PlumbReviseFull plumbing and gas ACS lessons, 4,400+ exam-style questions, mock exams and real on-site scenarios, with every answer fully worked and explained. Built for UK students and engineers.
Pick your path and jump straight in. A free tier to get you going; Premium unlocks the full gas ACS depth.
CCN1, CENWAT, CPA1 and the rest — built for your domestic gas assessments.
Start Level 2 & 3Cold & hot water, heating, drainage, the science and safe working.
Start New to the tradeCSCS card, your first job, the qualifications map and on-the-tools basics.
StartOr grab the field tools & calculators — gas rate, ventilation, CO/CO₂ and more — or start with the free guides on ACS modules, procedures and routes into the trade.
25 questions in each set, with explained answers. No signup needed.
Drill a topic, sit a timed mock, or let weak-spot review resurface what you keep missing — every mode ends in a fully worked answer.
Work a module question by question, with the full worked answer after every pick.
Choose a practice length and optional timer, then use the worked answers to plan what to revise next.
On-site judgement questions — what would you actually do first?
Questions you miss come back around until they stick.
Gas rate, ventilation, CO/CO₂ and more — handy on the job, not just in the exam. Open the field tools
One number that climbs as your recall improves — so you know when you’re ready to book the real assessment.
Every answer comes with a clear, worked explanation — grounded in the Building Regulations Approved Documents, the Water Fittings Regulations and British Standards, not someone’s best guess. No £10k “job guarantee” hype, no filler — just solid practice that gets you exam-ready.
Routes in, what the qualifications mean, and the procedures candidates actually get tested on — written straight, no course-advert hype.
Apprenticeship, college or fast-track — what each route really involves and who suits which.
How to structure core gas safety revision before your ACS assessment week.
The metered gas-rate method step by step, with the numbers you compare against.
Try 25 free questions in each of 15 modules: CCN1 gas safety, G3 unvented hot water, every Level 2 plumbing module, the 18th Edition and CSCS site safety. A good range of revision notes, including CCN1, is free to read in full. Premium (£8.99/mo or £43.99/yr) unlocks timed tests on every module, every note and the full gas ACS depth.
Plumbing at Level 2 and 3, the domestic gas ACS — CCN1, CENWAT, CPA1, CKR1, HTR1, MET1, WRAS and G3 — plus the electrical 18th Edition and CSCS site safety.
Mainly plumbing theory and the gas ACS assessments. If the names are a blur, the Training route maps out Level 1, 2 and 3, Diploma vs NVQ, and where ACS and Gas Safe actually fit.
Both. The questions suit first-timers building up and engineers brushing off the rust before reassessment.
Free modules never need a card or an account — jump in and see how you score.
Start practising