A kitchen refit can involve much more plumbing work than simply reconnecting a sink. Changing the sink position, relocating appliances or installing a boiling-water tap can all affect the pipework behind the units.
If you’re looking for a kitchen plumber in London, the important question is not simply who can reconnect the appliances at the end. It is when the plumbing needs to be considered. If the layout or plumbing is changing, getting a plumber involved before the kitchen is fitted gives them the opportunity to assess the existing installation, identify potential constraints and plan the new connections while everything is accessible.
What Plumbing Does a Kitchen Refit Involve?
The amount of plumbing required depends on the new kitchen layout. If the sink and appliances are staying in their existing positions, the work may be limited to adapting or replacing connections. If their positions are changing, the water supplies and waste routes need to be considered as part of the new layout.
At Happy Dog Plumbing & Heating, we approach a kitchen installation as one connected plumbing arrangement rather than a series of separate connections. The final position of the sink and appliances needs to work with the existing services, not just the kitchen plan.
A kitchen layout should not be approved purely from the cabinet plan. The position of the sink and appliances also needs to work with the available water supplies, waste route and access to isolation points. A layout that looks straightforward on paper may require considerably more plumbing work once the existing services are exposed.
Moving the sink
Moving a sink involves more than extending the hot and cold-water supplies. The new position also needs a suitable waste route back to the drainage connection.
The route, connections and drainage fall need to be considered before the sink is relocated. A position that looks practical on a kitchen plan may not provide a straightforward waste route once the existing pipework is taken into account. This is why the proposed sink position should be checked against the existing drainage arrangement before cabinets are fitted, rather than treating the waste connection as something to resolve at the end.
Dishwashers and washing machines
Dishwashers and washing machines need appropriate water and waste connections, along with accessible isolation valves. Their positions should be confirmed before the kitchen units are fitted so connections can be installed without leaving awkward or inaccessible pipework behind the cabinetry.
Where several appliances are being installed or moved, their connections should be considered together rather than individually. This helps ensure all appliances have suitable connections and enough space for access once the units are installed. Happy Dog Plumbing & Heating domestic appliance installation services cover washing machines and dishwashers, including standalone and integrated appliances.
Boiling-water taps
Boiling-water taps such as Quooker and InSinkErator systems require both plumbing and electrical considerations. The plumber handles the water-side connections, while any fixed electrical connection required for the system should be completed by a suitably qualified electrician.
The position of the tap and its associated components should therefore be established before the cabinetry is installed. This is particularly important where space beneath the worktop is limited, as the plumbing connections, system components and electrical requirements all need to work within the finished kitchen design. Planning this in advance allows both trades to work around the final layout rather than adapting services afterwards.
When Should You Call a Professional?
You should involve a plumber before the kitchen is fitted if the refit involves moving the sink, changing water or waste pipe routes, relocating appliances or adding new plumbing connections.
The ideal point is usually after the final kitchen layout has been confirmed but before the cabinets conceal the services. At this stage, the plumber can assess the existing arrangement, identify what needs changing and coordinate first-fix plumbing with the kitchen installer and electrician. It also gives you an opportunity to identify constraints before they become installation problems. If the proposed sink or appliance position depends on an awkward waste route, an inaccessible isolation valve or an unsuitable existing connection, it is much easier to address this before the kitchen is assembled.
This can be particularly relevant in South London properties where the layout of the property has previously been changed, and the existing plumbing installation has been altered during previous work. Period homes, flats and previously renovated kitchens may have services arranged around an earlier layout, so what appears to be a simple relocation can require closer inspection before work begins to ensure that the existing pipework configuration is correct and complies with building regulations.
When Should the Plumbing Be Done?
Most plumbing planning and first-fix work should take place before the kitchen is fully fitted. A typical sequence is:
- Structural or building work
- Plumbing first fix
- Electrical first fix
- Plastering, flooring or tiling as required
- Kitchen units and worktops fitted
- Final plumbing and appliance connections
The exact sequence depends on the project, but the key principle is that plumbing and electrical first-fix work should be completed while the relevant areas remain accessible. Leaving changes until after the kitchen has been fitted can turn a relatively straightforward plumbing alteration into a more disruptive job.
What Should a Kitchen Plumbing Quote Include?
If the plumber is being asked to alter existing services rather than simply reconnect appliances, the quote should make that distinction clear.
Depending on the refit, it may cover:
- adapting or moving hot and cold-water supplies;
- relocating or modifying sink waste pipework;
- dishwasher and washing machine connections;
- isolation valves;
- new or altered drainage connections;
- water-side connections for a boiling-water tap; and
- final connections once the kitchen is fitted.
It should also be clear whether making good, replacing defective existing pipework or dealing with unexpected problems uncovered during the work is included or would be treated as additional work.
If existing kitchen plumbing shows signs of leaking, corrosion or deterioration once the units are removed, those issues should be addressed before the new kitchen conceals them again. Expert plumbing installation service covers new or altered domestic plumbing, while repairs and general maintenance can address problems with the existing system.
We have more than 50 years of combined experience working across South London. If you’re planning a kitchen refit, contact our team before the installation begins to discuss the plumbing involved, from moving pipework and sink connections to appliance and boiling-water tap installations. Getting the plumbing planned at the right stage can help prevent avoidable disruption once your new kitchen is in place.
