Cold water pressure tank

[Choochoo]

Hello everybody

We have one of these cold water pressure tanks which is fed by pump from an artesian well.

Does anyone know the normal working pressure in these ? Ours normally sits at 2 bar but drops to 1 bar before the pump kicks in, this results in a wide pressure variation in the pipes affecting the pressure from the chauffe d`eau. This effect can make taking a shower quite interesting, trying to guess where the water will end up from the shower head !

I thought these things had a rubber balloon inside but apparently just relies on pressurising the airspace at the top.

Any thoughts ? Thanks to all.

 

John & Sue

 

[Opel Fruit<P><BR>Opel Fruit, Dept. 53<P>]

2 things:

• Pump should be sized correctly - in terms of working pressure, head and flow rate.
• The tank pressure switch should be set correctly. Or the correct type if fixed.

The normal cut-out pressure set on the pressure switch is 3.8-4 bar. The switch has a hysterisis of about 0.8 bar, so the pressure inside you tank will drop to about 3 bar before the pump kicks in again, and should be able to maintain > 3 bar when you draw water from a reasonably large tap. Or shower!

Try and adjust your pressure switch to cut out at just under 4 bar. If this cannot be achieved (and the pump keeps running) the wrong pump has been fitted.

For comparison, the pump motor must be a minimum of 1HP ( = 1.07kW) rating for domestic supplies.