McAlpine Scale Defender Refill Pack | 2 x Replacement Cartridges | 40,000L Each

Description

Keep your McAlpine Scale Defender performing at full effectiveness with this genuine Refill Pack. Each pack contains 2 replacement polyphosphate cartridges — simply swap out the spent cartridge when needed, no tools, no plumber, no fuss. Each cartridge treats up to 40,000 litres, so this pack gives you two full service cycles of whole-home limescale protection.

What's Included

  • 2 × McAlpine Scale Defender replacement cartridges
  • Each cartridge treats up to 40,000L

Key Features

  • Genuine McAlpine replacement cartridges — designed specifically for the McAlpine Scale Defender unit
  • 40,000L capacity per cartridge — long-lasting protection between replacements
  • Food-grade polyphosphate — WHO and FAO approved, safe for drinking water, BS EN 1212 certified
  • Easy DIY replacement — no plumber needed, no tools required, takes just minutes
  • Saves money — a 1mm limescale build-up can add £150–£200 to annual energy bills (Carbon Trust)
  • 2-pack value — two full service cycles in one purchase

Technical Specification

  • Brand: McAlpine
  • SKU: SCA-RE
  • Pack contents: 2 x replacement cartridges
  • Cartridge capacity: 40,000L per cartridge
  • Active ingredient: Food-grade polyphosphate
  • Connections: ¾” Male BSP with 15mm & 22mm fittings
  • Working pressure: 0.5 – 10 Bar
  • Test pressure: 25 Bar
  • Temperature range: 1°C – 40°C
  • Max water flow rate: 3,000 L/hr
  • Pressure loss (max): ±0.3 Bar
  • Compliance: BS EN 1212 | EC drinking water regulations
  • Weight: 0.41 kg
  • Country of Origin: United Kingdom

Frequently Asked Questions

  • Which unit does this fit?
    These cartridges are designed for use with the McAlpine Scale Defender unit (SCA-STA). They are not compatible with other brands.
  • How often do I need to replace the cartridge?
    Each cartridge lasts up to 40,000 litres. For an average UK household, this is typically once every 6–12 months depending on water usage and hardness.
  • Do I need a plumber to replace it?
    No — cartridge replacement is a simple DIY job. No tools or specialist knowledge are required.
  • Is the polyphosphate safe?
    Yes — it is food-grade, WHO and FAO approved, and complies fully with BS EN 1212 and EC drinking water regulations.
  • Can I order if the item shows as out of stock?
    Yes — this item is ordered in specially for you and will typically be dispatched within 5–7 working days.
  • When will my order be dispatched?
    As this item is ordered in to fulfil your order, please allow 5–7 working days for dispatch.

Delivery Information

This is a small, postable item covered by a one-off small item delivery charge. You can combine it with other small items in a single order and pay just one delivery charge. Browse all items covered by the small delivery charge.

Complete Your McAlpine Scale Defender System

Don't have a Scale Defender unit yet? Start here:

McAlpine Scale Defender Refill Pack | 2 x Replacement Cartridges | 40,000L Each

Product form

📦 £4.99 Delivery: A small item delivery charge applies — you can combine multiple small items in a single order and pay just one charge.

Keep your McAlpine Scale Defender performing at full effectiveness with this genuine Refill Pack. Each pack contains 2 replacement polyphosphate... Read more

Free pickup in our shop(s)

£149.00  £95.00

Only £4.99 Delivery

    • Guaranteed secure & safe checkout.

      paypal
    • We aim to dispatch stocked items same day 1-2 day delivery
    • Non stocked items are ordered direct 2-7 day delivery
    • Several items? ask for a bespoke price!
    • Wetwall Free Delivery On Orders Over £250
    • FREE Collection from Norwich
    • No hassle returns, 30 days return

    Description

    Keep your McAlpine Scale Defender performing at full effectiveness with this genuine Refill Pack. Each pack contains 2 replacement polyphosphate cartridges — simply swap out the spent cartridge when needed, no tools, no plumber, no fuss. Each cartridge treats up to 40,000 litres, so this pack gives you two full service cycles of whole-home limescale protection.

    What's Included

    • 2 × McAlpine Scale Defender replacement cartridges
    • Each cartridge treats up to 40,000L

    Key Features

    • Genuine McAlpine replacement cartridges — designed specifically for the McAlpine Scale Defender unit
    • 40,000L capacity per cartridge — long-lasting protection between replacements
    • Food-grade polyphosphate — WHO and FAO approved, safe for drinking water, BS EN 1212 certified
    • Easy DIY replacement — no plumber needed, no tools required, takes just minutes
    • Saves money — a 1mm limescale build-up can add £150–£200 to annual energy bills (Carbon Trust)
    • 2-pack value — two full service cycles in one purchase

    Technical Specification

    • Brand: McAlpine
    • SKU: SCA-RE
    • Pack contents: 2 x replacement cartridges
    • Cartridge capacity: 40,000L per cartridge
    • Active ingredient: Food-grade polyphosphate
    • Connections: ¾” Male BSP with 15mm & 22mm fittings
    • Working pressure: 0.5 – 10 Bar
    • Test pressure: 25 Bar
    • Temperature range: 1°C – 40°C
    • Max water flow rate: 3,000 L/hr
    • Pressure loss (max): ±0.3 Bar
    • Compliance: BS EN 1212 | EC drinking water regulations
    • Weight: 0.41 kg
    • Country of Origin: United Kingdom

    Frequently Asked Questions

    • Which unit does this fit?
      These cartridges are designed for use with the McAlpine Scale Defender unit (SCA-STA). They are not compatible with other brands.
    • How often do I need to replace the cartridge?
      Each cartridge lasts up to 40,000 litres. For an average UK household, this is typically once every 6–12 months depending on water usage and hardness.
    • Do I need a plumber to replace it?
      No — cartridge replacement is a simple DIY job. No tools or specialist knowledge are required.
    • Is the polyphosphate safe?
      Yes — it is food-grade, WHO and FAO approved, and complies fully with BS EN 1212 and EC drinking water regulations.
    • Can I order if the item shows as out of stock?
      Yes — this item is ordered in specially for you and will typically be dispatched within 5–7 working days.
    • When will my order be dispatched?
      As this item is ordered in to fulfil your order, please allow 5–7 working days for dispatch.

    Delivery Information

    This is a small, postable item covered by a one-off small item delivery charge. You can combine it with other small items in a single order and pay just one delivery charge. Browse all items covered by the small delivery charge.

    Complete Your McAlpine Scale Defender System

    Don't have a Scale Defender unit yet? Start here:

    Top 10 best selling products

    You may also like these products. These products are rated as 'top 10 best of the best' by our clients

    Shop now

    Returns & Delivery

    When will my order be delivered?

    Your order will be packaged really carefully and delivered wherever you want. Delivery takes between 2-4 business days. Look out for emails from our delivery partners, You will receive an e-mail after ordering with more information about the delivery.

    Can I return my product?

    Orders can be returned or exchanged within 30 days of receiving the parcel, providing they are in original resalable condition.

    What can I do if my item (or part of it) is damaged?

    We work hard to deliver your items without damage. If anything arrives damaged on delivery just refuse the delivery, Any damages found after delivery must be reported with photographic evidence. Orders can be returned or exchanged within 30 days of receiving the delivery, providing they are in original resalable condition.

    Recently viewed products

      © 2026 Bubblegum Bathrooms, Powered by Shopify

        • American Express
        • Apple Pay
        • Diners Club
        • Discover
        • Google Pay
        • Klarna
        • Maestro
        • Mastercard
        • PayPal
        • Shop Pay
        • Union Pay
        • Visa

        Login

        Forgot your password?

        Don't have an account yet?
        Create account

        Sign up for our newsletter

        Sign up for our newsletter

        Subscribe to our emails