages before the kitchen is fitted.
15 min read · Published 3 October 2026
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Underfloor heating & renovation · In-depth guide
Retrofitting underfloor heating in an existing home
Compare installation methods, complete project costs, finished floor heights and the practical choices for London houses, flats and renovations.
16 min read · Published 3 October 2026
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Electrical & refurbishment · In-depth guide
Consumer unit replacement or full rewire?
Compare targeted repairs, consumer unit replacement, partial rewiring and a full rewire — with practical advice on assessment, cost, disruption and certification.
19 min read · Published 2 October 2026
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Heating & system design · In-depth guide
Smart heating controls for London homes
Understand boiler modulation, weather compensation and BUS communication — and how radiators, UFH and several manifolds can work as one coordinated system.
26 min read · Published 2 October 2026
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Plumbing & water treatment · Planning guide
Water softeners for London homes
Less limescale starts with the right specification. Compare system types, installation and running costs, cabinet space, flow and drinking-water arrangements.
15 min read · Published 1 October 2026
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Plumbing & water pressure · Diagnostic guide
Low water pressure in London homes
Start with the symptoms. Understand pressure and flow, make safe observations, and find out whether the next step belongs with a plumber, building manager or water supplier.
15 min read · Published 1 October 2026
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Plumbing & water pressure · Planning guide
Water pressure boosters for London homes
From compact pumps to whole-house systems: understand pressure, flow, accumulators, storage, hot-water compatibility and the checks that come before installation.
19 min read · Published 30 September 2026
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Plumbing & hot water · Planning guide
Vented to unvented hot-water conversion in London
What happens to the loft tanks? Can you keep the boiler? Understand mains pressure, cylinder sizing, safety and the complete installation before deciding.
17 min read · Published 30 September 2026
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Heating & boilers · Planning guide
Conventional to combi boiler conversion in London
Can you remove the cylinder and loft tanks? Understand the suitability checks, hot-water limits, installation stages and decisions before work starts.
14 min read · Published 28 September 2026
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Heating & boilers · Decision guide
When a London Heating System Needs a Powerflush
Cold radiators, cleaning methods and the checks that show whether powerflushing, balancing or a repair is the right next step.
12 min read · Updated 5 October 2026
Read the guideReal decisions
Useful before work beginsEach guide resolves a practical choice, risk or preparation question around a planned project.
Technical review
Checked by the PEP teamTechnical statements are reviewed against current practice and authoritative sources where rules are involved.
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