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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.

Moderately hard waters can give a lifespan of 80 litres, while harder waters can be around 40 litres.

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

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. 

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.

UK customers can return used filters by creating a prepaid returns label here

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.

Our distributors listed on our ‘Find Peak Water in your country’ page can take your used filters back from you. We then collect them in large batches from our distributors to be recycled.

Alternatively, if you can’t get your used filters to your nearest distributor easily but still wish to have them recycled, we would be very grateful if you could send them to our recycling centre.

Peak Water Recycling Centre


Regal House 

South Road 


CM20 2BL

United Kingdom

No, you will need to order new filters.

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. 

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. 

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.

There are a few areas where the water is extremely challenging for our resin to filter and in these areas, we are experiencing a shortened 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.

We altered our resin mix to try to combat this, however this still struggles in the most challenging areas.

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.

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.

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. 

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

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.

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.