Beware of cheap flex liners.

Martyn Bridges, director of technical communication and product management at Worcester, Bosch Group, is concerned that some installers could be compromising their customers’ safety by fitting flue plume redirection kits, for example, that haven’t been tested, approved or certified for use with their boiler. It appears that as more and more of these components are being bought online it’s vital that proper care is taken to assure they are fit for purpose.

Mr Bridges expresses his concerns:

“We’re seeing a growing number of suppliers selling generic heating accessories such as flue kits that they claim are compatible with a given manufacturer’s boiler, but have never actually been tested to the required standards.

While these products may match the physical size and dimensions of the manufacturer’s flue, it is important for installers to realise that the absence of a CE mark means there is no proof that they meet the UK’s safety, health and environmental requirements.

Worse still, with no testing having taken place, there is no evidence or guarantee that the flue kit won’t be susceptible to damage such as freezing, cracking, or degrading in the sun.”

He calls for installers to be extra vigilant in selecting the most suitable appliances and accessories for their customer’s property. Generic alternatives may be cheaper but making a choice based on this factors alone is potentially risky for something as critical as a flue system.

utting the obvious safety issues aside, there’s more at stake, as fitting something that’s not approved by the manufacturer of the boiler (or stove) will usually invalidate its warranty.