Age & limescale
Cylinders silently scale up and corrode. Performance drops long before total failure — and total failure always seems to land at 8am on day one of term.
PBSA / Student Accommodation · Estates · Nationwide
Every student complaint starts the same way.Cold shower. 8am. No hot water.
It almost always traces back to a failing hot water cylinder no one inspected. We complete thousands of G3 cylinder condition reports across the UK — so you find the problem before term starts, not after the calls come in.
Gas Safe Registered 542554 · Avetta · SafeContractor · Constructionline Gold · Prosure
The Problem
Unvented cylinders fail in predictable ways — usually at the worst possible time.
Term-start hot water failures aren't bad luck. They're the outcome of cylinders nobody inspected — and the cost is complaints, emergency callouts, and reputational damage with students, parents and university partners.
Failed immersion heaters
Burnt-out elements and faulty thermostats are the single biggest cause of mid-term hot water complaints in student accommodation.
Expansion vessel & PRV/T&P faults
Safety devices fail quietly. A waterlogged expansion vessel or weeping T&P valve is a compliance and safety issue before it's a comfort one.
No inspection history
Most portfolios have zero condition data on their unvented cylinders. You can't plan replacements you can't see — so everything becomes reactive.
What it covers
What is a G3 cylinder condition report?
G3 of the Building Regulations covers unvented hot water storage systems. We inspect and document the condition of Direct and Indirect unvented cylinders — safety devices (expansion vessel, T&P relief valve, tundish, expansion/PRV), immersion heaters, controls, pipework, and the overall condition of the asset — and we produce a written condition report flagging anything at or near end of life.
Direct unvented
Heated only by built-in electric immersion heaters inside the cylinder. Simple, common in flats and smaller blocks — and highly dependent on immersion and thermostat health.
Indirect unvented
Heated primarily by a boiler via an internal coil, often with an immersion as backup. Found across most PBSA plant rooms — more components, more failure modes, more to inspect.
The Deliverable
A written report on every cylinder we inspect.
What we check
Every report covers, at minimum:
- Expansion vessel charge & condition
- Temperature & pressure relief valve
- Tundish & discharge pipework
- Immersion heater(s) & thermostats
- Cylinder condition & age
- Controls & wiring
- Pipework & isolation
- Compliance documentation & asset record
1,000s
G3 cylinder reports completed nationwide
24/7
Emergency cover, 365 days
542554
Gas Safe registration
UK
Multi-site capability
Gas Safe Registered 542554 · Avetta · SafeContractor · Constructionline Gold · Prosure
Free review
Book your free G3 cylinder condition review
No obligation, no sales pitch — a written report on the condition of your hot water cylinders. Limited free reviews each month.
Gas Safe 542554 · Fully accredited
Frequently asked questions
Find the failing cylinder before term starts.
Book a free G3 cylinder condition review — written report, no obligation.