Everpure 4C Under Sink Filter System – Replacement Kit for BW100/BW400 Systems - Filter Flair
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Everpure 4C Under Sink Filter System – Replacement Kit for BW100/BW400 Systems

MPN

£99.99 inc. VAT

In stock Ready to dispatch
  • 0.5 micron
  • 1.9 lpm
  • High flow
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FREE Express Delivery UK orders over £60
Next Day Delivery £6.99
Standard Delivery £3.99 for 2-3 days

*Applies when Next Day Delivery is selected at checkout.

Delivery information

Order before the delivery cut-off for the fastest available dispatch. Delivery options and final prices are confirmed at checkout.

Replacement filters Find replacement filters and maintenance parts Keep your system performing with the right service parts.

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What our customers say

5.0 out of 5 (1 review)

The item was good. Easy enough to install and it works well. It was to replace a Culligan filter and the advantage of the new head is that the large shroud that covers the whole of the top of the filter is replaced by a smaller attachment to the plastic head and so does not have the problem of the very tight fit that the old style head had on the cannister especially when slightly corroded. It is better to cut back the microbore plastic tubes from the mains water and to the filtered water tap because the old plastic tube ends get compressed in the old head and so leak a bit unless trimmed back to fresh tube. Scissors are fine. It is also better to add some PTFE tape to the plastic screw thread of the adaptors that attach the microbore tubes to the new head. There are no o rings to seal the adaptor so the leak pressure will be safer by using a bit of PTFE tape. The fixing bracket is exactly the same as the old style head. If doing on a regular basis it is a10 min job or less, but on a once-only amateur basis it is more like 30 mins depending on how long you think about what to do. Definitely worth buying and definitely easy enough for limited-skill amateur fitting. If you have done a bit of DIY plumbing before. All easy overall.
— Andrew Prior

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The Everpure 4C Replacement Kit provides a complete, ready-to-install solution for customers upgrading from the discontinued Everpure BW100 (DW100F) or BW400 (DW400F) systems. This kit has been specifically curated to ensure a seamless transition, allowing direct connection to your existing 1/4" tubing without requiring additional plumbing modifications.

System Components Included:

  • Everpure QL3B Filter Head: Professional-grade filter head designed for reliable, sanitary quick-change operation. The QL3B ensures compatibility and secure locking of the specified cartridge. Supplied with 2 x 3/8" x 3/4" Male Adapters.

  • Everpure 4C Water Filter Cartridge (EV960100): A high-performance filtration cartridge featuring Micro-Pure II media with sub-micron technology (0.5 micron nominal). The 4C significantly reduces chlorine, associated tastes, odour, and fine particulates while retaining beneficial minerals – delivering equivalent or superior performance to the discontinued BW series cartridges.

  • 2 x John Guest Male Adapter (3/8" Male NPTF x 1/4" Push Fit): These adapters connect directly to the QL3B head and accept your existing 1/4" push-fit tubing from your previous BW system installation. Simply disconnect your old system, install the new kit, and push your existing tubes into place – no specialist tools or additional fittings required.

Upgrade Benefits:

  • Direct Replacement Compatibility: Designed specifically for BW100 and BW400 users, eliminating the need to source discontinued cartridges or modify existing pipework.
  • Improved Cartridge Availability: The 4C cartridge is part of Everpure's current core range, ensuring long-term availability of replacement filters.
  • Enhanced Filtration Performance: The 4C delivers comprehensive chlorine, taste, and odour reduction with effective particulate removal, maintaining the high water quality standards expected from Everpure systems.
  • Tool-Free Installation: The John Guest push-fit adapters allow connection of your existing 1/4" tubing in seconds – simply push to connect, pull the collet to release.
Product Details

The Everpure 4C Replacement Kit provides a complete, ready-to-install solution for customers upgrading from the discontinued Everpure BW100 (DW100F) or BW400 (DW400F) systems. This kit has been specifically curated to ensure a seamless transition, allowing direct connection to your existing 1/4" tubing without requiring additional plumbing modifications.

System Components Included:

  • Everpure QL3B Filter Head: Professional-grade filter head designed for reliable, sanitary quick-change operation. The QL3B ensures compatibility and secure locking of the specified cartridge. Supplied with 2 x 3/8" x 3/4" Male Adapters.

  • Everpure 4C Water Filter Cartridge (EV960100): A high-performance filtration cartridge featuring Micro-Pure II media with sub-micron technology (0.5 micron nominal). The 4C significantly reduces chlorine, associated tastes, odour, and fine particulates while retaining beneficial minerals – delivering equivalent or superior performance to the discontinued BW series cartridges.

  • 2 x John Guest Male Adapter (3/8" Male NPTF x 1/4" Push Fit): These adapters connect directly to the QL3B head and accept your existing 1/4" push-fit tubing from your previous BW system installation. Simply disconnect your old system, install the new kit, and push your existing tubes into place – no specialist tools or additional fittings required.

Upgrade Benefits:

  • Direct Replacement Compatibility: Designed specifically for BW100 and BW400 users, eliminating the need to source discontinued cartridges or modify existing pipework.
  • Improved Cartridge Availability: The 4C cartridge is part of Everpure's current core range, ensuring long-term availability of replacement filters.
  • Enhanced Filtration Performance: The 4C delivers comprehensive chlorine, taste, and odour reduction with effective particulate removal, maintaining the high water quality standards expected from Everpure systems.
  • Tool-Free Installation: The John Guest push-fit adapters allow connection of your existing 1/4" tubing in seconds – simply push to connect, pull the collet to release.
Specifications
MPN
4CSYS02
Brand
Everpure
Product type
Complete Systems
Material
Whole home protection
Installation

Follow the manufacturer’s installation guidance, confirm all connections are secure and flush the product as instructed before regular use.

Delivery & Returns

Order before our dispatch cut-off — 3pm Monday to Friday, or 12pm on Saturday — and your order is sent the same day; anything after that follows the next working day. We don’t dispatch on Sundays, and you’ll get a tracking link by email as soon as your order is on its way.

Choose your UK delivery option at checkout:

  • Free Express Delivery — free on orders over £60 (2–3 working days).
  • Standard Delivery — £3.99 (2–3 working days).
  • Next Day Delivery — £6.99, arriving the next working day when you order before the cut-off.

We also ship internationally, with rates calculated at checkout.

Returns & refunds

Changed your mind? You have 30 days to return any unused filter in its original sealed packaging for a refund, or 90 days for exchanges. Start at our returns portal and either generate a prepaid Royal Mail label (£3.49, deducted from your refund) or use your own courier — exchanges are always free to return. We approve refunds within 24 hours of your return reaching us; your bank may then take 3–5 working days to show the funds.