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Sentinel X700 biocide 1 litre X700L-1L

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Sentinel X700 biocide 1 litre X700L-1L

A 1-litre biocide and fungicide for the primary circuit of underfloor heating and low-temperature hot water systems, preventing bacterial and fungal contamination.

At a glance

Manufacturer part no.
X700
Showing prices

£28.88

£24.07 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

Sentinel X700 Biocide (order code X700L-1L) is a liquid treatment made by Sentinel that prevents biological contamination in underfloor heating systems. It protects against bacterial and fungal growth that can cause blockages, unpleasant odours and corrosion, particularly where reduced flow rates in low-temperature systems allow bacteria and fungi to thrive.

Signs this part needs replacing

  • Unpleasant or musty odours from the underfloor heating system
  • Slimy deposits or blockages in pipework or manifolds
  • Uneven heating across underfloor loops
  • System water discoloured or contaminated

Before you order

  • Confirm your system volume so you dose at the correct rate (1L per 300L)
  • Check compatibility with any existing inhibitor already in the system
  • Circulate the system for 30 minutes after dosing to ensure complete distribution
  • Do not mix with other cleaning products except those specified by Sentinel

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.