Hi,
My water supply is from a well , straight to the house via a UV
filter. The well is about a quarter of a mile up the hill so plenty of
pressure. This will be our 1st summer here and I don't know if the
well will always have sufficient water so I have got two 360 gallon
tanks (plastic) and a pump to provide a backup supply.
I cannot get inside the tanks as they are bottle-shaped and about 7ft
high with only a 10 inch screw-on vent cap.
One is fitted with a ballcock. I need to connect the two tanks
together at/near the base so that they both fill and empty at the same
time and thought of using screw-in tank connectors - but they require
access to the inside which I haven't got.
I spotted a cylinder connector at
http://www.bes.ltd.uk/nav_graf/frames_cat.htm

under 'pluming/cylinder Imersion heaters and flanges' which appear to
be fitted without needing access to the inside. How is this achieved -
if it works then it will solve my problem.
Anyone used this type of fitting?

tia,
Ken

wrote:
Hi,
My water supply is from a well , straight to the house via a UV
filter. The well is about a quarter of a mile up the hill so
plenty of pressure. This will be our 1st summer here and I don't
know if the well will always have sufficient water so I have got
two 360 gallon tanks (plastic) and a pump to provide a backup
supply.
I cannot get inside the tanks as they are bottle-shaped and about
7ft high with only a 10 inch screw-on vent cap.
One is fitted with a ballcock. I need to connect the two tanks
together at/near the base so that they both fill and empty at the
same time and thought of using screw-in tank connectors - but
they require access to the inside which I haven't got.
I spotted a cylinder connector at
http://www.bes.ltd.uk/nav_graf/frames_cat.htm

under 'pluming/cylinder Imersion heaters and flanges' which
appear to be fitted without needing access to the inside. How is
this achieved - if it works then it will solve my problem.
Anyone used this type of fitting?

7ft height might mean too much pressure for a flange connector which is
bearing upon a plastic wall. But I know nothing, as Manuel used to say, and
hopefully one of our expert plumbists will be along soon. Good luck.

Ken


Essex flanges do exactly this job, but are aimed at copper h/w cylinders
AFAIK.
Fitted one recently to our cylinder for a shower take off.
Would be worth investigating if these are suitable for plastic tanks.
They install from outside only and seal on rubber washers inside and out.
My reservation would be the stiffness of the tank wall when tightening.

Phil

wrote in message
...
Hi,
My water supply is from a well , straight to the house via a UV
filter. The well is about a quarter of a mile up the hill so plenty of
pressure. This will be our 1st summer here and I don't know if the
well will always have sufficient water so I have got two 360 gallon
tanks (plastic) and a pump to provide a backup supply.
I cannot get inside the tanks as they are bottle-shaped and about 7ft
high with only a 10 inch screw-on vent cap.

They sound like sewage system vessels. Are you sure that the plastic is one
that is suitable for water supplies? You don't want plasticiser in your
drink water.

One is fitted with a ballcock. I need to connect the two tanks
together at/near the base so that they both fill and empty at the same
time and thought of using screw-in tank connectors - but they require
access to the inside which I haven't got.
I spotted a cylinder connector at
http://www.bes.ltd.uk/nav_graf/frames_cat.htm

under 'pluming/cylinder Imersion heaters and flanges' which appear to
be fitted without needing access to the inside. How is this achieved -
if it works then it will solve my problem.

It doesn't look possible from the illustration. It appears to have an
internal flange that is significantly larger than the hole required.
However, at the price, you could afford to buy one to find out. That would
also allow you to check whether the thread is long enough for the wall of
your vessels; the ones shown are designed for use with copper cylinders.

BTW, you will also need an insect proof air vent in each vessel, to allow
air to enter and leave as the water level changes.

Colin Bignell

wrote in message
...
Hi,
My water supply is from a well , straight to the house via a UV
filter. The well is about a quarter of a mile up the hill so plenty of
pressure. This will be our 1st summer here and I don't know if the
well will always have sufficient water so I have got two 360 gallon
tanks (plastic) and a pump to provide a backup supply.
I cannot get inside the tanks as they are bottle-shaped and about 7ft
high with only a 10 inch screw-on vent cap.
One is fitted with a ballcock. I need to connect the two tanks
together at/near the base so that they both fill and empty at the same
time and thought of using screw-in tank connectors - but they require
access to the inside which I haven't got.
I spotted a cylinder connector at
http://www.bes.ltd.uk/nav_graf/frames_cat.htm

under 'pluming/cylinder Imersion heaters and flanges' which appear to
be fitted without needing access to the inside. How is this achieved -
if it works then it will solve my problem.
Anyone used this type of fitting?

tia,
Ken

I think you are considering a hi tech solution for a low tech problem.

Why not set up a permanent syphon. No flanges at all then!

5 Metres of garden hose weighted at the ends.

With your proposal.. failure of (or the need to rapair) one flange would
result in losing all the water.

Once the syphon is set up water will flow back and forth all the time. IMHO
no chance of an airlock.

David