shower feed tank problem

[norwoodt]

The mixer shower in question, has a twin pump located in a closet, from a gravity fed system.

As it is one side of the house, it has a seperate tank which solely feeds the cold side of the shower.

Hot supply is just picked up via the cylinder.

The problem we have is the tank (feeding the cold) is over flowing, and im positive it is back filling? (have tried and tested new ball valve)

Is it a problem with the valve or the pump?

any comments advise welcome

Many thanks in advance
cheers...

 

[seco services]

isolate the hot feed to your pump from the cylinder.

see if it stops it filling and your cylinder supply tank starts to fill.

 

[JayJay1978]

Is the main cold water tank higher up than the tank in question?

 

[bengasman]

Something odd here.
Cold side is fed from tank.
Hot side is fed from cylinder, which is fed from (presumably) same tank.
You can pump that round as fast as you want in any combination of hot and cold volumes, the tank will not flow over.
Water is being added, from somewhere, probably the mains.
Usual suspects:
Float valve.
Mains fed mixer.
Other tank over filling and spilling into this tank.

 

[JayJay1978]

If the hot was from the main CWS supplying the cylinder, and the cold was from a seperate 25 litre tank which was lower than the main CWS and the mixer was passing, wouldn't that cause the water level in the secondry tank to rise?

I know thats the wrong way to plumb it through.

 

[seco services]

If the hot was from the main CWS supplying the cylinder, and the cold was from a seperate 25 litre tank which was lower than the main CWS and the mixer was passing, wouldn't that cause the water level in the secondry tank to rise?

I know thats the wrong way to plumb it through.

yes if the non return in the cold side of the shower was stuck open.

 

[Razor900]

If the hot was from the main CWS supplying the cylinder, and the cold was from a seperate 25 litre tank which was lower than the main CWS and the mixer was passing, wouldn't that cause the water level in the secondry tank to rise?

I know thats the wrong way to plumb it through.

yes if the non return in the cold side of the shower was stuck open.

Probably not even fitted in an effort to boost flow

 

[kevplumb]

wheres the heating header tank hight wise

 

[norwoodt]

many thanks for all your responses.

There is a seperate tank for the cold side of the shower, and the other tank feeding the the hot and the cylinder is located the other side of the house.

not sure of position of header tank, ill check and get back tommorow.

Im positive the hot water must be passing the shower valve to the cold side, going back to the pump and up to tank???

what d'ya think??? is it posible???

thanks again

 

[seco services]

what d'ya think??? is it posible???

thanks again

already been over what to do

 

[bengasman]

So 1 cylinder and 2 tanks?
If that is correct, adjust the floatvalve in the not overflowing tank down about an inch, and see if that makes any difference.

 

[seco services]

So 1 cylinder and 2 tanks?
If that is correct, adjust the floatvalve in the not overflowing tank down about an inch, and see if that makes any difference.

wheres that taking us ?

 

[bengasman]

So 1 cylinder and 2 tanks?
If that is correct, adjust the floatvalve in the not overflowing tank down about an inch, and see if that makes any difference.

wheres that taking us ?

2 minute job eliminates the possibility of the 2 tanks being connected with the other one being slightly higher, thereby causing the first one to overflow.
Bit of a long shot, but no cost and very little effort.

 

[seco services]

2 minute job eliminates the possibility of the 2 tanks being connected with the other one being slightly higher, thereby causing the first one to overflow.
Bit of a long shot, but no cost and very little effort.

still worth ago.

 

[norwoodt]

Sorry for not responding.

Thank you for all your advice,

OK I have had a look in the other loft side (to locate the other, tanks) there is obviously the main water tank and a small feader tank.

Now these two tanks are built on a platform (about 1/2 a metre high), and the other tank, at the other side of house, feeding the cold for shower, metioned yesterday is not. and half the size.

Because it is that much higher, i havnt adjuted the float valve.

But. I have, isolated the hot feed to the shower pump, and so far no overflowing problem!

This new tank and pump have only been in 6yrs, its only recently we have noticed the overflow problem.

look forward to any response on this...cheers...