Expansion vessel on a flexi - illegal?

[Ric2013]

Saw a photo a customer showed me of what seemed to be a flexi installed on an expansion vessel serving a small electric water heater by someone he found who was cheaper than me. I say 'seemed to be' because I'm not sure from the angle of the photo whether the flexi was attached to the vessel or elsewhere, possibly to the heater itself.

Can people with Level 3 or G3 registration please confirm whether flexis anywhere between a source of heat and the expansion vessel are absolutely wrong? Thank you.

 

[Pickwickpick]

Expansion vessels are normally attached with a braided hose.

 

[Riley]

Some unventeds come supplied with a 1/2”- 1/2” from hydro block to vessel

 

[Pickwickpick]

Firebird Expansion Vessel Flexi Hose, ACCCOMHOS | Buy at H.P.W.

Was it like the above?

 

[999]

There is flexible hoses available to buy used for the hotwater expansion into the vessal. Personally i like to pipe them up in copper

 

[ShaunCorbs]

they are allowed but not recommended

 

[townfanjon]

Always used to be connected by flexis but the trend now is to hard pipe them .

 

[Rob Foster]

Why would you deliberately build a weak link into a system ,
Copper is best centralheatking

 

[Ric2013]

Firebird Expansion Vessel Flexi Hose, ACCCOMHOS | Buy at H.P.W.

Was it like the above?

From the photo I saw of the install I couldn't tell the difference between a tap flexi and your one.

 

[Riley]

Maybe call manufacturer as the MIs will always win through