I have a flat on the top floors of a five story Victoria terrace in London. There are 2 other flats in the building. My kitchen and bathroom are on the fourth floor. A new boiler was fitted 6 months ago - its a Vokera Linea HE Combination boiler. There are no tanks or pumps. Water pressure is generally ok however at peak times it can cut out completely. Thames water have said that they have checked the pressure and that it is adequate.
Can anybody advise a solution to this problem ? Can a tank/pump be fitted to a combination boiler ? Would this have any effect if the supply in is failing ?
As long as you have the required space above (ie loft space) you could have your system altered to a LOW PRESSURE SEALED SYSTEM.
This is an alternative method of filling the system.
It would be from an independent make-up vessel or tank
mounted in a position at least 1-metre above the
highest point in the system and at least 5-metres
above the boiler.
The cold feed from the
make-up vessel or tank must be fitted with an
approved non-return valve and stopcock for isolation
The feed pipe should be connected
to the return pipe as close to the boiler as possible.
Unfortunately there is no loft space (mansard roof). However the boiler is on the fourth floor. Would it be possible to fit a tank on the top fifth floor). This would not be 5 meteres above the boiler.
Does a low pressure sealed system hold a buffer of water ? Can it be used for drinking water ?
THE PURPOSE OF THIS MAKE UP TANK IS TO PROVIDE A MECHANISM TO FILL THE HEATING SIDE OF THE SYSTEM ONLY!
AS YOUR BOILER IS DESIGNED TO TAKE MAINS PRESSURE COLD WATER AND HEAT IT INSTANTAINIOUSLY TO DELIVER HOT WATER TO TAPS, I DONT THINK AN ADDITIONAL SUPPLY FROM A SEPERATE COLD WATER STORAGE TANK IS AN OPTION WITH THIS TYPE OF BOILER.
IN THEORY, IF THE COLD WATER SUPPLY IS AT THE REQUIRED PRESSURE THE BOILER WILL OPERATE WETHER THAT SUPPLY IS MAINS DELIVERED OR STORED WATER TANK DELIVERED.
IT WOULD HAVE TO BE ONE OR THE OTHER (MAYBE IN COMBINATION???)
ONLY VOKERA CAN REASSURE YOU OF THE DO'S AND DONT'S.
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