A plumber is a tradesman who specialises in building and maintaining systems used for plumbing, heating, drainage, clean water or industrial process plant.

A
Aberdeenshire
Anglesey / Sir Fon
Angus / Forfarshire
Antrim
Argyllshire
Armagh
Ayrshire

B
Banffshire
Bedfordshire
Berkshire
Berwickshire
Brecknockshire / Sir Frycheiniog
Buckinghamshire
Buteshire

C
Caernarfonshire / Sir Gaernarfon
Caithness
Cambridgeshire
Cardiganshire / Ceredigion
Carmarthenshire / Sir Gaerfyrddin
Cheshire
Clackmannanshire
Cornwall
Cromartyshire
Cumberland

D
Denbighshire / Sir Ddinbych
Derbyshire
Devon
Dorset
Down
Dumfriesshire
Dunbartonshire / Dumbartonshire
Durham

E
East Lothian / Haddingtonshire
Essex

F
Fermanagh
Fife
Flintshire / Sir Fflint

G
Glamorgan / Morgannwg
Gloucestershire

H
Hampshire
Herefordshire
Hertfordshire
Huntingdonshire

I
Inverness-shire

K
Kent
Kincardineshire
Kinross-shire
Kirkcudbrightshire

L
Lanarkshire
Lancashire
Leicestershire
Lincolnshire
London (Greater London)
Londonderry

M
Merioneth / Meirionnydd
Middlesex
Midlothian / Edinburghshire
Monmouthshire / Sir Fynwy
Montgomeryshire / Sir Drefaldwyn
Morayshire

N
Nairnshire
Norfolk
Northamptonshire
Northumberland
Nottinghamshire

O
Orkney
Oxfordshire

P
Peeblesshire
Pembrokeshire / Sir Benfro
Perthshire

R
Radnorshire / Sir Faesyfed
Renfrewshire
Ross-shire
Roxburghshire
Rutland

S
Selkirkshire
Shetland
Shropshire
Somerset
Staffordshire
Stirlingshire
Suffolk
Surrey
Sussex
Sutherland

T
Tyrone

W
Warwickshire
West Lothian / Linlithgowshire
Westmorland
Wigtownshire
Wiltshire
Worcestershire

Y
Yorkshire - East Riding
Yorkshire - North Riding
Yorkshire - West Riding
Yorkshire - York

North America
 Canada
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Caribbean
Central America

Oceania
Australia
New Zealand

World
Africa
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Europe
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Other