Protect your central heating system from damaging corrosion and limescale build-up. This high-performance system inhibitor is formulated to safeguard all system components, including those made from aluminium, extending the life of your boiler and radiators.

By preventing the formation of sludge and scale, it helps to maintain optimal efficiency, reduce boiler noise and prevent hydrogen gassing. Its non-acidic, NSF-approved formula is safe to handle and suitable for all types of indirect central heating systems.

• Comprehensive protection – prevents scale, corrosion and sludge build-up.
• Maintains efficiency – helps to reduce boiler noise and energy costs.
• Universal compatibility – suitable for all indirect heating systems, including those with aluminium parts.
• NSF approved – certified quality for high performance and safety.
• Available in a choice of sizes – including 500ml and 1L.

Delivery (UK mainland only)

 

Next Day: £5, or FREE over £40

- Order by 9pm Mon-Thu: next working day

- Order Fri to 5pm Sun: Monday

- Order after 5pm Sun: Tuesday

 

Pre-12pm: £10

- Same cut-offs as Next Day above

 

Saturday & Sunday: £10, or £5 over £40, or FREE over £75

- Saturday: order by 6pm Fri

- Sunday: order by 4pm Sat

 

Heavy items (over 30kg)

- Mon-Fri only. Order by 6pm and allow up to two working days

- Order after 6pm Thu: arrives after the weekend

 

Supplier items

- Sent directly by the supplier, so timings vary. Lead times appear on the product page in working days (Mon-Fri)

 

More about delivery 

Next Business Day Collection (eligible items)

- Order by 9pm Mon-Thu: collect next day

- Order after 9pm Thu to 5pm Sun: collect Monday

- Heavy items (over 30kg): allow up to two working days

 

Opening hours

- Weekdays vary by branch: open 6:30am-7am, close 6pm-8pm

- Saturday: 7am-6pm

- Sunday: 9am-4pm

 

Check your local store's hours and that it's open before visiting. Please wait for our text or email before collecting.

 

Holding your order
We'll hold it for 14 days, then automatically refund your original payment method.