Microbore or 15mm pipes & which boiler? *Now with added queries!*

jamtart6

Hello!
We have had a quote for a 'normal' boiler and a Worcester boiler with a difference of about £200. Both boilers come with a 5 year guarantee from the plumber himself (parts+maintenance).

What the heck should I be looking for in a boiler? Which model is best? All I know is I need a combi boiler!

Any help gratefully received :A

gasbag1602

Worcestor bosch and valiant are the only boilers i would have in my house!

Beckymarshall07

Hello - I'm no expert but having had same dilemma and monitoring this forum the general consensus is the worcester or better still valliant are the boilers to go for. I also found a different website where the was a survey and most people were opting for valliant I have opted for a valliant for my 3 bed semi. It depends on how big your house is. Canucklehead who regular posts on here will be able to give you spot on advice.

Canucklehead

Hi...my ears were burning;)

In answer to the OP...get a full specification written quotation. In terms of a combi, the RGI should have have checked the mains water flow/pressure rates to determine if a combi is suitable as well as the gas supply. If you have more than 1 bathroom then most combis would struggle. I'd recommend Vaillant or Viessmann (and WB but only the CDi range).The OH would also fit a Boiler Buddy/Magnaclean, scale inhibitor (hard water areas only), powerflush system, fit TRVs, wireless programmable roomstat and lag (insulate) pipework where required.Quote should include notification via CORGI.

Take a look at this guide from the EST

A boiler is only as good as its installation and annual servicing.

HTH

Canucklehead

jamtart6

Ahh thanks for your info! This didn't pop back up in my subscribed threads. Would you reccomend getting 15mm pipes fitted -they are currently 8/10.

Our house is quite a small 3 bed semi. One bathroom (and maybe 1 downstairs loo)

thechippy

jamtart6 wrote: »

Ahh thanks for your info! This didn't pop back up in my subscribed threads. Would you reccomend getting 15mm pipes fitted -they are currently 8/10.

Our house is quite a small 3 bed semi. One bathroom (and maybe 1 downstairs loo)

Keep the microbore pipes. More efficient, less water to heat up..........;)

plumb1_2

jamtart6 wrote: »

Hello!
We have had a quote for a 'normal' boiler and a Worcester boiler with a difference of about £200. :A

What do you mean by a normal boiler?? Worcester dont only make combi's, they make boilers for normal pumpted sysytems.
They will be a lot more difference of £200 between a system boiler and a combi( both condensing).

jamtart6

a 'non-named' brand of combi is what i mean plumb1

Everyone I have spoken to has reccomended getting 15mm pipes - why do you suggest otherwise 'thechippy'

plumb1_2

jamtart6 wrote: »

a 'non-named' brand of combi is what i mean plumb1

Everyone I have spoken to has reccomended getting 15mm pipes - why do you suggest otherwise 'thechippy'

I wouldn't advise using a non branded boiler.
I would never use 8mm pipe, but i would pipe a rad up with 10 mmm(upto 4000btu) as i have found in the past that above that, prone to strugle to to keep the heat.
Make sure you system has a powerflush as part of the installation of a new boiler.

thechippy

jamtart6 wrote: »

a 'non-named' brand of combi is what i mean plumb1

Everyone I have spoken to has reccomended getting 15mm pipes - why do you suggest otherwise 'thechippy'

The smaller diameter makes them more efficient. Far less water for the boiler to heat up. I can't see any reason to change to 15mm.

jamtart6

Yep I thought the £200 extra was worth it for a worcester!

hmm interesting as both our dads have said 15mm is the way to go as they get the heat around properly??...and we'll be spending about £1000 more getting a whole new system put in so REALLY need to think if it will be worth it!

What is a powerflush?