How to find your stop tap, isolate a supply and record what you see. A reading page of questions to ask a qualified professional before an emergency call-out.
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Plumbing and heating topics for North West London homes
Plumbing and heating reading guides for homes and small businesses across North West London: how to prepare for an emergency call-out, boiler and hot water questions to raise with a professional, bathroom and kitchen planning, and the maintenance that keeps the water where it should be.
The day board
- Written up
- guides
- 10
- drawers
- 4
- Logged in 14 days
- 10
- Sources read
- 7 on 5 domains
The reading
4 guides · Reading guides for boilers, bathrooms and leaks across North West London
Pressure loss, lockouts, radiators cold at the top and cylinders that will not heat: which symptoms to note and which questions to ask a Gas Safe registered engineer.
From a dripping tap to a full refit: how to plan sinks, showers, wastes and the falls that make a bathroom dry itself, and what to cover in a quote comparison.
Annual service questions, winter preparation, drain care and how to mark isolating points so the next leak is easier to handle.
Work out what to check before you call, list the questions worth asking a professional, and compare written quotes on the same points before any work starts.
- Each guide lists the sources it draws on
- Questions to ask a professional before work starts
- How to compare written quotes on the same points
- Gas work only through a Gas Safe registered engineer: how to check the number on the register
Where this guide applies
Reading guides for Harrow, Northwood, Stanmore, Pinner, Ruislip, Wembley and the wider HA postcodes of North West London.
Latest guides
8 guides · 21/09/2026 to 21/09/2026
Find your stop tap before you need it
For most households: find the valve that shuts the water, test it twice a year, label it, and know which parts of the problem are yours and which belong to the water company.
On this guide
- Where the stop tap is usually found
- Which tap is yours and which belongs to the water company
- How to test it without breaking it
- Why it helps to label the isolating points
- What this sheet does not cover
3 min read 781 words 4 sources
General maintenance for your water heater
For every house with hot water: which of the three UK systems you have, the checks each one wants, and the one system whose servicing is treated as specialist work.
Choosing the right plumber for your job
For anyone about to let a stranger loose on their water and gas: the registers to check, the paperwork to insist on, and the paying habits that keep a small job small.
Choosing the right bathroom sink
For anyone standing in a showroom holding a tape measure: the five shapes of basin, the tap-hole maths, the waste that must match the overflow, and what the wall has to say about it.
10 guides Every guide
The guide file
4 drawers · 10 guides
Emergency call-outs
Burst pipes, leaks that will not wait and boilers down on the coldest night: what we do first, and what you can do while we drive
2 guides
See also Drawer 02, Boilers & heating 1 domain read in both drawers ; Drawer 03, Bathrooms & kitchens 1 domain read in both drawers ; Drawer 04, Maintenance & prevention 2 domains read in both drawers
P1-001 Thaw frozen pipes without cracking the run
For the first hard frost of the season: a tap that runs dry, a pipe gone quiet in the loft, and the difference between thawing a pipe and bursting one.
Boilers & heating
Boiler faults, pressure, radiators and hot water: diagnosis, honest lifespans and the checks we write down
3 guides
See also Drawer 01, Emergency call-outs 1 domain read in both drawers ; Drawer 03, Bathrooms & kitchens 2 domains read in both drawers ; Drawer 04, Maintenance & prevention 3 domains read in both drawers
Bathrooms & kitchens
Taps, sinks, showers and full refits: choosing brass that lasts and getting the falls right
2 guides
See also Drawer 01, Emergency call-outs 1 domain read in both drawers ; Drawer 02, Boilers & heating 2 domains read in both drawers ; Drawer 04, Maintenance & prevention 3 domains read in both drawers
Maintenance & prevention
The checks that stop the 2 a.m. call: isolating valves, winter drains and the annual service
3 guides
See also Drawer 01, Emergency call-outs 2 domains read in both drawers ; Drawer 02, Boilers & heating 3 domains read in both drawers ; Drawer 03, Bathrooms & kitchens 3 domains read in both drawers
P4-001 Tips for cleaning your drains
For the slow-draining basin, the shower that pools, and the kitchen sink that gave up: gentle first, chemical last, and the habits that keep the pipe clear between.
Sources consulted
7 sources · 5 domains
Each address was read for at least one guide; the ref says which.
watersafe.org.uk
- / read for P1-002, P2-002, P3-002, P2-001, P4-003, P4-002, P3-001, P1-001, P4-001
- /advice/general_plumbing_advice/turning_off_your_water/what_should_i_do_if_my_internal_stop_tap_is_leaking_or_broken/ read for P1-002, P2-003, P2-002, P3-002, P2-001, P4-003, P3-001, P1-001
- /advice/common_plumbing_questions1/leaks/what_should_i_do_if_i_find_a_leak_in_or_around_my_home_or_business/ read for P1-002, P2-003, P2-002, P3-002, P2-001, P4-003, P3-001, P1-001
thameswater.co.uk
- / read for P1-002, P1-001, P4-001
gassaferegister.co.uk
- / read for P2-003, P2-001, P4-003, P4-002
hse.gov.uk
- /gas/domestic/index.htm read for P2-003, P2-002, P2-001, P4-003, P4-002, P3-001
citizensadvice.org.uk
- /consumer/ read for P3-002, P4-002