Not happy with with new unvented system, although it works fine. Shower pressure issue

[ShaunCorbs]

Non of them are correct let’s see what he says

also need them figures ?

 

[kash]

Non of them are correct let’s see what he says

he's just come back to me suggesting that this set up will be the one he intends to use.

What yould your suggestion be if none of them are correct?
updated diagram below.

I have looked at the Grundfos Scala2 pump you sent the link to. If I do get this, would it go BEFORE the unvented cylinder and FROM the water talnk in the loft.

Shaun - any chance of a quick chat?
[automerge]1577702731[/automerge]

Non of them are correct let’s see what he says

also need them figures ?

I'll get those figures thursday.

 

[ShaunCorbs]

You can’t pump from the outlet of the unvented cylinder (this would concern me he thinks he can do this) you sure he’s g3 registered?

would go water tanks
Pump
Cold supply to the Unvented cylinder
Cold Balanced supply to the bathrooms

 

[SJB060685]

You can’t pump from the outlet of the unvented cylinder (this would concern me he thinks he can do this) you sure he’s g3 registered?

would go water tanks
Pump
Cold supply to the Unvented cylinder
Cold Balanced supply to the bathrooms

I think his plumber is suggesting using the unvented cylinder as vented now Shaun!?

 

[kash]

You can’t pump from the outlet of the unvented cylinder (this would concern me he thinks he can do this) you sure he’s g3 registered?

would go water tanks
Pump
Cold supply to the Unvented cylinder
Cold Balanced supply to the bathrooms

Really appreciate the feedback and help - I don't want to waste any more money and time.

I'm going to show this thread to him later.

Someone actually came out to check his work and a NAPIT certificate was issued?

Is the now attached what your suggesting based upon your last comment (i ask as not sure what the 'balanced' cold bit refers to)

These are the tanks he is supplying: Polytank Cold Water Tank 25gallon (UK) 690 x 515 x 520mm - https://www.NoLinkingToThis/p/polytank-cold-water-tank-25gallon-uk-690-x-515-x-520mm/10500

The file can be edited from think link via draw.io if anyone wishes to edit?

Google Drive: Sign-in

 

[ShaunCorbs]

Will draw something up later

 

[kash]

Will draw something up later

Thank you. He's supposed to be coming to do the work thursday so trying to get the info I need before then to ensure we have the best set up/solution.

 

[ShaunCorbs]

like this would be the only way i would do it

need to know your supply so can work out if the tanks are enough eg 70l

 

[SJB060685]

So the pump would go on cold inlet to cylinder and pump through it to HW outlets Shaun?

 

[kash]

like this would be the only way i would do it

need to know your supply so can work out if the tanks are enough eg 70l

Thanks a million.

I think that all makes sense to me- apart from the unvented control block. What is that/how does it it work? Is this another unit device- rough cost?

And I see now shower pumps here- is there any way I could use this instead of the Grundfos pump as it’s at least another £400 ontop or the £700 he’s quoted me to do this week work- ontop of the £16-700 ive already paid.

Will show this to my guy and see what he thinks.

Can’t thank you enough for your input
[automerge]1577748044[/automerge]

like this would be the only way i would do it

need to know your supply so can work out if the tanks are enough eg 70l

Also, my unvented tank is 300L So think the 3 25gallon tanks = 340ish L? Should be enough?