When fitting a new kitchen, the main plumbing points to think about are where the sink will go, how its waste will reach the drain, where the dishwasher and washing machine will connect, and how the hot and cold supplies will be routed. It also helps to plan isolation valves and access so future repairs are easier.
Getting the plumbing plan right before units are ordered can save time and changes later on.
Sink Position and Waste Route
The sink waste needs a steady downward slope to the outside wall or drain. Keeping the sink close to its current position is often simpler. Moving it to an island or the other side of the room may mean a longer waste run, which needs careful planning to avoid slow drainage.
Long waste pipes behind units should be well supported so they do not sag. Too many bends can make blockages more likely.
The type of sink matters too. A double bowl or a sink with a waste disposal unit needs a different trap and waste kit, so choose the sink before the waste is planned.
Appliance Connections
Dishwashers and washing machines need a cold water supply, usually through a small valve, and a way to drain. The waste can connect to a spigot on the sink trap or to a standpipe with its own trap.
Placing these appliances next to the sink keeps connections short and simple. If they are further away, the plumbing has to run behind other units, so plan for access points.
Some fridges with water dispensers need a cold supply too. Check the maker’s instructions for any filters or valves required.
Supplies, Valves and Access
New units are a good time to fit isolation valves on the hot and cold feeds to the sink tap, and on each appliance supply. These let you turn off one item without shutting off the whole home.
Think about where your stopcock is. If it sits under the sink, keep it reachable rather than hidden behind a fixed panel or drawer.
Check the condition of old pipework while the units are out. Corroded or worn pipes and valves are much easier to replace before new cabinets go in.
Working With Other Trades
A kitchen project often involves a fitter, an electrician and other specialists. Electrical work for appliances and any cooking appliance connections must be done by appropriately qualified trades.
Agree with everyone when the plumbing will be roughed in, tested and finished, so pipes are checked for leaks before units and worktops close them in.
Take photos of the existing pipes and valves before the old units come out. They can help everyone involved plan where the new connections will go.
If you are planning a new kitchen and want the plumbing side thought through, get in touch about our kitchen plumbing service in Oxford. We can look at your current pipework and talk through what your new layout will need.