Put an end to distracting and annoying boiler noise. This Flume System Silencer is specifically designed to tackle the common issue of boiler 'kettling', which is caused by limescale deposits on the heat exchanger.

The non-acidic, non-caustic formulation is safe for all types of central heating systems, including those containing aluminium components. It works to break down the scale, restoring quiet operation and improving heat transfer efficiency. For best results, use in conjunction with Flume Inhibitor to prevent future build-up.

• Reduces boiler noise – targets limescale build-up on the heat exchanger.
• Improves efficiency – helps to restore heat transfer for better performance.
• Universal compatibility – safe for all types of central heating systems, including aluminium.
• Long-term protection – can be left in the system to provide ongoing protection.
• Available in a choice of sizes – including 1L and a 500ml concentrate.

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.