solid fuel stove

[drainrod]

planning fitting solid fuel stove to run rads, do i have to fit glassfibre expansion cistern or can i use plastic?

 

[Gray0689]

Should be metal feed&expansion and metal float

 

[drainrod]

cheers ,thought so, glass fibre with copper float is suitable, But i have found gas board using plastic

 

[Best]

Nearly all I see are plastic, but bit scary if boiling water starts boiling up the expansion.

 

[dancinplumba]

cheers ,thought so, glass fibre with copper float is suitable, But i have found gas board using plastic

do they fit solid fuel stoves ?

 

[Nostrum]

Must be capable of withstanding 110 degrees, some plastic tanks are so I hear. Either way no matter what's its made of, the above temperature is the required specification.

 

[SimonG]

I thought I'd seen some new plastic tanks with the relevant BS for solid fuel. Think they are made by kingspan.

 

[Gray0689]

I thought I'd seen some new plastic tanks with the relevant BS for solid fuel. Think they are made by kingspan.

Lol kingspan make everything now

 

[drainrod]

yes, in scotland anyway, charnwood stoves, rads, plus heat leak rad in loft. but for some reason fit plastic expansion cistern,

 

[drainrod]

yes saw those tanks but its not them they use,because i ask the wholesaler that supplies gas board

 

[AWheating]

Some plastic tanks do reach the british standard required, which if memory serves needs to be able to handle a certain temp (around 100*c) for a certain number of hours. Most stove manufacturers instructions require the use of a metal tank so you must fit one as MI must be followed. I would not want to fit a plastic one even if it met the BS because i cant see how you can rate one based on duration of use? it should be able to contain a fault temp for its entire working life.

 

[peteheat]

Some plastic tanks do reach the british standard required, which if memory serves needs to be able to handle a certain temp (around 100*c) for a certain number of hours. Most stove manufacturers instructions require the use of a metal tank so you must fit one as MI must be followed. I would not want to fit a plastic one even if it met the BS because i cant see how you can rate one based on duration of use? it should be able to contain a fault temp for its entire working life.

Never had or seen a problem with a plastic header tank, I have seen lots of galvanised tanks rot, maybe I like them because they never let me down (yet).

 

[Best]

Never had or seen a problem with a plastic header tank, I have seen lots of galvanised tanks rot, maybe I like them because they never let me down (yet).

Yes, the ordinary plastic expansion tanks seem to take boiling water without much problem, though some do bulge a bit.
Did see a round expansion tank, think some were made by Marley, crack on it's base & was shocked to find the base could be snapped in bits like a biscuit! Was fairly old admit.
Seen the plastic ball valve float destroyed with hot water from vent pipe.

 

[Gray0689]

The thing is do you really want to take the chance of the possibility of boiling water potentially being in a plastic tank above someone's bedroom !!
Think I'd be happier with metal!

 

[AWheating]

Never had or seen a problem with a plastic header tank, I have seen lots of galvanised tanks rot, maybe I like them because they never let me down (yet).

if it meets the relevant standards and the stove/boilers manufacturers instructions say its ok then you can use plastic. Most ive seen state metal.
me personally would not, a rotten metal tank will leak some water, a plastic tank will fail and drop gallons of water onto whats below. Hopefully its been fitted correctly over a load bearing structure away from bed positions etc.....

 

[peteheat]

We usually fit them over the main storage tank because we are looking for the increased head of pressure and usually tee off the main supply to the storage tank.

Being honest I have to say the purpose was never to dump any of the contents into the storage tank in the event of tank failure in fact we always ran a separate overflow as nobody wants the contents of the header in their bath water, maybe we were getting a safety factor by default.

The header isn't really meant to used for water to expand or blow off to on a regular basis although I have come across some with a constant dribble from the expansion.