Modern dishwashers offer convenience, hygiene, and time-saving benefits to households across London. However, improper installation or plumbing shortcuts can lead to damaging leaks, inefficient drainage, or even non-compliance with UK safety regulations. At Citywide Plumbers, our professional team is here to ensure your dishwasher is plumbed in correctly from day one—clean, secure, and built to last.
Whether you're replacing an old appliance or installing one for the first time, the following plumbing tips and procedures will help ensure everything goes smoothly.
1. Check the Plumbing Infrastructure First
Before anything else, ensure that your kitchen’s plumbing can support a dishwasher. This includes access to a cold water feed, a waste outlet connection, and nearby isolation valves. If your kitchen wasn’t originally fitted with a dishwasher, don’t worry—Citywide Plumbers can retrofit the necessary pipework quickly and cleanly.
2. Use an Isolation Valve
Always ensure a dishwasher has its own isolation valve installed. This valve allows the water supply to be shut off quickly in an emergency or during maintenance. Our engineers always fit an accessible isolation valve as standard—it’s a simple but vital safety measure.
3. Ensure Proper Waste Water Discharge
The dishwasher’s drain hose must connect to the kitchen’s waste system, usually via a spigot on the sink trap. It’s crucial that this hose is looped upwards before connecting to prevent waste water from flowing back into the appliance. Citywide Plumbers ensures all waste hoses are correctly routed and clamped in place.
4. Watch the Water Pressure
Too much or too little water pressure can impact your dishwasher’s performance. While most domestic water systems in London are within acceptable range, our engineers check the pressure to ensure optimal operation. We may recommend a pressure-reducing valve or booster pump if needed.
5. Avoid Kinked Hoses
Improper installation often results in crimped or kinked hoses, which restrict water flow and cause drainage issues. When you hire Citywide Plumbers, we route all hoses carefully through cabinetry or service spaces and secure them to avoid twisting or wear.
6. Always Use WRAS-Approved Components
To comply with the UK’s Water Supply Regulations, only WRAS-approved fittings and connectors should be used. We never cut corners. Every part we install—from flexible hoses to isolation valves—is tested and certified for use with UK water systems.
7. Level the Appliance
An often-overlooked but critical step is ensuring your dishwasher is level. An uneven appliance may not drain properly, causing standing water and internal damage. Our team uses levelling tools and checks alignment during every install.
8. Test Everything Thoroughly
Once installed, Citywide Plumbers conducts full leak and drainage tests. We check under-sink fittings, run a short wash cycle, and inspect connections. Our work is only complete when your dishwasher runs quietly and efficiently—without a drop out of place.
9. Educate the Homeowner
We believe in empowering our customers. After installation, we walk you through how to operate the appliance safely, shut off the water in an emergency, and what to look for if any issue arises later on. Support doesn’t stop at installation—it continues with advice.
10. Get It Done Professionally
DIY might seem tempting, but a poorly installed dishwasher can cause water damage or violate local plumbing codes. With Citywide Plumbers, you're guaranteed professional workmanship, transparent pricing, and full compliance with all relevant UK standards.
Need expert dishwasher plumbing in London? Trust the qualified engineers at Citywide Plumbers for a seamless, mess-free installation.
Call us on 02038928545 or 📧 email info@citywideplumbers.co.uk to book your visit today.