Introduction: Why WRAS Approval Is Non-Negotiable in Food and Beverage Water Systems
The food and beverage industry has some of the most stringent water quality requirements of any sector, combining the general regulatory requirements of the Water Supply (Water Fittings) Regulations 1999 with food hygiene legislation, local authority environmental health inspection, and customer quality assurance standards. In this environment, WRAS approved valves are not simply a regulatory compliance requirement — they are a fundamental element of food safety and brand protection.
Water used in food and beverage production is a critical ingredient and process medium. Whether it is brewing water, ingredient water in ready-meal production, cooling water, CIP (clean-in-place) wash water, or the potable water supply to staff facilities, any contamination of the water supply has direct food safety implications. WRAS approved valves ensure that the valves, fittings, and components in contact with the water supply do not leach harmful materials into the water, preventing a potential route of contamination into the food product.
This guide examines the key applications for WRAS approved valves in the food and beverage industry, the specific material and design requirements for this sector, the backflow prevention requirements for process water connections, and the valve types most commonly specified in food and beverage facilities.
Regulatory Requirements for Water Systems in Food and Beverage Facilities
Food and beverage manufacturing facilities in the UK are subject to a layered regulatory framework governing water quality and water system design. The primary legislation is the Water Supply (Water Fittings) Regulations 1999, which requires that all water fittings in contact with mains drinking water supply must be of an appropriate quality and standard, with WRAS approved products providing the recognised route to compliance.
In addition to the Water Fittings Regulations, food and beverage facilities must comply with Regulation (EC) 852/2004 on the hygiene of foodstuffs (implemented in UK law post-Brexit), which requires that adequate supplies of potable water are available and that the water systems used in food handling areas do not present a risk of contamination. The UK Food Standards Agency and local environmental health officers inspect food premises against these hygiene standards.
Many food and beverage companies also operate under industry quality management systems such as BRC (British Retail Consortium) Global Standards for Food Safety, the Safe and Local Supplier Approval (SALSA) scheme, or retailer-specific quality standards. These standards typically include requirements for water system management, documentation of WRAS approval status, and regular water quality testing. WRAS approved valves and documented WRAS compliance form an important part of the evidence base for audits against these standards.
Potable Water Supply in Food and Beverage Manufacturing
The potable water supply to a food and beverage manufacturing facility serves multiple purposes: ingredient water (directly incorporated into products), process water (used in manufacturing operations but not directly in products), cleaning and CIP water, steam generation (for cooking, sterilisation, and heating), and general utilities (toilets, showers, canteen facilities).
In all cases where water is supplied from or connected to the public mains, WRAS approved valves and fittings are required throughout the supply and distribution system. In food and beverage applications, the material requirements for WRAS approved valves are often more stringent than in standard commercial applications, as the valves may be in contact with food-grade water at elevated temperatures or with cleaning agents during CIP cycles.
WRAS approved isolation valves on the incoming mains supply, WRAS approved pressure reducing valves where required for pressure management, WRAS approved strainers to protect sensitive equipment, and WRAS approved check valves for backflow prevention are all standard requirements in food and beverage facility water supply systems. These components must be WRAS approved and must be manufactured from food-compatible materials.
Material Requirements for WRAS Approved Valves in Food and Beverage Applications
In the food and beverage industry, WRAS approved valves must meet both the WRAS material standards for potable water contact (BS 6920) and the food industry's requirements for hygiene design and material suitability. The key material considerations are body material, seal material, and surface finish.
Stainless steel Grade 316 is the preferred body material for WRAS approved valves in food and beverage applications. Stainless steel 316 offers excellent corrosion resistance in both potable water and the cleaning chemicals used in CIP systems (typically caustic soda, peracetic acid, and chlorine-based sanitisers). It is also a recognised food-grade material under FDA and European food contact material standards. WRAS approved stainless steel ball valves, butterfly valves, and check valves are widely used throughout food and beverage water systems.
DZR brass WRAS approved valves are suitable for general utility water supplies in food and beverage facilities (toilets, showers, canteen water supplies), where they will not be in direct contact with the food product or with CIP cleaning chemicals. However, for process water valves, ingredient water valves, and any valves that may be cleaned by CIP, stainless steel WRAS approved valves are strongly preferred.
EPDM seals are the standard choice for WRAS approved valves in food and beverage applications, as EPDM is resistant to the hot water, steam, and chlorine-based sanitisers typically used in food industry CIP systems. PTFE and silicone seals are also used in specific applications. NBR seals should be avoided in food industry water systems, as NBR can be attacked by the cleaning chemicals used in CIP and by some food-grade oils and fats that may be present in process water.
For WRAS approved valves used in food-contact water applications, the internal surfaces should be as smooth as possible to minimise the risk of microbial colonisation in surface irregularities. WRAS approved full-bore ball valves with smooth PTFE seats and polished stainless steel balls are particularly suitable because they present a minimal internal surface area and are easy to clean.
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Backflow Prevention in Food and Beverage Water Systems
Backflow prevention is one of the most critical aspects of water system design in food and beverage facilities. The connection between the mains water supply and process water systems in food production represents a complex web of potential cross-connections, each of which must be assessed for fluid category and protected with the appropriate WRAS approved backflow prevention device.
Process water connections in food production are typically classified as Fluid Category 4 or Fluid Category 5 under the Water Supply (Water Fittings) Regulations 1999. Ingredient water connections to mixing vessels, holding tanks, and process equipment are Fluid Category 5 because the water will come into contact with food materials. CIP supply connections are Fluid Category 4 or 5 depending on the cleaning chemicals used. Steam supply connections for cooking and sterilisation are typically Fluid Category 3 or 4.
For Fluid Category 4 connections, WRAS approved RPZ (reduced pressure zone) valves are the required mechanical backflow prevention device. For Fluid Category 5 connections, a type AA or AB air gap is preferred, but where a direct connection is required for operational reasons and the water company approves the use of a mechanical device, a WRAS approved RPZ valve may be specified.
In practice, the most effective approach in food and beverage facilities is to incorporate air gaps wherever possible — filling tanks from an overhead outlet that discharges above the overflow level is the simplest form of air gap protection for ingredient water and process water. WRAS approved backflow prevention devices such as double check valves and RPZ valves are specified where direct connections are required and an air gap is not practicable.
Steam and Hot Water Systems: WRAS Approved Valves in Food Processing
Steam is widely used in food production for cooking, sterilisation, pasteurisation, and heating. The boiler and steam distribution system in a food production facility includes WRAS approved isolation valves on the boiler feed water supply, WRAS approved check valves on the feed water connections, and WRAS approved pressure reducing valves to reduce the steam distribution pressure to safe working levels in process areas.
Boiler feed water connections must incorporate WRAS approved backflow prevention as required by the fluid category of the boiler system water. Most commercial boiler systems use water treatment chemicals (Fluid Category 4) and require WRAS approved RPZ valves or appropriately designed air gaps on the feed water connection.
In food areas where steam or hot water is used for blanching, pasteurisation, or cleaning, WRAS approved valves on the hot water and steam distribution pipework must be suitable for the operating temperatures involved. WRAS approved ball valves rated for steam service (typically up to 180°C) or WRAS approved globe valves for throttling control are used in these applications, with EPDM or PTFE seats appropriate for the elevated temperatures.
CIP Systems and WRAS Approved Valves
Clean-in-place (CIP) systems are used throughout the food and beverage industry to clean and sanitise production equipment, pipework, and process vessels without disassembly. CIP systems circulate hot water, caustic detergent, acid rinse, and sanitiser through the production system in sequence, removing product residues and microbial biofilm.
WRAS approved valves in the CIP supply lines must be resistant to the cleaning chemicals used and must meet WRAS approval requirements where the CIP supply originates from or connects to the mains water supply. WRAS approved stainless steel ball valves or butterfly valves with EPDM or PTFE seats are the standard choice for CIP supply isolation. WRAS approved check valves prevent cleaning chemicals from flowing back into the potable water supply when the CIP system is operating.
For automated CIP systems controlled by a PLC or BMS, WRAS approved actuated valves — motorised ball valves or pneumatically actuated butterfly valves — provide remote, automated control of CIP flow circuits. The actuators on these WRAS approved valves must be compatible with the control system and rated for the duty cycle of the CIP programme, which may involve multiple cycles per day in high-throughput production facilities.
Beverage Industry Applications: Brewery, Dairy, and Soft Drinks
The specific requirements for WRAS approved valves vary across different segments of the food and beverage industry. In brewing applications, WRAS approved valves must be suitable for malt-containing wort, yeast-containing beer, and the caustic and acid CIP chemicals used to clean brewing vessels and pipework. Stainless steel WRAS approved butterfly valves and ball valves are widely used in brewery water supply systems, with EPDM seats for most applications and PTFE seats where acid CIP is used.
In dairy processing, WRAS approved valves must be suitable for milk, whey, and cream as well as the hot CIP chemicals. WRAS approved stainless steel butterfly valves with EPDM seats are the most widely used valve type in dairy water supply systems. In milk processing areas, the internal surface finish of WRAS approved valves is particularly important, as milk residues can support bacterial growth if surface irregularities are present.
In soft drinks production, WRAS approved valves must be compatible with carbonated beverages (which are acidic), fruit juices, syrups, and flavourings. WRAS approved stainless steel ball valves and WRAS approved double-seat mix-proof valves are used in soft drinks production for both ingredient water supply and product handling.
Water Efficiency and Metering in Food and Beverage Facilities
Water is a significant cost and sustainability concern in the food and beverage industry. Large food production facilities can consume millions of litres of water per year, and water efficiency is increasingly a focus of both cost reduction programmes and corporate social responsibility commitments. WRAS approved valves contribute to water efficiency through reliable flow control, minimal leakage, and accurate metering.
WRAS approved water meters with WRAS approved isolation valves are installed on production area water supplies to allow accurate monitoring of water consumption by process area. WRAS approved automatic water control valves — time-controlled solenoid valves, flow-controlled motorised valves, or demand-controlled solenoid valves linked to production scheduling — help to prevent water waste during non-production periods.
Documentation and Auditing of WRAS Approved Valve Compliance in Food Facilities
For food and beverage facilities subject to BRC, SALSA, retailer audits, or environmental health inspections, documenting WRAS approval compliance for water system components is an important part of the food safety management system. A documented schedule of all WRAS approved valves installed in the facility, including the WRAS approval reference number, installation location, and last maintenance date, provides clear evidence of compliance for auditors.
When purchasing WRAS approved valves for food and beverage applications, retain copies of the WRAS approval certificates and any associated material test certificates. These documents form part of the evidence that the water system components meet the regulatory and customer quality standard requirements.
Conclusion: WRAS Approved Valves as a Foundation of Food Safety
WRAS approved valves are a cornerstone of water system compliance in the food and beverage industry, providing the independent assurance that valve materials do not contaminate the potable water supply used in food production. By specifying WRAS approved stainless steel valves with food-compatible seal materials, incorporating appropriate WRAS approved backflow prevention at all process water connections, and maintaining comprehensive WRAS compliance documentation, food and beverage manufacturers can demonstrate the highest standards of water system safety to regulators, customers, and auditors.
At Wras Valves, we supply WRAS approved ball valves, butterfly valves, check valves, pressure reducing valves, RPZ backflow prevention valves, solenoid valves, and strainers in stainless steel and other food-compatible materials for the food and beverage industry. Contact our technical team to discuss your specific application requirements or browse our full range of WRAS approved products online.