Removing backboiler and adding combi with no experience!

[Deanow24]

Hi,

I have bought a house with an old baxi bermuda back boiler system. I need to instal a combi boiler and remove the old system. I am going to buy a worcester/bosch boiler because i hear from plumbers ive talked to that they are the best to have. My current system has a tank in the loft and i have traced all of the pipework and understand what it all does.
I hadnt considered the diferent pipe diameters however and now im a little unsure.
-What are the regulations regarding pipe diameters?
-Do the bigger pipe diameters need to be a certain distance from the boiler before you step them down to 15mm?
-the current heating system heats upstairs first and then the rads downstairs. Can my combi boiler start from downstairs and go up instead?

Also, what is this power-flush i hear about? Can I tell if i really need to clear my system out without doing it, or am i just being lazy?

Hope someone can help! There are a lot of questions there!

Deano.

 

[petit_pablo]

One piece of advice.

Get an RGI in.

 

[45yearsagasman]

One piece of advice.

Get an RGI in.

End of!!!

 

[Andygasman2010]

One piece of advice.

Get an RGI in.

Good advice!

Speaking from experience, if you do it yourself you're probably going to end up spending far more money/time than you need to. You've asked some fairly basic questions so it sounds like a project like this would be too much to take on.

Not to mention the fact that you can't do ANY gas work or install the boiler without being qualified.

Best thing to do would be to get 2 or 3 quotes from local RGIs (get someone recomended by a friend if possible) They'll take about two days depending on what you get done but believe me it's worth it.

Imagine you rip out your old system and come across something your not sure about, something unexpected, there's not much you could do AND you'd have no heating or hot water!

 

[muggles]

As above, get an RGI in.

Having said that, why a combi? Are you sure this is best for your house? Combi boilers are most certainly NOT the answer to every heating/hot water solution. Worcester-Bosch are generally good boilers but there are plenty of people on here who will tell you there are better boilers out there.

 

[Rob]

Wind up IMO

 

[ollski]

-the current heating system heats upstairs first and then the rads downstairs. Can my combi boiler start from downstairs and go up instead?

 

[onlyfitidealboilers]

windup