Any plumbers in this morning? 2 quick questions if I may?

I have an existing central heating system that runs around my house, wall mounted boiler, hot water cylinder and a header tank in the loft above the bathroom.

I am currently converting my loft, into a bedroom, ensuite and walk in wardrobe.

I'd like to extend the central heating upstairs, but this means the highest rad will be several feet above the header tank.

So do I replace the header tank with an expansion tank and make a pressurised system, or relocate the header tanks into the new loft space above the bedroom?

And I think from looking at the way the other radiators are connected they are connected in parallel rather than in series (if they are the right terms?) on a single loop system. If I plumb the three new rads in upstairs do I put a loop at the end of the last one. If that makes sense? i.e hot feed in, t to the rad, continue the main pipe past the last rad, then t in the return from the rad and back to the boiler?

This image seems to show the last rad is in series, rather than in parallel?


Cheers

Mike

looking at the pic (I am not a plumber) all you need to do is from the last rad in your house take a pipe from the feed and return to make it look like the 1 upstairs (in pic) the make the last rad in your new coversion like the 1 down stairs in the pic.

As I say this is just from looking at the pic you provided I'm sure some one with experiance wil be along to clear it up

YQUSTA

get a combi and do away with the tanks

quote:

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Originally posted by Flamez
get a combi and do away with the tanks

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As above and the last rad in the circuit will look like it's in series as there is nowhere for it to parrallel to!!

quote:

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Originally posted by will121

quote:

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Originally posted by Flamez
get a combi and do away with the tanks

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this would also solve the same potential problem you are going to have with the hot water supply to the new ensuite if the taps are below he hot water cylinder header tank but as always this is going to cost money. coverting the heating to a sealed system with a expansion cylinder is quite straight forward. also on the last radiator you do not need to link the flow and return pipework, only problem is if you have a fully pumped system with TRV's on all radiators should have a pressure differential valve which willl let water still flow round the boiler if all the TRV's shut

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Thanks guys.

Converting to a combi looks like big bucks on top of the cost of the loft conversion.

We've only got 2 TRV's at the minute and they are on the bedroom rads!

Now then, the question is, I presumably already have a "last radiator" on the current system, so all three of my new ones should be bypassed?

Cheers

Mike

Instead of a new boiler...

How about fitting a Direct Hot water cylinder.... (hot water on demand at mains water pressure basically)...


That on a pressurised system.... FTW!