Poor hot water pressure. Cant figure it out.

The pipe coming off the top of the immersion tank is 30cm long before it bends up to go vertical. The vertical pipe up to the roof is roughly 140cm. when it enters the roof it tees off. A pipe runs horizontally for 85cm then vertical for 60cm where it bends over into the water tank. The other pipe off the tee runs horizontally for 60cm then it dissapears behind the tank. Cant see where it goes from there as its too dark!!

any of that makes sense??
 
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A pipe runs horizontally for 85cm then vertical for 60cm where it bends over into the water tank.
Click to expand...

1 cheak that where it bends over the tank it isnt submerged in the water in the tank

2 where it runs horizontaly try to prop it up so it runs more vertically up towards the tank so the air can escape out of the vent, may be that its drooping so air cant escape and causing air lock
 
the horizontal pipe leading to the vent, can you lift that slightly to give a slight incline to the vent rather than the horizontal being lower at the vent end.
 
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seco services said:
the horizontal pipe leading to the vent, can you lift that slightly to give a slight incline to the vent rather than the horizontal being lower at the vent end.
Click to expand...

Will have a look in the morning when its lighter.

Thanks for everyones help so far. Much appreciated.

Will respond a.s.a.p

;)
 
right I have managed to have another butchers in the loft. Where the pipe comes up from the immersion tank and into the roof, at some point someone has fitted a grey plastic push fit coupler. A couple of inches above the coupler is the tee piece. The pipe I couldnt see that dissapeared behind the roof tank does not do anything. It has an isolation valve on the end of the pipe that is turned off. The length of this pipe is about a metre long and its horizontal. No idea what this pipe was doin or what it was feeding.

The pipe off the other side of the tee is the pipe that runs down to the bathroom/kitchen taps.
 
Having looked at a picture of 2 storey house hot water system, the hot water pipe tees of the top of the immersion tank and goes down to feed any taps as the immersion is fitted on the first floor. Where as our pipe goes up 6 foot in the roof then comes back down again as the immersion tank is located on the ground floor as its a bungalow.
 
Can't really imagine the pipework layout in your loft/roof space.

Can you post a pic(s) of the pipework in the roof?
 
The hw output union on the top of your hw cylinder (in the centre of the dome) is furred up and constricted - this happens in time. Remove the pipe at this outlet and clean the union in situ to restore flow. Don't forget to shut off cw supply from cw storage and drain off via hw bath tap first. Be careful not to damage the cylinder when disconnecting hw outlet pipe.
 
Clive100 said:
The hw output union on the top of your hw cylinder (in the centre of the dome) is furred up and constricted - this happens in time. Remove the pipe at this outlet and clean the union in situ to restore flow. Don't forget to shut off cw supply from cw storage and drain off via hw bath tap first. Be careful not to damage the cylinder when disconnecting hw outlet pipe.
Click to expand...

thats worth checking.

Untitled

Untitled


this is ideally what you want.

yours should be similar but the supply to the hot taps is higher up.

this should still be ok providing this pipe has a fall away from the open vent allowing any air to make its way toward & up & out open vent.
 
thats worth checking.

Untitled

Untitled


this is ideally what you want.

yours should be similar but the supply to the hot taps is higher up.

this should still be ok providing this pipe has a fall away from the open vent allowing any air to make its way toward & up & out open vent.[/quote]

Yes our supply pipe to the hot taps is above the ceiling level in that photo and not below it
 
Clive100 said:
The hw output union on the top of your hw cylinder (in the centre of the dome) is furred up and constricted - this happens in time. Remove the pipe at this outlet and clean the union in situ to restore flow. Don't forget to shut off cw supply from cw storage and drain off via hw bath tap first. Be careful not to damage the cylinder when disconnecting hw outlet pipe.
Click to expand...

ok will try and take a look into that.

I need to tie the ball valve up first then open hw tap???
Do I need to drain the immersion before I remove the union at the top or should turning on the hot tap drain it so I can remove pipe??
 
D

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