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Vented system to Combi

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Hi,

So I can get my head around the work involved in this. currently have vented system with boiler in kitchen. Moving to Combi, staying in kitchen. has 22mm gas suuply and condense pipe can go straight out the wall. Hot & cold already in cupboard.

in the airing cupbaord what needs to be done to the Feed & Return here? system is as below but with 2 valves one for heating one for HW.

upload_2019-4-30_15-22-57.png
 
I’d still be dubious, have they mentioned gas pipe sizing? I’m sorry it’s way too cheap. Are they all gas safe??
 
You’re asking for professional opinion we are giving you professional opinion it’s way too cheap to be a quality job
 
I’d still be dubious, have they mentioned gas pipe sizing? I’m sorry it’s way too cheap. Are they all gas safe??
Yes. As said gas is 22mm. Why would you think I should pay a plumber more than £450 for a day? Boiler is going in the same place as original and they need to do some alterations in the airing cupboard. Or are you all the 1k a day plumbers/brain surgeons.
 
Given your initial question, and the very cheap quotes, I'm starting to suspect you may be doing alot of the work yourself.
 
Yes. As said gas is 22mm. Why would you think I should pay a plumber more than £450 for a day? Boiler is going in the same place as original and they need to do some alterations in the airing cupboard. Or are you all the 1k a day plumbers/brain surgeons.

So it’s one guy on his own?
What about other materials copper, controls etc?
 
We're not trying to wind you up, but a combi conversion, (a proper one) isn't a days work. And anyone quoting £1500 for a boiler install is either in desperate need of the work or they're not registering/declaring the work.
 
We're not trying to wind you up, but a combi conversion, (a proper one) isn't a days work. And anyone quoting £1500 for a boiler install is either in desperate need of the work or they're not registering/declaring the work.
I’m sure you feel you are correct, but I don’t know why you would know more than 3 plumbers that have been in my property and seen it with their own eyes and come highly recommended.

What could possibly take longer than a day? Boiler goes in cupboard, gas already there, condense pipe straight through wall, hot and cold already there. Flow return already there. Airing cupboard, do the adjustments that I don’t know what is done because everyone wants to be a know it all instead of answering my initial question except for the helpful response from Scott.

Again, you must be the 1k brain surgeon?
 
How big is the heating system ?
The residual head on the pumps in the large combi's often results in circulation problems.

I can almost guarantee you will regret installing a combi to do 2 bathrooms & if you don't replace the existing 22mm hot water pipe work with 15mm it will take so long to arrive the wife will not be happy.

And not so much of the brain surgeons - £1k remarks if you please. I might not be a surgeon but my skill set means I don't need to be chasing the kind of money you seem to think we are worth!
 
I’m sure you feel you are correct, but I don’t know why you would know more than 3 plumbers that have been in my property and seen it with their own eyes and come highly recommended.

What could possibly take longer than a day? Boiler goes in cupboard, gas already there, condense pipe straight through wall, hot and cold already there. Flow return already there. Airing cupboard, do the adjustments that I don’t know what is done because everyone wants to be a know it all instead of answering my initial question except for the helpful response from Scott.

Again, you must be the 1k brain surgeon?
I wish I was but unfortunately I'm not a £1k a day brain surgeon. And don't take this the wrong way but you seem to be a typical customer who believes everything takes 5 minutes. I'm not saying I know more than the 3 plumbers who have viewed the job, but I don't have to to know that somethings off. I wouldn't entertain a combi swap for £1500 10 years ago, never mind now.

You supplying the hive and associated pipework could knock around £300 off the bill but even considering that, it's still cheap. I'll say again, we're not trying to wind you up but most if not all plumbers on this forum have seen the results of cheap work. Once you've paid them you will likely never see them again and will end up paying again to put the work right.
You didn't actually answer my question earlier though. Have they asked for cash?
 
I recon the boiler will be damaged from its fall of the back of the lorry it was on. Are all three of those plumbers you've had round doing it as it's only taking one day. Anyway must get back to my patient who needs his brain putting back in.
 
Last one I did

Worcester 30i so around the same price as the 636

Took 3 days Boiler went in airing cupboard

Materials

Boiler
Flue
Nest
Maggy
Shock arrestor
Filling loop
4 lengths of 22mm
1 length of 15mm
2 lengths of 11/2 waste pipe

Plus odds and sods that you forget

Price was around 2.5k Mark
 
Last one I did

Worcester 30i so around the same price as the 636

Took 3 days Boiler went in airing cupboard

Materials

Boiler
Flue
Nest
Maggy
Shock arrestor
Filling loop
4 lengths of 22mm
1 length of 15mm
2 lengths of 11/2 waste pipe

Plus odds and sods that you forget

Price was around 2.5k Mark
3 full days or did you have time to squeeze in one craniotomy?:D
 
I wish I was but unfortunately I'm not a £1k a day brain surgeon. And don't take this the wrong way but you seem to be a typical customer who believes everything takes 5 minutes. I'm not saying I know more than the 3 plumbers who have viewed the job, but I don't have to to know that somethings off. I wouldn't entertain a combi swap for £1500 10 years ago, never mind now.

You supplying the hive and associated pipework could knock around £300 off the bill but even considering that, it's still cheap. I'll say again, we're not trying to wind you up but most if not all plumbers on this forum have seen the results of cheap work. Once you've paid them you will likely never see them again and will end up paying again to put the work right.
You didn't actually answer my question earlier though. Have they asked for cash?

Craig deserves a lot of credit here for providing a courteous and helpful response rather than the ridicule/hostility from some others.

If the op has got three similar quotes from 3 gas safe plumbers it’s the industry that’s at fault here it the customer.
 
Wise words, quickest way to find a weakness in a system that’s been operating barely above atmospheric pressure for 20 years is to shove 1.5 bar in it.

Yeah and have water Soding through the ceilings from various places due to Rubbish soldering. Seen it before. Always advise a full repipe. Even the hot water pipe too.
 

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