Boiler manual States 22mm flow and return, no mention of using 28mm.
So....where has the 28mm come from?
http://www.worcester-bosch.co.uk/ca...ystem--manufactured-from-jan-2013.pdf[/QUOTE]
It came from BG quote saying my 22mm was no good and needed to rip up all my floors and repipe from boiler to tank with 28mm. At a great cost of course
Well yes, I got that bit.
But why? I'm not a heating engineer, so is there something I'm missing?
What's the point in 28mm pipe work if the flow and return is 22mm?
BG want to upgrade pipework from 22mm to 28mm
- Thread starter Greycatlover
- Start date
Sponsored Links
Boiler manual States 22mm flow and return, no mention of using 28mm.
So....where has the 28mm come from?
http://www.worcester-bosch.co.uk/ca...ystem--manufactured-from-jan-2013.pdf[/QUOTE]
It came from BG quote saying my 22mm was no good and needed to rip up all my floors and repipe from boiler to tank with 28mm. At a great cost of course
Well yes, I got that bit.
But why? I'm not a heating engineer, so is there something I'm missing?
What's the point in 28mm pipe work if the flow and return is 22mm?
Some previous posters thought 28mm would be better but that 22mm would work.
I just need to way up the upheaval/cost of refit versus the benefit.
Thus far nothing has shown me that the upheaval is worth it.
It will work. But 28mm Will be better.
At 20 degree delta 22mm will take 27kW. At 11 degrees, it is only 15kW.
28mm is 45kW and 25kW respectively.
Perhaps the BG man is still working at 11 degrees.
At 20 degree delta 22mm will take 27kW. At 11 degrees, it is only 15kW.
28mm is 45kW and 25kW respectively.
Perhaps the BG man is still working at 11 degrees.
Sponsored Links
Yarp.
i thought u could get 40kw out of 22mm pipe
- Joined
- 19 Feb 2006
- Messages
- 31,315
- Reaction score
- 10,759
- Country
At what velocity?
1 m/s
I hope.
I hope
.I'm sure you've asked him that before in the CC!
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
