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Frequently Asked Questions


How long will a filter last for?

The lifespan of a Filter is directly related to the volume and the hardness of the water it filters. Harder water means more work for the filter and therefore a reduced lifetime capacity.

For the Precision Filter which does more overall filtering, Moderately hard waters can give a lifespan of 80 litres, while harder waters can be around 40 litres.

For the Endurance filter this life span moves up to 120-60 litres respectively.

You can learn more about filter usage in our user guide here.


I am getting an unpleasant smell from the filter and water...

This phenomenon can only occur with the precision filter and can take place if the anion resin is sufficiently degraded There are a few areas where the water is extremely challenging and will degrade the anion resin resulting in shorter filter life with an aroma of trimethylamine when they’re spent (a fish-like smell). It is the unique solution of different minerals in the water that causes the filter to degrade faster, and not necessarily in the hardest of water areas.

Our advice if the results of the precision is what you are after, is to change the filter when this occurs. Alternatively it may be worth trying the endurance filter.


How does a Peak Water jug differ from other water jugs?

Peak Water is the first domestic water filter jug that has an adjustable bypass system. This means you can tailor the water filtration depending on the area and/or taste, wherever you are in the world, in order to make ideal brewing water for coffee.


Where can I buy new filters?

Filters will be available purchase from the Peak Water webstore. We'll soon be launching a filter subscription service that will allow users to customise replacement filter deliveries based on water hardness and overall usage. We also plan to make Peak Water Filters available to purchase via Amazon.


Which filter is better for me – Precision or Endurance?

Choosing between the two filters is a question of which filtration criteria you would like to prioritise. Both are suitable in the same range of waters. precision will allow for the most control and overall softening and will produce the best tasting coffee especially for filter coffee. but this filter has a shorter life span.

The Endurance will focus on alkalinity control (the most important for coffee) but will leave a higher TDS overall. The endurance is much more durable over time and will result in more litres filtered. A slightly higher TDS is often preferred for espresso.

In summary precision is more expensive per litre but can offer superior control, endurance comes in close to precision on taste but will last much longer.


How do I recycle my old Peak Water filters?

UK customers can return used filters by creating a prepaid returns label here https://peak-water.com/pages/recycling

Simply, allow your used filters to dry out and then return them to us in the original box (and plastic wrapping if you've kept it). Our team will then separate the resins from the plastics and regenerate them for use in future Filters.

This is currently a UK-only service and we are exploring ways to expand this service using our international recycling partners.


Do I get the same filters back from the recycling centre?

No, you will need to order new filters.


Should my new filter have moisture in the wrapping?

Yes. Resins need a high moisture content. In this case 60%. The moisture droplets that you may see in the wrapping of a new filter are a positive sign.


I can see small black particles in the jug...

These will be residue from the activated carbon. The carbon is harmless. This can come form the priming and first use of a filter. Simply rinse the jug liner and the filter to remove any particles and the issue should be resolved.


Are Peak Water jugs made using food safe materials?

Yes. We use BPA free, WRAS (complies with The Water Supply Regulations 1999) and FDA approved injection moulded plastic polymers. The resin inside our filters also adheres to these regulations.


Will the filter dry out if I leave it in the jug for a few days, without running water through it?

No, there is a small reservoir of water that stays in the filter chamber once the water has filtered through, to keep the filter hydrated. You don't need to keep the filter immersed in water.


How do I know if my filter is correctly inserted?

If you insert the filter and turn the dial to setting 5, put some water in the chamber, then pick the chamber up by the light blue inner sleeve. You should only see water coming out of the hole nearest the handle, as the bypass should be blocked off.


Will Peak Water filters help reduce limescale build up in my espresso machine or kettle?

Yes, Peak will help minimise limescale build up. Water that is ideal for coffee is quite soft, so Peak filters will reduce the bicarbonate and calcium carbonate that's in your tap water. However if the filter is set on a low bypass number this does mean scale forming minerals will still be in the water.

Please note, you'll still need to clean your machine using espresso machine cleaner to keep it in the best working condition.


When do I take the reading from the water test strip provided?

Submerge the test strip in your tap water sample for 5 seconds, then take it out and hold it still. Match the colour of the test strip to the chart provided after 10 seconds. This is important because the test strip will continue to get darker the longer you leave it.

Use your results with the user guide to find your recommended bypass setting.

More information can be found on page 9-10 of the user guide.


The water is filtering through too quickly...

This suggests that the filter isn't inserted correctly. Please follow these steps to make sure it is properly inserted.

Firstly, check there is nothing obstructing the filter in the upper light blue chamber. Once cear, insert the filter (pushing down firmly) and put the dial to setting 5, put some water in the upper chamber, then pick the chamber up by the light blue inner sleeve. You should only see water coming out of the hole nearest the handle, as the bypass should be blocked off.


My new filter is making the water yellow...

This suggests that the filter isn't inserted correctly. Please follow these steps to make sure it is properly inserted.

Firstly, check there is nothing obstructing the filter in the upper light blue chamber. Once cear, insert the filter (pushing down firmly) and put the dial to setting 5, put some water in the upper chamber, then pick the chamber up by the light blue inner sleeve. You should only see water coming out of the hole nearest the handle, as the bypass should be blocked off.