Quote for Boiler Upgrade - Reasonable ?

keith969

NinaSwiss wrote: »

I'm considering a loft conversion for the future so need to keep the loft space clear for that - I also asked for some pipes to be left which would make it easier to add some plumbing into the loft for central heating/hot water.

I don't have a loft - hence why the pressurised unvented system. I have the hot water cylinder in the garage, though.

Alex1983

Mike_the_Boilerman wrote: »

Oh I see. That puts things in a completely different light. Powerflushing is a right racket in my view, don't get me started!! Have you seen my article about it? https://www.miketheboilerman.com/the-powerflushing-myth.html

One thing I don't address in my article is how it relates to the 'pumping over' problem. Or doesn't, more accurately. Pumping over is usually caused by scale accumulating in the tee fitting where the pipe from the header tank joins the system proper. Power-flushing sort of helps as the flushing chemicals dissolve some of the scale away so I'm not surprised the powerflush helped temporarily. The tee fitting on your system is quite likely to still be partially blocked which is why turning the pump speed down helped. The tee fitting needs cutting out and a new one putting in, in my personal opinion.

A new boiler also addresses the problem in an oblique way because in fitting the new boiler, your system will be converted to a sealed system and the header tank and tee fitting dispensed with. Your current boiler might possibly be suitable for conversion to sealed system. What make and model do you have?

Pumping over happens because ch water is taking the path of least resistance, hence pumping up the open vent instead of around the heating system....

It can be caused by a partial blockage at the cold feed/ open vent or a incorrect piped cold feed/ open vent but can be caused by a restricted system and a power flush will cure that. To say powerflushing is a myth is crazy.

Taking water samples before and after shows powerflushing works when done properly.

fezster

I think Mike's post was to highlight that a Power Flush is far too often used as a catch-all solution to any problem, especially by the likes of British Gas. No guarantee is ever given it will solve the problem, so it seems to be an easy money spinner - it's right for people to be made aware of this tactic and question exactly why a Power Flush is being recommended. There's no doubt it serves a purpose in the right circumstances.

Risteard

southcoastrgi wrote: »

Why are you just getting quotes for WB

Perhaps it's to annoy you.

NinaSwiss

Just received quote from Boiler R Us which seems the best so far:

• £3,192 but cash price with invoice is £3000 (I need to call to clarify what this means)
• 10 years warranty extended to 15,
• Chemical Flush
• Includes spirotec magnetic filter (they could use existing 2 year old one but I've asked for a new one to avoid warranty arguments should filter fail.). Filter has a 20yr guarantee .
• No need to cut kitchen worktops as will use different route. However they can also do the cutting if needed as they have diamond cutters.

Power flush is an option for an additional £325 - Which I would definitely opt for.

NinaSwiss

Boiler for this quote is ecoFIT pure 35KW (given higher flow rate for possible future extension)

NinaSwiss

Question - Looking at the Valiant boiler eco fit model, there is a 25kw,30kw and 35kw.

Given that my mains flow rate is 13l/m, is it still worthwhile going with the 35kw which has 14l/min flow rate. The 30kw is 12.2l/min
There is only £100 price difference so I'm okay either way.

bris

For a 3 bedroom with only 7 radiators 30kw is more than enough.


Forget all the hype over the 15 year warranty though, anyone can do that but they might not be around long enough for you to use it.


Valliant are good though so if the manufactures warranty is ten years then that's good, don't rely on the other 5 though and make sure they are valliant approved to give you this warranty.

NinaSwiss

Another question I'm afraid...

Under a combi system, is it true that shower goes cold/stops/trickles when toilet is flushed or other cold taps are turned on? if that's the case then I guess I can add washing machine and dishwasher to this.

I thought this only happens when hot water (not cold supplies) is turned on elsewhere.
I have a second toilet which is in regular use in the mornings whilst upstairs bathroom is occupied. And there are 4 of us in the house at the moment.

southcoastrgi

Ganga wrote: »

Have been told Intergas are very good.

They are very good