A practical plumbing refurbishment checklist

1. Describe how the property will be used

List the rooms being changed and the outlets that may be used together. A second bathroom, a larger bath or a kitchen moved to another floor can change the demands on the existing supply and hot water arrangement. Draw the proposed layout even if it is only an early sketch, and mark the items that are fixed decisions versus ideas.

Explain whether the property will be occupied during the work and what must remain usable. A family living through a refurbishment may need a working bathroom throughout. A vacant flat can allow a different sequence. These choices influence isolation, temporary arrangements and the practical order of work, not simply the final appearance.

• Rooms and fixtures being added, moved or retained.
• Expected simultaneous use of showers and other outlets.
• Any current pressure, temperature or drainage problems.
• Essential facilities that must stay available during the project.

2. Establish what the existing supply can do

Do not select the whole design from catalogue descriptions alone. The survey should consider the incoming supply, usable flow and pressure, pipe distribution and hot water system. If the house already has poor performance when two taps run together, document it. New fittings may expose the same restriction rather than cure it.

A survey also needs to distinguish internal pipework from restrictions elsewhere. A shared main, communal system or incoming supply issue can affect the options. Ask which performance assumptions have been checked and which remain provisional. A larger cylinder, pump or pipe is not automatically the right answer to every complaint about a weak shower.

3. Plan pipe routes and service access

Pipe wiring is sometimes used by owners to describe a new plumbing layout. The professional scope is pipework installation, routing and connection; any electrical wiring should appear as a separate coordinated item. Define routes for water, heating and waste systems rather than leaving all of them to be solved after the kitchen or bathroom is fitted.

Discuss how valves, traps, pumps and other serviceable components will be reached later. An access panel may be less visually appealing than an uninterrupted wall, but a fitting that cannot be maintained creates a future opening-up job. Mark retained floors, decorative ceilings and fitted units that constrain the route. Confirm who will open and reinstate each area.

4. Check permissions and responsibilities early

For flats, tell the managing agent or freeholder about proposed changes in good time and establish what consent and documentation they need. Access to risers, communal valves or neighbouring premises may affect the programme. The plumber should not arrive expecting to isolate a shared supply that nobody has permission to touch.

Some plumbing changes require notification to the water supplier; Water Regs UK explains the process in the source below. Check the proposed work before installation. Building control and requirements relating to structural, electrical, gas or hot water work are separate considerations. Ask the project lead to identify which approvals apply and who is responsible for obtaining them.

5. Compare quotes using a shared scope

A short quotation can look cheaper because essential work sits outside it. Give each contractor the same layout and requirements, then compare what is included. Separate installation from access work, waste removal, reinstatement and finishing. Where an item is provisional, ask what evidence will fix the specification or price.

Product supply should also be explicit. If you supply fittings, confirm model details, compatibility, delivery dates and who deals with a missing or damaged item. If the installer supplies them, request enough specification to understand what is being proposed. Make substitutions a documented decision rather than discovering a different product after installation.

• Defined pipework, fittings and equipment scope.
• Access, isolation and temporary arrangements.
• Testing, commissioning and handover information.
• Making good, decoration and waste removal responsibilities.
• Provisional items and how changes will be authorised.

6. Coordinate first fix and second fix

First fix establishes the routes and connections that later finishes will conceal. Second fix connects and completes the visible fittings after the relevant surfaces and units are ready. The exact sequence depends on the project, but both stages need coordination with the builder, electrician and kitchen or bathroom installer.

Agree checks before pipework is covered and identify who gives permission to close the surfaces. Photograph confirmed concealed routes for the property records. If an unexpected pipe or damaged section is exposed, pause the affected work long enough to agree the solution and its consequences. Continuing with an unapproved assumption can move the problem into a finished room.

7. Define what a finished job means

Completion should be more specific than water coming out of a tap. Discuss testing and commissioning appropriate to the installation, operation of the controls, access to isolation points and any required documentation. Record remaining work and which trade is responsible, especially where decoration or replacement floor coverings follow the plumbing.

Keep product information, model details and useful route photographs together. Ask for an explanation of ordinary user controls and what to do if a fault develops. Do not open boiler covers, electrical enclosures or unvented cylinder safety devices to familiarise yourself with the system; those are areas for appropriately competent professionals.

Prepare a useful refurbishment enquiry

Begin with the postcode, property type and a short description of the changes. Say whether drawings exist, whether the property is occupied and when you hope to carry out the work. Mention known problems and any freeholder or building-management restrictions. The team can arrange a suitable way to share plans and photographs after the initial enquiry.

Loyal Plumbers carries out pipework and plumbing projects across London and inside the M25, supported by 10 active vans and a 24/7 service. Planned projects need a survey and an agreed programme. Bring us in while routes and equipment are still being decided, so the installation can support the design you intend to build.