Water Filter FAQs

Your Water Filter Questions Answered

Buying a water filter is an investment, and you’ll naturally have a lot of questions before you buy. Here are some frequently asked questions about health, water and water filters; if you have more questions just get in touch.

If you have both whole house and under sink water filters then you’ll enjoy:

  • Purified water that tastes fresh with no chemical odour
  • The cleanest possible water that is 99.99% free from contaminants
  • Water that is remineralized by the Biocera filter so it is antioxidant and alkaline
  • Improvements to your immune system, health, skin and hair
  • Less limescale, prolonging the life of appliances
  • A cost-saving in comparison to buying bottled water
  • A sustainable, environmentally-friendly solution to sourcing purified drinking water (no more plastic bottles!).


Alkaline water is drinking water with a higher pH level (normally a pH of 8 or 9) than standard tap water (normally neutral at about 7 pH). Alkaline water also contains minerals and negative oxidation-reduction potential (ORP). The ORP is the ability of water to act as a pro- or antioxidant. The more negative the ORP value, the more antioxidizing it is – and we’ve all heard about the importance of antioxidants in health and anti-ageing.

Consequently, there’s a lot of excitement around alkaline water at the moment. More research is needed to confirm the benefits but there have been studies that show positive effects of alkaline water on health issues such as High Blood Pressure and Acid Reflux. It is also claimed that it supports our bodies to remove free radicals and helps prevent diseases such as Alzheimer’s and cancer.

It should be noted that naturally occurring mineral water generally has an alkaline pH level as it picks this up when it passes over or through rock and mountain springs.

There are different methods of producing alkaline water – the main ones being an electrical ionizer, Ion Exchange via ultrafiltration and A.A. Biocera filters. We believe the Biocera filters are the best method of producing alkaline water for a number of reasons:

  • Biocera remineralizes the water, mimicking the natural process of mineral water formation.
  • Rather than just changing the alkalinity of the water (as with an ionizer), Biocera releases beneficial minerals such as calcium, magnesium, sodium and potassium into the water.
  • An ionizer doesn’t remove other contaminants and impurities from the water. With the BMB Under Sink Water Filter, the Biocera filters are the last 2 filters out of 7. So, all the bad stuff has already been removed, then Biocera remineralizes and antioxidizes the water in the final stages.
  • No electricity required (more sustainable and environmentally friendly).
  • More cost-effective solution.

At water treatment works, drinking water is treated with a range of processes and chemicals are added to kill off bacteria. You may be tasting some of these chemicals, such as chlorine, in your tap water.

The BMB Nova Pro will help with hard water as it has two reverse osmosis membranes that take the calcium and magnesium out (the cause of hard water). After these have been taken out the Biocera filter remineralizes the water and Siliphos is added. Siliphos is glass-like polyphosphate silicate spheres which protect the water against scale and corrosion.

Tap water in the UK should be ‘safe’ to drink as there are standards for drinking water that water treatment companies should follow. However, it has been found to contain chemicals, pesticides, herbicides, toxins, hormones, antibiotics, fluoride, microplastics, bacteria, viruses, heavy metals and sediments.

Take a look at the annual reports from the Drinking Water Inspectorate (DWI), the independent regulator of water quality in England and Wales. Their 2019 report showed that:

  • 1,433 failures of regulatory standards were investigated
  • 75 legal notices were issued to water companies, including 2 prosecutions, with Northumbrian Water being fined £500,000 and Thames Water having 4 charges brought against them.

You may wonder if boiling your water makes it safe to drink? Boiling water does kill off harmful organisms such as E.coli, but it doesn’t get rid of other contaminants like heavy metals. In fact, it may even make them worse by concentrating them.

Our whole house water filter is the BMB 1000 Pro Nano. This is fitted at your stop tap and uses 4 filters to remove thousands of water contaminants (up to 97% of contaminants) with a 99% kill rate for bacteria.

This system significantly reduces possible contamination in your (municipal) water supply to give cleaner water to wash/bathe in, which has a beneficial effect on the skin. It also prolongs the life of your pipes and appliances by reducing scale and has anti-corrosion benefits throughout the entire house.

We sell and install the BMB Nova Pro + Biocera A.A Direct Flow Reverse Osmosis Water Filtration System, which is fitted under your kitchen sink. This water filter removes almost all known contaminants (99.99%) using 7 state-of-the-art filters including a Reverse Osmosis (RO) membrane to give you the cleanest, healthiest antioxidant, alkaline remineralized water for drinking, cooking and washing your organic fruit and veg with.

It will depend on your individual needs and situation (e.g. priorities, budget, location of stop tap, available space), but for the cleanest water possible we recommend installing both a point of entry and point of use water filtration system and we use both in our homes.

Our view is that a whole house water filter provides cleaner filtered water with additional health benefits that you really don’t want to miss out on, especially for the skin. However, if you want the absolute best quality water for drinking and washing food with, then installing an under sink water filter too is the way to go. The under sink system that we recommend puts your drinking water through reverse osmosis membranes and a Biocera filter – meaning you get the cleanest possible antioxidant, alkaline drinking water that is enriched with minerals.

You can install the Under Sink water filters yourself – if you are a competent DIYer. They come with a comprehensive instruction manual.

We recommend professional installation by a plumber for the BMB 1000 Pro Nano whole house system as this must be fitted at the mains.

The BMB Pro Nano Whole House System does not use electricity.

The BMB Nova Pro Under Sink System is a SMART meter with a pump so it does require electricity. For this water filter system you will need an electrical socket under your sink. If you don’t have one then we can quote for this and arrange it for you if we are your chosen installer.

We specialise in supplying and installing water filtration systems and replacement filters by BMB Technology. Why? Because we believe they offer the best water filtration and have the longest filter lifetime, being cost-effective for customers. We have spent hundreds of hours researching water quality in the UK, water purification methods and the different systems available.

Here’s what we found out:

  1. Drinking water in the UK often contains impurities, contaminants and bacteria (not convinced? Read the Drinking Water Inspectorate’s (DWI) report and check out the legal notices and prosecutions on water companies)
  2. Drinking bottled water is expensive, resource-intensive and all that plastic is just bad for the environment
  3. The healthiest drinking water from a tap should be purified by a filter and then re-mineralized so it becomes antioxidant, alkaline water
  4. The more levels and stages of water filtration, the more contaminants are removed
  5. Water filters have variable outputs and some need replacement filters more often, which can be costly in the long-run.

We believe the BMB Nova Pro is the only water filter that has multiple stage filtration removing 99.99% of contaminants and has a high-quality, long filter-life and has a good output and remineralizes the water with Biocera. And that’s why, along with the BMB Pro Nano, they’re the only products we sell.

Choice is great, but why sell others that aren’t as good?

For the BMB 1000 Pro Nano (Whole House):

You’ll need to buy a 12 Month/Full Set replacement filter pack every 12 months. This pack contains a full set of 4 water filter cartridges for the BMB 1000 Pro Nano. If you have very hard water then you may need to replace more often.

For the BMB Nova Pro (Under Sink)

Some filters need replacing every 12 months and some last up to 3 years. This list tells you which need replacing when:

  • Filter 1: 5 Micron Antibacterial Sediment – change every 12 months
  • Filter 2: CTO Coconut Shell Carbon – change every 12 months
  • Filter 3: 1 Micron Antibacterial Sediment with Coconut Shell Carbon – change every 12 months
  • Filter 4: 300 GPD Reverse Osmosis Membrane – up to 36 months, depending on water hardness
  • Filter 5: 300 GPD Reverse Osmosis Membrane – up to 36 months, depending on water hardness
  • Filter 6: Biocera A.A. Filter – change every 12 months
  • Filter 7: Biocera A.A. Filter – change every 12 months

We sell full and part packs, depending on your needs. Also, as the filter is a SMART system, it will alert you and tell you which filter needs changing.

The process of Reverse Osmosis (often called RO) is purifying water by pushing it under pressure through a semi-permeable membrane. The membrane has pores that are so small they only allow pure water to pass through, so larger molecules and bacteria are stopped.

Reverse osmosis can remove the majority of contaminants from water (up to 99%, including minerals) except for most soluble volatile organic compounds (VOCs), some pesticides, solvents, and chlorine. That’s why you should see RO filters in the middle of the filtration process – so other carbon pre-filters have already taken out the majority of contaminants, including chemicals such as chlorine.

Our Under Sink Water Filter uses two reverse osmosis filters as stages 4 and 5 of the filtration process. They do slow down the flow of your tap a little, but customers tell us that the benefits of purified drinking water outweigh this small drawback. If you do find that the flow rate is too slow for your needs then you can have an additional tank fitted, however in the majority of cases this is not necessary.

With reference to water filtering – sediments and contaminants are removed by passing water through filters that use zinc nano-particles (nano meaning ‘tiny’ or ‘minute’). Much of what is removed is so small that it can’t be seen.

Activated carbon filters are made from small pieces of carbon that have been treated to make them extremely porous. As water is pushed through activated carbon filters the contaminants stick to the carbon meaning purer water after filtering. Activated carbon filters can remove hundreds of different contaminants including chlorine, pesticides and herbicides.

BMB water filters use NSF Certified Coconut Shell Carbon, which has a very high capacity to reduce taste and odour compared to charcoal filters. The carbon block filter is also wrapped in a microporous cloth, which not only filters sediment but also protects the honeycomb style pores of the carbon from particles so their filter capacity is used on contaminants such as chlorine as opposed to dirt. To increase the adsorption process further, the carbon is treated with nitrogen to make it “activated”. This not only attracts the contaminants into the pores but also makes sure they stay there.

Delivery is free anywhere in mainland UK and we aim to deliver your order within 2 working days.

If we are installing your water filter system(s), then we will bring everything with us.

BMB water filters come with a 2 year manufacturer’s warranty.

Our 3 way filter taps come with a 1 year warranty on finish and 5 years on parts.

Whole house flow rate for ¾” pipe and 4 bar inlet pressure is about 33LPM. You should expect a 2-5% pressure loss in the system when the water is supplied according to these conditions. 

For whole house systems, we use the scale inhibitor technology ‘siliphos’. Scale effectiveness depends on the incoming water flow rate, temperature and water composition – so it can vary. However, we have generally seen performance similar to 50% of what you would get with a water softener.

If you want no scale at all, then a water softener via an under sink water filter is the best choice. However, there are advantages to whole house systems such as: no electricity required,  no waste water, cheaper to buy, cheaper to own, etc.

Yes, water filtration systems can be uninstalled and reinstalled at a new property.

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