Plumbers University

Plumbers University

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Free plumbing guides

Plumbing tips & tricks, free.

Simple, step-by-step UK guides written by plumbing teachers. Fix it yourself — or learn to do it for paying customers.

Cutaway of a tap showing the washer and ceramic disc cartridge

Taps

How to fix a dripping tap (UK guide)

Stop a dripping tap yourself. Find out if your tap has a washer or a ceramic disc, which parts to buy and how to fix it step by step.

9 min read

Indoor stopcock under a kitchen sink and an outdoor stopcock cover

Leaks & emergencies

How to find and turn off your stopcock

Where is my stopcock? Learn where UK stopcocks are usually found, how to turn them off, what to do if one is stuck, and about outside and shared stopcocks.

8 min read

Plumber fitting a new mixer tap to a bathroom basin

Taps

How to replace a basin mixer tap

Replace a bathroom basin mixer tap step by step: removing the old tap, fitting flexible tails, the seals you must not forget, and testing for leaks.

11 min read

Close-up cutaway of a compression fitting showing the brass olive

Fittings

Compression fittings explained (and how to stop them leaking)

How a compression fitting works, why the olive is the seal, how tight to do it up and how to fix a weeping compression joint.

9 min read

Cutaway of a UK isolation valve showing the ball and slot

Fittings

UK isolation valves explained

What a UK isolation valve is, how to tell if it is open or closed, the different types and how to fit one with compression joints.

8 min read

Inside of a toilet cistern showing the fill valve and flush valve

Toilets

How to fix a running toilet

Toilet keeps running into the pan or overflow? Find the cause with a simple test and fix the fill valve or flush valve yourself.

9 min read

Plumber removing a sink trap to clear a blockage

Drains & wastes

How to unblock a sink without calling a plumber

Unblock a kitchen or bathroom sink with a plunger, by clearing the trap, and what not to pour down the drain.

8 min read

Radiator key in a bleed valve with a cloth catching water

Radiators

How to bleed a radiator

Radiator cold at the top? Learn how to bleed a radiator safely with a radiator key, in what order, and what to check afterwards.

7 min read

New plumber talking with a customer at the front door

Careers

How to become a plumber in the UK (without wasting years)

The real routes into plumbing in the UK: apprenticeships, colleges, online learning and practical courses. How to start earning from small jobs sooner.

10 min read

Plumbing tools laid out: spanners, grips, pipe cutter and tape

Careers

The essential plumber's tool bag for beginners

The plumbing tools you actually need to start: spanners, pipe cutters, grips and more, what each does and what you can buy later.

8 min read

Torch shining on pipes under a kitchen sink to find a leak

Leaks & emergencies

Leak under the kitchen sink? How to find and fix it

Water in the cupboard under your sink? Find out if it is the tap, the tails, the waste or the trap, and how to fix each one.

9 min read

Diagram of a UK home water system showing stopcock and pipes

Leaks & emergencies

Burst pipe? What to do right now

A burst pipe can flood a home fast. The first five things to do, how to make a temporary repair and how to stop it happening again.

8 min read

Outside garden tap on a brick wall in cold weather

Leaks & emergencies

Frozen pipes: how to thaw them safely

No water in winter? How to find a frozen pipe, thaw it safely without damage and protect your pipes and outside tap from frost.

7 min read

Modern kitchen mixer tap fitted on a stainless steel sink

Taps

How to replace a kitchen tap

Change a kitchen sink tap yourself: choosing a tap, removing the old one in a tight space, fitting the new one and avoiding leaks.

10 min read

A pair of chrome pillar taps on a white basin

Taps

How to replace pillar taps

Change old pillar taps on a basin or bath: tap connectors, fibre washers, top hat washers and the seals that stop leaks.

9 min read

Brass plumbing fittings, copper pipe and a roll of PTFE tape

Fittings

PTFE tape vs jointing paste: when to use each

Where PTFE tape works, where it does not, how to wrap it the right way and when to use jointing compound instead.

7 min read

Cutaway of a push-fit fitting showing O-ring and grab ring

Fittings

Push-fit plumbing fittings explained

How push-fit fittings seal, why you need pipe inserts, how to cut and mark plastic pipe and how to avoid push-fit leaks.

8 min read

Close-up of a flexible tap tail nut showing the rubber washer

Fittings

Flexible tap tails (flexi hoses) explained

What flexi tap tails are, the sizes used in the UK, how the rubber washer seals and how to fit them without kinks or leaks.

7 min read

Cutaway of a toilet pan connector at the soil pipe

Toilets

How to unblock a toilet

Unblock a toilet with a plunger or toilet auger, what never to do, and how to tell if the blockage is in the main drain.

7 min read

Modern toilet fill valve inside a cistern

Toilets

How to replace a toilet fill valve

Replace a side-entry or bottom-entry toilet fill valve: choosing the right one, where the washers go and setting the water level.

9 min read

Plumber using a torch to look for a hidden leak behind pipes

Leaks & emergencies

How to find a hidden water leak in your home

High water bill, damp patch or the sound of running water? Use the water meter test and simple checks to track down a hidden leak.

9 min read

Indoor and outdoor stopcocks in a UK property

Leaks & emergencies

Shared stopcocks and shared water supplies explained

Do you share a stopcock with your neighbours? How shared supplies work, who is responsible and your options for your own supply.

7 min read

Ceramic disc cartridge being removed from a mixer tap

Taps

How to replace a ceramic disc tap cartridge

Fix a dripping quarter-turn or mixer tap by replacing the ceramic disc cartridge. How to identify, remove and fit the right one.

8 min read

Isolation valve being opened with a flat screwdriver

Taps

Low water pressure from your taps: causes and fixes

Weak flow from a tap or the whole house? Check aerators, isolation valves, stopcocks and system type to find and fix low pressure.

8 min read

New outside garden tap fitted to a brick wall with a hose

Taps

How to fit an outside garden tap

Fit an outdoor garden tap with a kit: the double check valve rule, isolation valve inside, drilling the wall and frost protection.

10 min read

Chrome bath shower mixer tap on a white bath

Taps

How to replace bath taps

Change bath pillar taps or fit a bath shower mixer: access under the bath, ¾ inch connections, seals and testing.

10 min read

Close-up showing the rubber seal between a tap base and basin

Fittings

The SSS rule: Solid – Seal – Solid

The simple rule that explains every plumbing joint: between two solid parts there must always be a seal. Learn where the seal sits on every common fitting.

8 min read

Copper pipe and plastic pipe with brass fittings

Fittings

Copper vs plastic pipe: which is better?

Copper and plastic (PEX) pipe compared: cost, fitting, durability, where each is used, and what beginners should know.

8 min read

Inside a cistern showing water level and flush valve

Toilets

Weak toilet flush? How to fix it

Toilet not flushing properly? Check the water level, the button, the flush valve, limescale and blockages to get a strong flush again.

7 min read

Dual flush valve fitted inside a toilet cistern

Toilets

How to replace a toilet flush valve

Replace a dual-flush or push-button flush valve: when you can do it from the top, when the cistern must come off, and where the seals go.

9 min read

Bath waste and trap under a bath

Drains & wastes

How to unblock a bath or shower drain

Slow draining bath or shower? Remove hair from the waste, clean the trap, plunge properly and stop it blocking again.

8 min read

Cutaway of a trap showing the water seal

Drains & wastes

Smelly drain in the house? Causes and fixes

Sewer smell from a sink, shower or bath? Learn how traps stop smells, why they fail, and how to get rid of the smell for good.

7 min read

Different plastic sink traps laid out

Drains & wastes

Types of plumbing traps explained

P traps, S traps, bottle traps, running traps and anti-siphon traps — what they look like, where they are used and how they seal.

8 min read

Basin waste and trap with seals shown

Drains & wastes

How to fit a basin waste (slotted and unslotted)

Fit a click-clack or pop-up basin waste: slotted vs unslotted, where the seals go, and how to stop leaks around the plug hole.

8 min read

Kitchen sink with plumbing underneath

Drains & wastes

Kitchen sink waste and plumbing explained

How kitchen sink waste works: basket strainer, overflow, trap, washing machine and dishwasher connections, and fixing common leaks.

8 min read

Radiator being removed from the wall for flushing

Radiators

Radiator cold at the bottom? Here's why

Radiator hot at the top but cold at the bottom? Learn what sludge is, how to check, and the options from flushing to replacement.

8 min read

Lockshield and thermostatic radiator valves on a radiator

Radiators

How to balance radiators

Some radiators hot and others cold? Balancing with the lockshield valves gets heat evenly to every room. Step-by-step guide.

9 min read

Cutaway of a radiator valve showing the tail thread and olive

Radiators

How to replace a radiator valve

Change a radiator valve or upgrade to a TRV: draining options, valve tails, PTFE on threads, olives on the pipe, and testing.

10 min read

Thermostatic radiator valve with numbered head

Radiators

Thermostatic radiator valves (TRVs) explained

What the numbers on a TRV mean, how a thermostatic radiator valve works, and how to free a stuck TRV pin.

7 min read

Radiator valve with a cloth catching a drip

Radiators

Radiator leaking at the valve? How to fix it

Find where a radiator valve leaks — spindle, union nut, tail or pipe nut — and how to fix each one safely.

8 min read

Diagram of a home's water pipes leading to the stopcock

Leaks & emergencies

Can't find your stopcock? Where to look

Can't find the stopcock? A room-by-room checklist for houses and flats, how to follow the pipe and what to do in an emergency.

7 min read

Tap headgear with jumper and rubber washer

Taps

How to change a tap washer

Change the rubber washer in a traditional tap: sizes, removing the headgear, the jumper, and re-seating if it still drips.

7 min read

Toilet fill valve and float inside a cistern

Toilets

Toilet cistern not filling? How to fix it

Cistern not filling or filling very slowly? Check the isolation valve, the fill valve, its filter and the float. Easy fixes inside.

7 min read

Cutaway of close-coupled cistern bolt with washer inside the cistern

Toilets

Leaking close-coupled toilet: bolts and doughnut

Water dripping between the cistern and pan? Fix close-coupled toilet leaks: bolt washers inside the cistern and the doughnut seal.

8 min read

Cutaway of a pan connector seal between toilet and soil pipe

Toilets

Toilet leaking at the base? Causes and fixes

Water around the bottom of your toilet? Find whether it is the pan connector, the cistern, condensation or the supply, and how to fix it.

8 min read

Adult learners practising plumbing in a workshop

Careers

Can you become a plumber without an apprenticeship?

Too old, too busy or no apprenticeship available? How adults in the UK learn plumbing online, practise and start doing small jobs.

8 min read

Plumbing student learning on a phone between jobs

Careers

What to look for in an online plumbing course (UK)

Choosing an online plumbing course? The features that matter: real teachers, detailed theory, practical videos, quizzes, exams and a path to first jobs.

8 min read

Plumber writing a price on a quote

Careers

How much do plumbers earn in the UK?

What affects a plumber's income in the UK: employed vs self-employed, location, job types, and how beginners can grow earnings.

8 min read

Plumbing quote being written with a calculator

Careers

How to price your first plumbing job

Price plumbing jobs fairly: time, parts, travel, call-out, fixed prices vs hourly, and how to write a clear quote.

9 min read

Plumber shaking hands with a happy customer

Careers

How to get your first plumbing customer

Find your first paying plumbing customers: friends and family, local groups, Google Business Profile, reviews and simple marketing.

8 min read