Wellfield MechanicalBackflow Prevention and Check Valves
Essential for outside taps, commercial kitchen feeds, and unvented hot water systems. We fit double check valves and non-return fittings that prevent contaminated fluid from drawing back into the wholesome water network. Fully compliant with local water authority bylaws.
What is included
- ✓WRAS-approved double check valves
- ✓Internal test points
- ✓Directional flow confirmation
- ✓Inline serviceable bodies
- ✓Frost-resistant positioning
- ✓Bylaw compliance check
Request a site visit or quote
We will review your details and confirm available appointment times shortly.
Twelve-month workmanship standard
Every valve, fitting, and pipe joint we install is covered by our twelve-month workmanship guarantee. If a fitted joint we installed leaks or weeps within that period, we return and rectify it at no charge. Pricing & payment
How we work
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1
Risk Categorisation
We confirm the fluid risk level, fitting Fluid Category 3 or higher protection.
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2
In-line Cut
The line supplying the vulnerable outlet is cleanly isolated and separated.
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3
Valve Insertion
The non-return valve assembly is fitted facing the correct flow direction.
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4
Backflow Test
Downstream pressure is released to ensure internal springs seal against back-siphonage.
Questions about this service
Is an outside tap required to have a check valve?
Yes, water bylaws require at least a double check valve on any garden hose point.
Can the valve freeze during winter?
We install the check valve indoors on the warm side of the wall before the pipe exits outside.
Does this reduce the water flow to my hose?
Our full-bore check valves minimise restriction, maintaining solid hosepipe pressure.
Why choose Wellfield Mechanical
Compliance valves to protect the drinking water supply.
Regulatory Compliance
Meets mandatory water undertaker requirements for external and commercial feeds.
Drinking Water Safety
Stops chemical, hose, or stagnant tank water contaminating drinking taps.
Simple Servicing
Cartridge-based check valves allow inspection without rebuilding the whole line.
All services
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Reliable shut-off valves fitted to your pipework.
from £85 per valve
Pressure Reducing Valve Fitting
Controlled water pressure throughout your interior network.
from £160 per installation
Tap Cartridge and Spindle Repair
Precise mechanical repair for dripping taps and mixers.
from £75 per tap
What our clients say
Prompt arrival and dry pipes.
Rhys T., Cardiff, GBNeat copper soldering under the sink.
Carys M., Cardiff, GBThe technician diagnosed our noisy thermostatic cartridge and replaced it without fuss.
Alun P., Cardiff, GBNeed a valve replaced or pipe altered?
Send a short message with your location and the issue. We will call you back within two hours with clear options.