Correct coldwater storage tanks size

[Connor Williams]

Hello guys, I am renewing my storage tank in the loft and the loft hatch is only big enough to fit a tank that is 27x20x20" in size.

I am intending to fit two of these tanks and join them togethar which would give me a 50 gallon tank (227 litres).

Will this size be big enough to feed the hot & cold taps in my bathroom, I have an instant electric shower so the bath is the biggest draw off the tank.

Any guidance on size etc would be greatly appreciated, many thanks.

All the best,
Connor

 

[rocketmanbkk]

It should be but as a mumimum guide for an indirect system approx 220lts CWSC should be fitted.

 

[TGor]

Agree should be OK .. just make sure that you join them so that there is equal draw off from each to avoid stagnation problems

 

[rocketmanbkk]

may also be best to join with 28mm pipe and also at opposite ends of cwsc to avoid stagnation. (blimey, I am taking things in!).

 

[Resolute]

Have the fill into one tank and the draw offs from the other - this will ensure the water doesn't stagnate!

 

[WHPES]

You can get long "coffin" tanks which will fit through loft hatches.

 

[rocketmanbkk]

As I said,

Have the fill into one tank and the draw offs from the other - this will ensure the water doesn't stagnate!

 

[Osp]

You can get long skinny 50gal tanks designed to fit through loft openings - Google "coffin tank". These work fine if you have the headroom above the loft hatch as you slide them in.

If you go for two tanks, stagnation can be a problem as TGor says. If you connect them in parallel the water has a habit of taking the easy route and flowing from one tank, leaving the other to become a wildlife habitat. Assuming you don't have unusually high demand I would connect the two tanks in series so all of the water flows through both tanks. Saves on a float operated valve as well.

Either way, if your new arrangement covers more floor area than the old one, don't forget to remove the loft insulation from under the base of the tank.

Best of luck!

 

[Osp]

Ah - sorry for duplication chaps - got called away before posting reply.

 

[Connor Williams]

Thats great thanks for the help, much appreciated, I will also check out these coffin tanks all the best Connor

 

[Resolute]

As I said,

You did, just tried to make it simpler to understand.

 

[scotty plumber]

Also make sure you fit a 22mm ballvalve and not a 15mm so that the tank fills up just as quick as the water draw's off to avoid air-lock!