Over-sized CWSC?

[WaterTight]

Old CWSC. Measured it and used online calculator which suggested it holds 85 gallons.

It feeds a cylinder for bath/basin/kitchen hot and bath/basin cold.

It's in a space it only just fits in and needs replacing. Frankly I'd suspect a 50 gallon would do but should I play it safe and use a 70 gallon coffin? It would mean re-locating f+e whereas a 50 gallon would fit nicely.

Current tank is just plonked on joists unsupported and has developed hairline crack. I wouldn't be suprised if it wasn't chosen due to calculated usage.

 

[WaterTight]

That is unless there are 70 gall tanks that aren't coffin shaped or overly long. Even the 50 gallon cube ones now seem to have supporting frames.

 

[Mike Jackson]

50 gallon will be fine unless the cold mains is very poor.

 

[johnnyplumb]

what's the hw cylinder capacity ?, if it's say 25g, you could fit a 25g feed cistern and change the cold to the bathroom to mains pressure.

 

[secret squirrel]

Personally, I run a 50 gallon in my house which powers 2 showers via a 3 bar pump and two bathrooms hot and cold the hot in a cloakroom and a utility room and kitchen. Plenty.....

 

[justlead1]

The cistern you describe was the standard under water bye laws not so long ago. Even one bed flats in the South East had large cisterns (100 gallon) Just the kitchen sink was feed from the main supply. Now with a change to water regs. this is no longer a requirement. But the logic being a large amount of storage then gravity feed provides water during peck demands without effecting performance. Residue pressure on company mains is maintained, which supports the fire service etc. Cistern feed supplies protect main contamination from back siphage and alike. They also provided a design where plumbers used skills to install greater than 1/2" pipe. It was a period when plumbing was good money. Alas "The times they are a changing" (Bob was right). Good Luck

 

[WaterTight]

what's the hw cylinder capacity ?, if it's say 25g, you could fit a 25g feed cistern and change the cold to the bathroom to mains pressure.

I won't be getting into that, but food for thought!

Alas "The times they are a changing" (Bob was right). Good Luck

He often was. And thanks!

 

[Bernie2]

It was usual to fit 50 gallon if supplying hot alone and 70 gallon if hot and cold.

 

[johnnyplumb]

Originally Posted by johnnyplumb
what's the hw cylinder capacity ?, if it's say 25g, you could fit a 25g feed cistern and change the cold to the bathroom to mains pressure.



i wont be getting into that, but food for thought!

fair enough, consider these plus points though,

1- customer would have drinking water at cold taps in bathroom

2- wc cistern is likely to fill up quicker than before.

3- a 25g feed cistern, lid & jacket is cheaper than a 50g, so if i was pricing against you, i'd have say a £50 head start.

if it was me, i'd be giving the customer both choices and let them decide what they want.