Gas Heating Noise from Attic

emorr1975

Hi
We have a new system installed and every morning when teh heating comes on there is a large rush of water falling from the attic and then the main water tank starts to fill... Its so loud that it wakes the house up.. Any reason for the water noise ?
Ed

emorr1975

bumping up

jimjimt

Hello,

Is their one or two tanks in the attic one big and one small.

The big tank should not be affected by the heating in any way.

Have you oil, gas, solid fuel heating or perhaps combined ?

Have you a pressurized hot and cold water system ?

emorr1975

Hi

Its 2 Tanks in the attic, I used to have oil but now have gas installed.
I'm going to go in the attic in the morning and see exactly whats happening .

Ed

emorr1975

Hi, sods law its not repeated itself over the last few days.. I went up the loft and nothing happened but when in the airing cupboard there is some water moving in the pipes when the heating is switched on which again is only breif but loud enough to wake us up... The new thing is teh when teh heating is on there is liek a constant drippung noise coming from the hot water tank which is loud enough to hear from the bedrooms but as soon as the heating goes off it stops... any ideas on this ?

jimjimt

If you got a new gas boiler installed, is the system now pressurized or is the small tank still in use ?

Most gas boilers are now pressurized and do not need a small tank.

Have you notice the noise coming on when you press the hot water switch or the radiator switch ?

emorr1975

Hi not too sure but the tank that used to feed the oild boiler is now gone and a small red metal one is now in the loft but I dont think that is a water tank is it ,,,,, I dont have seperate switches on the boiler for hot water/heating.. There is a maunal switch in the airing cupboard if I want hot water only but generally I have hot water and heating when I switch teh boiler on

boiler break downs

emorr1975 wrote: »

Hi not too sure but the tank that used to feed the oild boiler is now gone and a small red metal one is now in the loft but I dont think that is a water tank is it ,,,,, I dont have seperate switches on the boiler for hot water/heating.. There is a maunal switch in the airing cupboard if I want hot water only but generally I have hot water and heating when I switch teh boiler on

what make of boiler is it.
do you have an automatic filling loop.
is there water coming out of the prv .

jimjimt

Ok the red tank in attic seems like a secondary pressure/expansion vessel for your new gas boiler. The small tank should not be use unless you have another heat source back boiler/stove ?

You need to check with your installer and ask is the small tank in the attic is no longer in use. Is the red vessel for the new gas boiler. Most likely this is the setup but you should confirm.

The switch in the hot press for your hot water does it control the gas boiler to heat your hot water or the immersion heater ?

Do you have anywhere switches to separate your radiators from your hot water when you turn on your gas boiler?

Do you have any zone/motorized valves ?

shane0007

I'm wondering is it a so-called semi-sealed system fed off the cwst. Non-return valve failure. Air in system. Boiler fires, pump on, air moves back though cwst & alters level of cwst & thus moves the float valve to allow it to temporary fill.

jimjimt

I'm wondering is it a so-called semi-sealed system fed off the cwst. Non-return valve failure. Air in system. Boiler fires, pump on, air moves back though cwst & alters level of cwst & thus moves the float valve to allow it to temporary fill.

I was thinking along those lines. I do not think a semi sealed system would allow the gas boiler to fire. Unless it is open vented or their is a setting on the gas boiler to allow it to fire on a lower pressure.
If someone was to install like that it is normally to hide a leak.

shane0007

It would fire if the house is a two storey as most gas boilers will fire at 0.5 bar or sometimes just below.
It would also not be usual for some unscrupulous installers to link out the pressure switch!