Air lock

[Shiv5]

Hi everybody,


ive been having this problem for a while now. The pressure of the shower starts decreasing so much that there's hardly any water coming out. I've searched on the net and youtube and it sounds like something called a airlock. What I'd like to ask is how to resolves this permanently please?


I have a 3 bar pump and 114 litre cylinder tank.


kind regards


shiv

 

[Ermintrude]

A photograph of the pump and pipework will help

 

[gasmanrob]

More likely to be cavitation of the pump I'd say

 

[stevetheplumber]

probably draining the tank

 

[kay-jay]

3 bar is quite possibly creating a flow rate in excess of what the storage can cope with. pics would help.

also, do you find that after the flow stops if you leave it a bit it splutters a bit then returns to normal?

 

[PlumbBobBob]

i agree the tank is too small you really need at least 50 gallons of stored water not 25

 

[Shiv5]

Thanks for all your replies. Been a bit busy past f we days so didn't get a chance to put photos up earlier but have done so now.

Regards

Shiv

 

[Killy Bing]

Fire away....

 

[Mike Jackson]

I'll start the ball rolling then. Pump dragging air down vent, storage too small.

Any more takers.

 

[Killy Bing]

Wonder if that can be used for a whole house booster pump....

 

[Best]

That looks like a 50/70 gallon cwt, so fairly decent cold storage.
I would check the ballvalve on cwt isn't blocked & filling slowly.
Also - the ballvalve is directly above the cold feeds from bottom of tank & not ideal place for putting air into pipes to pump.
The work looks a mess & should be all repiped.

 

[turnpin]

Was there a pump previously? if so was it changed for this one ? I think it is to powerful for the amount of stored water you have ...regards Turnpinunk:

 

[Shiv5]

Was there a pump previously? if so was it changed for this one ? I think it is to powerful for the amount of stored water you have ...regards Turnpinunk:

hi

no there wasn't a pump there before

 

[Shiv5]

3 bar is quite possibly creating a flow rate in excess of what the storage can cope with. pics would help.

also, do you find that after the flow stops if you leave it a bit it splutters a bit then returns to normal?

Hi

yeh I do find it splutters a bit and returns to normal.

 

[AtlasGas]

Your taking your hot water from the wrong place causing air to be pulled down the vent, you need a Surrey flange installing in the side of the cylinder.