Between-Tenancies Plumbing and Heating Checklist for Landlords

A short void period is the best time to find leaks, confirm controls and complete disruptive repairs. A documented check also gives the new tenant clear information about stop taps, heating and emergency contacts.

Compare whole-life suitability rather than a headline feature or price. Capacity, compatibility, access, maintenance, safety and the condition of the existing services can all change the sensible choice.

Assess the whole installation

Good plumbing decisions begin with the system actually fitted, not a generic diagram. Note the age of the property, hot-water type, accessible isolation valves and whether the symptom affects one fitting or several before choosing a repair or product.

Check before the next move-in

Do not treat a quick visual check as a substitute for required inspections, servicing or risk assessments. Keep invoices, service records and photographs with the property file.

Write down the date, location, observation and action taken. A concise record helps the next inspection distinguish a new change from an established condition.

• Confirm the internal stop tap is labelled, accessible and operable without forcing it. Use the product instructions and the actual UK installation as the reference point; stop if the expected layout, part or control is not present.
• Inspect under sinks, behind toilets, around baths and beneath the boiler for leaks or staining. Dry the area first, then check it again under normal operating conditions. The timing and first point of fresh moisture are more useful than the final spread of the stain.
• Run taps, showers and toilets; check hot-water delivery, drainage speed and sealant condition. Stop repeated flushing if the water level rises. Separate an inlet or cistern fault from a blockage, and check nearby fixtures for signs that the branch drain is also affected.
• Test heating controls and note radiator cold spots, unusual noises and boiler fault codes. Limit checks to normal user controls and visible information. Gas, combustion and internal appliance work belongs to a suitably qualified Gas Safe registered engineer.
• Check appliance hoses and waste connections where appliances are supplied. Look along the full length and at both connections. Bulging, abrasion, rust staining or a hose stretched tight behind an appliance justifies replacement before it bursts.
• Flush little-used outlets and refill traps that may have dried out. A trap needs an intact water seal and a clear, correctly ventilated waste route. Refilling a dry trap may stop an occasional smell, but a recurring odour needs diagnosis.
• Record meter readings, completed repairs and the location of isolation points. Operate it gently and confirm that flow actually stops; a seized or passing valve should be repaired under controlled conditions, not forced during an emergency.

A practical comparison process

1. Define the symptom or desired outcome in practical terms rather than choosing a product first.
2. Identify the relevant water, waste, heating and electrical connections and how each can be isolated.
3. Check measurements, access and the condition of existing valves before dismantling anything.
4. Read the manufacturer's instructions and confirm replacement parts suit the UK installation.
5. Test one change at a time and inspect every disturbed joint before closing access.

Common mistakes to avoid

• Buying parts from appearance alone without checking size, connection and system compatibility.
• Forcing an old valve or fitting immediately before the water must be restored.
• Copying US terminology, measurements or code advice into a UK installation.
• Removing access or boxing in joints before testing and inspection are complete.

UK context and safety

HSE guidance says landlords must ensure relevant gas appliances and flues have an annual gas safety check, and the record must be current before a new tenancy starts. A boiler service and a landlord gas safety check are not automatically the same task. Gas work must be carried out by a suitably qualified Gas Safe registered engineer.

Do not work on gas appliances, fixed electrical circuits or safety controls unless you hold the appropriate competence. Before any DIY plumbing task, confirm isolation, protect against hot water and consider what will happen if an old valve does not close or a fitting breaks.

Prevention and ongoing care

Build maintenance and future repair access into the choice rather than treating them as afterthoughts.

• Address drips, slow drains, loose fittings and sealant failure before finishes are damaged.
• Retain manuals, model numbers and photographs of concealed pipe routes.
• Schedule seasonal checks around frost, heating demand and periods when the property is empty.
• Use qualified specialists for regulated or safety-critical work and keep their records.

Useful UK guidance

• HSE: landlords' gas-safety responsibilities

When to call PHD24

PHD24 can help landlords and letting agents group plumbing, heating and drainage repairs into one planned visit. Provide the inventory, previous fault history and access arrangements so urgent safety work can be separated from improvements that can be scheduled.

PHD24 can inspect the existing installation, explain the realistic options and separate urgent repair from optional improvement. Clear photographs, model details and a short fault history help the engineer arrive better prepared.

Call promptly if water cannot be isolated, wastewater is entering the property, heat or hot water has failed in vulnerable circumstances, or the fault involves gas, wet electrics or a risk to the building. For a non-urgent visit, photographs and a short history help PHD24 plan the right first attendance.