Arrow Valves donates BTMIDI-3A

We have donated one of our Fluid Category 5 units as part of the BBC special that will air later this year.

Arrow Valves Limited are delighted to support the BBC’s DIY SOS Special for the Grenfell community, as we have donated one of our BTMIDI-3A units.

The unit has been donated to as part of the mechanical equipment for the Dale Youth Boxing Club and North Kensington community centre.

The BBC project involves rebuilding a gym and a new community centre at the Grenfell site, for the local community to use.

If you are interested in viewing the BBC’s “DIY: SOS: Grenfell special”, the two episodes will air later in 2018.



Arrow Valves meets TimeBank!

“Be there, Be a volunteer”

At Arrow Valves, we are always looking for new ways to help charitable organisations and the community, and to give something back. In place of a financial donation, we wanted to give something extra – our time. TimeBank are national volunteering charity, and their goal is to transform the volunteering experience and make it a real force for change. They work with businesses to engage staff members in volunteering, connecting companies to local projects – helping communities.

On the 9th and 10th of April, several members of the Arrow Valves team headed over to Woodberry Down in North London, to help regenerate a community Garden.

This is what we were faced with…

As Adrian, one of the volunteers said, ‘it was a wet and miserable day and we had to take orders from strangers. The whole process looked daunting and impossible to achieve, but a group of strangers knuckled down, got covered in mud and grafted’. And we grafted! The days were spent weeding, shoveling soil, building wooden planters by sawing, hammering and nailing, lifting and shifting these around… and the finished product was incredible!

For more information on TimeBank, or to find out how you can get involved, please visit their website here.

Keep reading to find out what our team had to say:

Adrian – “By the end of the day we looked back on what was rows of bags to nice neat rows of purpose built boxes, ready to plant. Tired, dirty, wet but with an enormous sense of achievement and a proud respect for our fellow workmates.”

Laura – “The day provided the opportunity to push the boundaries of our comfort zones and learn new skills in an inspiring and rewarding environment.  Volunteering our time versus money whilst meeting genuine hard-working people, both as volunteers and members of the community, humanised giving back.”

Shadene – “It felt great to help out a community who really wanted something beautiful for their neighbourhood. I loved seeing members from the local housing coming down to help and show appreciation for individuals putting in the time and extreme effort without complaint. The experience was made even more enjoyable by my team members – we all had an amazing day! All in all a green thumbs up.”

Sophie – “A rewarding day for myself, my team and the local community we helped. All in all, a day well spent.”

Veronica – “It was a fabulous, hard but rewarding day, not only did I help out with a great scheme I found I also helped myself, fresh air and laughter after a cold winter was just the tonic!”

Whole Site (Zone) and Point of Use Protection

This blog is to help Consultants, Contractors and Installers understand how whole site (zone) protection and point of use protection are used within a building and why they are deemed necessary.

This blog is to help Consultants, Contractors and Installers understand how whole site (zone) protection and point of use protection are used within a building and why they are deemed necessary.


The provision of zone or whole-site backflow protection should be in addition to individual requirements at points of use and within the system”.

Clause G15.25 is the guidance note in the water regulations that mentions these two key statements:

1 Whole site or Zone.

2 Point of Use.


Water Undertaker: The water board, the company responsible for supplying mains water to the boundary of a building or premises.

Fluid Categories: The classification of water and its potential health hazards, there are 5 recognized categories ranging from 1 to 5. With 1 being safe and 5 having the potential to cause serious health problems or possible death.

Potable Water: Water that is classed a wholesome water, or fluid category 1, water that is safe to drink and contains no harmful substances that will cause ill health. Water that the water board will supply to the boundary of the building as above.

Throughout the water regulations the text will refer to “fittings”:

A fitting is simply a device that is used to convey water from the water undertakers supply pipe at the boundary, this will be our pipe, but it also refers to any device used in the building, a tap, a washing machine, a sluice a pump set an outside tap and so on.

Cross Contamination: The risk that fluid from one fitting can mix with the fluid from another fitting.

 Upstream: Flow before a fitting

Downstream: Flow after a fitting

Backflow: Flow upstream that is in a direction contrary to the intended normal direction of flow, within or from a water fitting.

Risk Assessment: Based on the fluid categories above, a fitting will be assessed accordingly, and the correct backflow prevention device will need to be installed.

 The water as delivered to the boundary of our building is completely safe to drink. Under the water regulations, we must not waste, misuse, contaminate, unduly consume or erroneously measure the supplied water. For this blog we are mainly concerned with the contamination element.

Whole Site Protection (Zone)

Going back to clause G15.25 lets look at Zone protection and Whole site protection first. Whole site protection refers to the boundary of our building or the point at which the water undertakers pipe stops, under the water regulations it’s our duty to provide a single check valve or a double check valve at this point. However, this could vary with the severity or risk assessment of the building, generally in a multi-use building the single and double check valve will suffice, remember this is in addition to point of use protection that we will discuss further on. If the building was classed at a higher risk in general, then we may have to consider a RPZ valve (Fluid category 4) device for our whole site protection, still in addition to point of use protection.

Point of Use

For point of use protection, we must consider every fitting individually. We could adopt a very casual attitude in that the water undertakers supply is protected via our whole site device, this could be true. We could fit a fluid category 5 device and be completely safe, but we would not be protecting people within the building from cross contamination.

Every fitting then is risk assessed according to the severity of the water used in the final process, we should consider that a lot of fittings have inbuilt backflow prevention devices and would not need additional equipment. For example, a tap on a basin has an AUK2 airgap by default. A toilet cistern is interposed and is fluid category 5 by default. A washing machine may have a fluid category 3 device built in and so on. However, a bath in a domestic situation is fluid category 3, if the same bath is used in health care or assisted bathing then the risk becomes fluid category 5. The air gap on domestic tap would not suffice in a medical application, the same would apply to our washing machine if it were used in a medical application.

Based on our risk assessment, the correct backflow prevention device is fitted upstream of our fitting, no additional water take-off points must now be fitted downstream of this device.

There may be allowances within our building to further Zone protect rather than Point of use protect. For example, if we have a domestic washing machine and a dish washer in a fluid category 4 situation they must be protected via point of use devices (Figure1).

Figure 1

If we have 2 washing machines that are doing the same job within the building, the water board may allow 1 device to serve both units (Figure 2).

Figure 2


Point of use backflow protection is required, in addition to Whole site or Zone protection, each fitting must be risk assessed accordingly and the correct backflow prevention device fitted.

The water board must be notified of the intended works, this is the duty of the building owner or their appointed representative.

The Water regulations guide is an informative guide with many examples relating to fluid categories and the correct devices required.

Arrow Valves have an extensive knowledge of the water regulations, and an extensive range of products that comply with the regulations and satisfy both Whole Site (Zone) and Point of use protection.


More than just a ‘Standpipe…’

No power for your Fluid Category 5 application?
No problem for our Fluid Category 5 Standpipe!

…introducing our brand new Filling Standpipe – our Standpipe Assembly with an integral break tank with an AB Air Gap, making it suitable for Fluid Category 5 backflow protection.

This standpipe is designed for filling Fluid Category 5 applications, providing water under gravity, where there is no option for a power supply for an electrical pump.

Primarily designed for boat filling, but perfect for other category 5 applications where a DC pipe interrupter just won’t suffice, you will only need your cold water inlet pipe to run this standpipe.

Unlike traditional Standpipe Assemblies that usually come complete with a double check valve, you won’t need to install any additional Fluid Category 5 backflow protection device on the supply to this standpipe.

If you’re interested in this model or want information on the full range of Fluid Category 5 backflow prevention devices, such as our “Midi Break” for bin store wash down, please visit our Fluid Category 5.

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December 2017: Donation To ‘The Toy Project’

With sustainability in mind, Arrow Valves have made a charitable donation in place of Christmas cards

Merry Christmas from the Arrow Valves Team!

We have decided to again send e-cards in place of traditional paper cards for Christmas this year, as sustainability is very important to us . In place of traditional cards, we have donated £1,000 to ‘The TOY Project’ instead.

Every year in the UK over 20,000 children under the age of 18 experience the death of a parent – that is around 60 children and young people bereaved of a mother or father every day. ‘The Toy Project’ is a charitable organisation which helps children deal with their grief through play – providing toys for use by organisations involved with child bereavement.

In addition to their work supporting bereaved children, they provide toys to children in hospices, hospitals, refugee centres, nurseries, schools and vulnerable families.

We are confident that our donation will be put to good use over the Christmas period.

For further information please visit

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We’ve achieved ISO 14001:2015 Certification

Following our successful audit, we’ve received our registration certificate

Arrow Valves are delighted to announce that we are now ISO 14001:2015 certified. This certification applies to the processes influencing our Environmental Management Systems that we have in place.

ISO 14001 is an internationally recognised standard, set out by the International Organization for Standardization, establishing environmental management within businesses. We received our registration certificate on 3rd October 2017 following our successful independent audit.

This is an important milestone for us, as we continue to keep our environmental responsibility at the core of our business. If you would like any more information about us, or the standard, please do not hesitate to get in touch.


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A look at the current Water Regulations

Once the water company supplies you with the water, they don’t want it back!

Water Regulations – What are they?

The current Water Regulations came into force on 1st July 1999 in England and Wales. In Scotland, the Byelaws 2000 are technically identical. The Regulations are property of the government and are law.

The Regulations consist of:
The actual “Water Supply (Water Fittings) Regulations (1999)”
Schedules 1, 2 & 3
Government Guidance (G-Clauses)
Water Industry Clauses (R-Clauses)

The Regulations are in place to prevent waste, misuse, undue consumption, the erroneous measurement and contamination of water.
As manufacturers of Backflow Prevention devices, we are primarily concerned with contamination.

The concept of ‘fluid risk’ is central to backflow prevention.
Schedule 1 consists of five fluid categories each of which defines a level of risk.
Fluid Category 1 – Wholesome Drinking Water.
Fluid Category 2 – Change in the aesthetic quality.
Fluid Category 3 – Represents a slight health hazard.
Fluid Category 4 – Represents a significant health hazard.
Fluid Category 5 – Represents a serious health hazard.

Applications – where does this apply?

Many water fittings are at risk of backflow protection – but it’s the use of the water that determines the level of protection that you’ll need.
Some examples are listed below.

Hose Union Taps
Domestic House Gardens and similar applications are Fluid Category 3, whereas all commercial Hose Union Taps by default are Fluid Category 5.
The Water Authorities adopt a Risk Assessment Based Approach to this – and can downgrade if the application is deemed to pose less of a risk.

Clothes & Dish-washing
Domestic washers are classed as Fluid Category 3 due to the soaps and powders used. The items being washed in a domestic setting aren’t deemed to pose any significant or serious health hazard.
Washers used in non-house applications such as hotels, restaurants and high street launderettes would class as Fluid Category 4.
Further to this, washers used in Health Care Applications – such as Nursing Homes, and Veterinary Practices are deemed to be Fluid Category 5.

There are Water Fittings in the bathroom that also require backflow protection.
Bidets with submersible hoses pose the highest risk and need Fluid Category 5 protection.
Showers with submersible hoses also need protection. In a domestic situation – the risk is Fluid Category 3. However, in a health care setting, this risk is deemed to be Fluid Category 5.

These examples show that it is the use, not the type of fitting that determines the what level of protection required. If in doubt, always check with the relevant water company.

Solutions – we’ve got them – whatever the risk!

Here at Arrow Valves our purpose is protecting the public from illness and potential death via contaminated water through product innovation.

Fluid Category 1 – requires no protection.

Fluid Category 2 – Single Check – EA/EB (for example model EA453 – pictured. Applications include whole site zone protection, and risers).

Fluid Category 3 – Double Check – EC/ED (for example model ED20FM235 – designed for washing machines and dishwashers between valve and hose inlet).

Fluid Category 4 – Pipe Interrupter Type DB OR RPZ Valve – BA (pictured – a large range of different RPZ Valve Assemblies are available).

Fluid Category 5 – Pipe Interrupter Type DC OR an Air Gap – Type AA or AB. Our range of Break Tank and Booster sets (pictured – model BTMIDI) all come with an integral break tank with an AB Air Gap.

More Information…

We have a comprehensive range of Water Regulations Tutorials available for download here. These cover all this and more.

As well as this, all of our backflow prevention devices are available to view online.

We offer Free of Charge seminars on the Subject of the Water Regulations. These are presented by our Technical Director, Adrian Reeve, who has over 10 years’ experience in the Water Industry. Contact us for further details.

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Taking the guesswork out of dosing the system

Intelligent assurance for your heating system

More than just a Dosing Pot

Dose & Fill is a combined Pressurisation system with automatic dosing in a single, easy to operate unit. This WRAS approved product has been specifically developed to combat the growing costs and problems associated with sealed heating systems that are starved of inhibitor – flash corrosion, rusting radiators and sludge – to name a few.

The Dose & Fill saves space, eliminating the need for a traditional dosing pot. It also reduces labour and associated risks, as it negates the need for an operative to lift and pour chemical into a potentially hot dosing pot.

The top section houses a “Midi‐Fill” Digital Pressurisation Unit, and the lower half holds the 20 Lt chemical container, combining to take the guess work out of dosing the heating system.

Dose & Fill

Ideal for buildings dependent on reliable heating

“Midi‐Fill” Digital is an Advanced Pressurisation Unit providing Fluid Category 5 backflow protection for filling and pressurizing of “non‐house” heating or chilled water systems. Featuring:
* Anti‐seize pump and daily pulse * High and low pressure cut‐outs * Comprehensive BMS controls * Self‐test monitoring * Water meter with excess filling alarm * Pressure transducer for accurate filling

Cost and disruption associated with heating system shutdown are minimized as the unit executes a weekly self‐test with BMS alerts prior to failure.

The lockable display enables adjustment of cold fill, high cut‐out and excess water consumption values. Dose & Fill features a second digital display enabling inhibitor concentration to be set.

“Midi‐Fill” Digital and Dose & Fill are supplied fully assembled and tested and require no annual testing.

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Continuous Product Development

Water Regulations, Building Regulations… we’ve got you covered

Cavity walls built to current building regulations should be a minimum of 440mm thick.

Our products comply with the requirements of the Water Regulations, but we are also keen to ease constraints associated with all aspects of building compliance.

Our Rear Entry Hose Union Tap Boxes (15mm and 22mm) have been upgraded to come complete with 500mm pipe tails, negating the need for a joint within the cavity wall and thus reducing the risk of costly and inconvenient leaks.

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Product News & Innovations – Introducing the “Pillar Standpipe”

A neat and discrete installation – this standpipe is perfect for public watering

Be a “pillar” of society and comply with the Water Regulations.

Did you know that a broken 1/2″ tap can consume in excess of £70 of water per day?

Safeguard your water supply with our new lockable Pillar Standpipe.

When closed, all internal components, including the tap outlet, are completely concealed, ensuring a neat and secure installation that is completely tamperproof.

The unit features a Double Check Valve, providing Fluid Category 3 protection as required by the Water Regulations.

Internal insulation prevents tap fractures during frost and subsequent leakage.

Operating this standpipe is easy – inserting the tap outlet into the tap body automatically opens the flow of water with just one simple action. The tap outlet is also free to rotate to the optimum position for use.

Resembling a Pillar, this Standpipe Assembly is perfect for providing water to public spaces, such as retail parks, car parks, schools, gardens, caravan sites, golf courses and bowling greens.

The Pillar Standpipe is available to view on our website, or for further information, please contact us.

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