roof tank overflowing

[lancenotalot]

Hi there,
I am helping my niece and her boyfriend refit their bathroom.We totally gutted it and capped of the taps with iso valves(temp while tiling).There was a shower,no electrics so I assume it was fed from the hot water system,anyway they removed this and capped it off as they want a power shower direct from the rising main.When they refilled the system it overflowed in the roof.A plummer came out and sorted it out but was very vague as to the cause,can anyone tell me what may have caused this please incase of any further occurances,it didnt take him long to sort out,perhaps it was easy money??

 

[tomy]

Probably a bit of muck in the ball valve which caused the ball valve not to close off properly which he has now cleaned out

 

[lancenotalot]

Hi,it was not filling from the ball valve,the water was filling from the bottom,I checked the ball valve and there was no flow coming in from it.

 

[tincup]

Hi

If it was going into the tank from the bottom why did it not go out the overflow.

 

[relief123]

Hi there,
as they want a power shower direct from the rising main.??

Power shower on rising main-----Are you sure????

Pumping mains water is a big no no... water regs..

 

[Nige F]

How much did you pay him

 

[chr15]

After they finished the work they didn't link the hot and cold pipes to the old shower together did they? Silly question I know but I seen this happen -or something similar on a job before.