Hot Water Tank Feed

[McTavish]

I am about to move the water tanks in the loft in preparation for a loft conversion.
They are in the middle of the loft at the moment & I'm moving them to one end.

My question is about the cold water feed to the hot water tank.

At the moment my hot water tank is fed from the cold water storage tank.
The only purpose the cold water tank is serving is to feed the hot water tank & to vent it.
The reason for this is that the mains supply comes into the house & goes straight into the bathroom, it feeds the sink, bath & toilet then goes up into the loft where it runs to the other side of the loft & down thru the bedroom & into the kitchen.
A feed is taken from it to supply the cold water tank, the header tank & the shower.
Is it possible for me to remove the cold water tank altogether & feed the hot water tank from the mains supply, venting it to the header tank?
It would free up a good bit of space in the loft as it's not the biggest loft.

Any advise/suggestions would be appriciated.

Cheers

McTavish

 

[kirkgas]

i will take the bait, although i think this is a wind up, no you cant do that, if you connect the tank feed to the main it will simply run straight up the vent pipe and pour out, the cylinder must be gravity fed from a tank above it, you could change the tank for a mains fed unit this would free up all the space taken up by the bigger tank in the loft, but you need to get a G3 qualified plumber to inspect the site to confirm whether water pressure and flow is high enough to allow the unit to work properly

 

[PuraTherm]

No. You would need to change the tank to an unvented system for two reasons. First, if you leave the vent attached and connect the mains pressure the water will just come out of the vent. Second the copper cylinder used for vented systems usually cannot handle the mains pressure. If you are going to change over to mains pressure then there are many other considerations. To install an unvented system you would need a plumber or heating engineer who is G3 Unvented competent. Also if you go with the unvented cylinder then you would also need to change the shower to mains pressure otherwise you will get back pressure into the cold tank. This would not only be a nuisance but it would also be a major contravention of the water regulations. The unvented system is costly. My suggestion is to look into a combi conversion.

 

[McTavish]

Thanks for the replies folks.
Would it be possible to change the cold water tank for a smaller one?
Applogies in advance if thats as dumb as my first idea

 

[Gray0689]

Look mate get a plumber in he will be able to tell you what and more important what you can't have.
No offence but you don't sem to have a clue on the basic principles

 

[PuraTherm]

I agree with Gray0689. Best to hire a pro rather than do something that at best could damage your house or at worse hurt yourself.

 

[McTavish]

Thanks again for your responses.

I am planning to get a plumber in to do the work for me, I was just thinking about what options could be available for making best use of the space & came accross this forum & thought it would be worth asking a couple of questions but I think I've misinterpreted the forums function.


Cheers again

McTavish

 

[Plumbstar Tom]

Whilst we do want to help its not always possible

We will not fully know your set up but what you have suggested is dangerous

The option of unvented has been given to you to get rid of yourr storage tanks in the loft, you will need a plumber to quote appropriately for this though

But as a general rule of thumb if something is there it is there for a reason and if it is a certain size, then it is a certain size for a reason

We are all trying to help but we are concerned with your knowledge and think its best if you call someone in

IMHO

 

[stoker122]

Why are old threads popping up?

 

[PlumbBobBob]

because the person above you has dragged them up to promote their company