Airlock - Hor water tap

Jimbo94

Any!!!65279; help?

!!!65279; Open hot water tap, water comes at normal pressure, water than makes splurting noise, than after 30 seconds only a trickle of water comes out. Same happens to all hot water taps throughout the house.

- Cold water tap working fine

- Central heating working fine

!!!65279; - Water from the hot water tap is hot but as above paragraph.

Airlock? So pipes need to!!!65279; !!!65279;‘fart’ to let the air out? Any tips on how to achieve this? I have not got mixer taps I have got pillar taps.

Jimbo94

Sorry about the random numbers in my post, I copied and pasted my question from another website I use and the numbers appeared automatically, and can!!!8217;t seem to edit.

Alex1983

How's your hot water supplied? Combi boiler, unvented cyclinder or open vented cyclinder?

Jimbo94

Hi Alex.

I have got a back boiler and a tank which stores the hot water.

Alex1983

Has the cold header tank ball valve stuck shut? Check there's water in the tank.

Jimbo94

The valve is not shut.

There is water in the tank because I could hear it filling up when I put the heating on, still get hot water through the tap but it only lasts 30 seconds and splutters and than stops all together

Alex1983

The heating and the hot water are two separate units, there is two tanks a small expansion tank for the heating and a big cold feed tank that fills the hot water cyclinder.

Have you checked the tank or just what you can hear.

Jimbo94

What usually happens is I heat the water for 1 hour in the morning and that fills up the tank enough for a shower and other things. The only difference being today is the hot water spurts out for 30 seconds and than stops. In terms of is the tank actually full I am assuming it is because 1 hour is usually enough to heat water for the day.

I am not sure how to actually check by looking at it whether it is full !!!55358;!!!56596;

giraffe69

We've just had exactly that except the hot water only slowed to a trickle (an hour to fill a bath!). We were able to use the kitchen mixer tap to clear it. If you haven't got a mixer tap a length of hose from cold to hot might work.

Jimbo94

Thankyou Giraffe,

Will have ago with the hosepipe later, to confirm i will attach a hosepipe to the hot water tap and then the cold water tap, and turn the hot water tap on first? Shall I leave the taps running for around 15 secs?

molerat

Jimbo94 wrote: »

The valve is not shut.

There is water in the tank because I could hear it filling up when I put the heating on, still get hot water through the tap but it only lasts 30 seconds and splutters and than stops all together

That certainly sounds like something is wrong, there should not be any "filling" when the heating is turned on. If you have a hot water cylinder you will also have a cold tank or a small cold reservoir on top of the cylinder. If this is not filling properly due to the ball valve being stuck and trickle filling it could well cause the problem.