Dropping pipes through stud walls

[James05]

First time on the forum and looking for a bit of advice. We have converted a large workshop area attached to our house and looking to plumb in the central heating. I'm planning to put in a flow and return system with 22mm main pipe and 15mm Spurs to the radiators. The main pipes will run above the suspended ceiling (concrete floors) and I,m looking to drop the Spurs down through the stud walls to the radiators which will be a drop of about 7' . My question is will the flow in to the radiators be ok with the main pipes being 7' above as usually the main pipes run below using convection to get the hot water to rise in to the radiator. Secondly as the pipe work will be up high should I put some bleed valves in to avoid air lock problems?
Hope someone out there can help.... Many thanks
James

 

[ShaunCorbs]

Will be fine, I would be more worried about the boarders putting screws through them,

And yes I would fit some flamco auto air vents with full bore lever valves just below them

 

[Best]

Run the main pipes above the ceiling with a very slight and consistent rise towards very point where you are putting tee offs for any bleeding points.
You might only need manual vents, especially if it is a sealed heating system. Once the air gets removed on initial fill up and running, it often will keep working

 

[Howsie]

Depends on what head your pump can accommodate.

 

[James05]

Thanks guys for the advice it's really appreciated.

 

[plumben]

As above really just put air vents at highest point in accessible location and the rest should be fine, don't forget to either use drain off Lock shield valve or put a drain off at the lowest point on the pipework

 

[Scott_D]

How many new radiators and how many existing

 

[James05]

There are going to be 6 new radiators and this will be on a separate zoned circuit going in to a new boiler that you'll be glad to hear I'm not attempting to put in myself. The plumber will be doing this. I'm going to put in the radiators to save a bit of money.

 

[ShaunCorbs]

There are going to be 6 new radiators and this will be on a separate zoned circuit going in to a new boiler that you'll be glad to hear I'm not attempting to put in myself. The plumber will be doing this. I'm going to put in the radiators to save a bit of money.

if onto stud walls make sure there are timber where your fixing the brackets