Works to the Cold Water Services on the Estate
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BAM Estate has started out on a programme to introduce new cold water
supplies to all flats. These are to be run in heavily insulated pipe work up
the exterior of the buildings. Valved connections will be fitted on the
exterior of each flat approximately opposite the existing supply positions
within the flat. If the leaseholder requests, at the time of installation,
pipework can be run through the wall to leave a valved connection within the
flat. Once that pipework is tested and left live, the leaseholder can then
make their own connection to the new supply when it suits them.
There are a number of reasons why it is necessary for these works to be
carried out: -
• The mains water risers from the street via each flat and up to the roof,
and the cold water down services from the roof tanks, are all mainly in lead
• Lead pipework is causing problems with faulty stopcocks and leaks in the
flats with all the cost implications that replacement and redecoration
• Lead pipework will in places be collapsing, reducing the pressure at peak
demand times. With the reduced mains pressure, and increased use of the
mains by the flats, the mains supply to the hot water service tanks on the
roofs is barely sufficient. This is resulting in reduced system pressure at
peak demand and so the introduction of air into the hot water service
systems, resulting in reduced hot water service temperatures.
• The existing lead pipework incoming main to each block is 28 mm. Current
usage of water per head is higher than the original design standard. The
optimum to allow each flat to run its own heating and hot water system would
be an incoming main of 35 mm. and the works we will be carrying out will
provide a larger supply.
• Because the lead pipework is run inside the flats the mains water is being
warmed as it passes through. Tests have shown temperatures of close to and
above 20c at the roof tanks where the incoming mains at the road is 13c or
less. This is can lead to high storage temperatures in the cold water tanks
which can lead to high bacteria readings. New external mains and down service supplies
properly lagged would resolve this problem.
• The lead pipework is as old as the buildings i.e. over 100 years old, and
the incidence of deterioration can only increase.
• Some residents have expressed a preference that their drinking water
should not be run through lead pipework because of their fears of lead
• The introduction of alternative cold water supplies is a major project,
and is therefore being programmed for implementation over a period of years.
Whilst BAM Estate is not a ‘water supplier’ as specified in the Water Supply (Water Quality) Regulations
2000 it takes the view that it should conform with acknowledged best
As this is a long term programme we will contact individual leaseholders
closer to the time when it is proposed to carry out works affecting their
flats, and will enquire as to whether they wish to take the opportunity to
have pipework run through the wall to leave a valve to which they can, at a
later date, make their own connection. Leaseholders who are proposing
carrying out alterations in their flats that affect their plumbing are being
advised of how the programme may affect them.
Whilst the Estate will make no charge for bringing the valved connection
into the flat, any works required to fixtures, finishes or decorations etc.
would be down to the leaseholder.
The subsequent connection to the new supply valve, whether it is internal or
external, is for the leaseholder to arrange at their own cost.