Header Tank; Do I Really need a 25 Gallon ?

LenWoods

Hi all,
I have a three bedroom semi detached house,
'm looking to gain more space inside the attic space;

The existing header tank is a 60 Gallon tank situated right in the centre of the Apex which I plan to have moved over close to the outter wall to create a larger floor space in the attic.

If the tank was smaller then I could fit it inside the trusses closer towards the front of the house which would create even further floor space where its possible to stand up straight.

I have a few questions and I'm open to education

The existing header tank is a 60 Gallon,
The house has two toilets which I understand both feed from the header tank,

The sink upstairs also feeds cold water from the header tank,

Theres also a small copper tank.

Theres a Triton T90 electric shower upstairs which looks to be feeding from the header tank would this be correct?

All that said now;
Could I fit a 25 Gallon tank instead of the existing 40 Gallon tank;

Also could the electric shower and upstairs sink be tee'd in to the main water supply which feeds in to the header tank;
Resulting then in the contents of the header tank only feeding the hot water tank and the toilets,

Thanks for all input

Dtp1979

LenWoods wrote: »

Hi all,
I have a three bedroom semi detached house,
'm looking to gain more space inside the attic space;

The existing header tank is a 60 Gallon tank situated right in the centre of the Apex which I plan to have moved over close to the outter wall to create a larger floor space in the attic.

If the tank was smaller then I could fit it inside the trusses closer towards the front of the house which would create even further floor space where its possible to stand up straight.

I have a few questions and I'm open to education

The existing header tank is a 60 Gallon,
The house has two toilets which I understand both feed from the header tank,

The sink upstairs also feeds cold water from the header tank,

Theres also a small copper tank.

Theres a Triton T90 electric shower upstairs which looks to be feeding from the header tank would this be correct?

All that said now;
Could I fit a 25 Gallon tank instead of the existing 40 Gallon tank;

Also could the electric shower and upstairs sink be tee'd in to the main water supply which feeds in to the header tank;
Resulting then in the contents of the header tank only feeding the hot water tank and the toilets,

Thanks for all input

You’ll need proper supports for a start. I wouldn’t go below 60 gallon. You can get coffin shaped tanks that would fit between the rafters, assuming the correct base is built.
And no. You cannot use mains water to feed a gravity fed shower like triton t90

LenWoods

Dtp1979 wrote: »

You’ll need proper supports for a start. I wouldn’t go below 60 gallon. You can get coffin shaped tanks that would fit between the rafters, assuming the correct base is built.
And no. You cannot use mains water to feed a gravity fed shower like triton t90

Thanks for your response,
I'll get the tank ordered in preparation;
Woulld this tank be a good alternative to put in;
https://www.tanks.ie/water-tanks/water-storage-tanks/attic-water-tanks/s60-attic-water-tank.html

The optional extra drop list there has a lid, drip tray, insulation and fittings which I will add when purchasing,

my father will be fitting it for me; he offered to relocate the tank to make the most of the attic space,
He's used to be a lecturer in college for electricians and is a qualified plumber I used to spend summer holidays going on jobs with him plumbing and wiring; he also fitted all my radiators integrating pipes to exit from the walls instead of straight up from the floor,
As saw here: https://www.fordownersclub.com/forums/topic/80864-living-room-project/#comments

He's retired a few years now and lives almost 300km away from me,
We don't see each other much just get together twice a year now to work on somthing in the house,
I'd like to have the tank and parts purchased before I arrange for him to visit and fit because I don't want him spending on it which would be the case if we required somthing while doing the job and I don't want making do with the existing tank neither as a coffin tank would fit neater as advised.

Long background story there but felt in needed to be said and thanks for your response

John.G

If you are not too worried about a mains outage then as long as tke makeup (ball cock) can make up 25/30 LPM then all you require is break tank of say 100 litres/25 galls

dathi

John.G wrote: »

If you are not too worried about a mains outage then as long as tke makeup (ball cock) can make up 25/30 LPM then all you require is break tank of say 100 litres/25 galls

taken from the building regulations TGDs part G

1.6 The cold water storage cistern should have an
actual capacity of not less than 212 litres in the case
of a dwelling containing up to three bedrooms and an
actual capacity of not less than 340 litres in the case
of a dwelling containing four or more bedrooms.

John.G

I have a 4 b/room with a 150 litre CWST, I may be mistaken but I am fairly sure that I saw a house a few years ago with whole house pumping and the tank was only - 75 litres and it didn't have any other CWST but obviously the bigger the storage capacity, the better.