Poor hot water flow

[b21playa]

Hi all

Have a gravity hot water cylinder in the bathroom on the 1st floor, with header tank in the loft, but the flow to the kitchen is very poor.

Is there anyway of increasing this, or could there be a problem?

Not sure if its always been like this, as when I got the property, the kitchen was removed the same day. Hot water in the bathroom seems better then the kitchen

any ideas?

 

[PrenticeBoyofDerry]

Can we assume the kitchen is on the ground floor?
You could increase flow, by increasing the pipe diameter. It could also be that a blockage or build-up has occurred in the pipe leading to the kitchen or tap at sink needs looking at.

 

[sooey]

Probably had a high pressure tap or taps fitted when the kitchen was done, the cold will be fine off the mains but the hot will be cr*p.

 

[b21playa]

Can we assume the kitchen is on the ground floor?
You could increase flow, by increasing the pipe diameter. It could also be that a blockage or build-up has occurred in the pipe leading to the kitchen or tap at sink needs looking at.

Yes kitchen is on the ground floor.

 

[b21playa]

Probably had a high pressure tap or taps fitted when the kitchen was done, the cold will be fine off the mains but the hot will be cr*p.

This is the tap I fitted, which is supposed to be for low & high pressure

http://www.screwfix.com/p/moretti-p...rch-_-SearchRec-_-Area1&_requestid=212902#_=p

 

[oldbuffer]

It says in the specification (3rd line down) "Not suitable for gravity fed systems", which is what you've got. It also says minimum pressure 0.5 bar, to achieve which the base of your cold water storage cistern would have to be 5.0 metres above the height of the tap's outlet spout. At best you are likely to have 4 metres or (approximately) 0.4 bar.

Changing the tap is your best bet.

 

[Dan Robinson]

RTFM

 

[Classic40]

Grundfos UPA 15/90.

I will be fitting one to my vented cylinder setup shortly.. New thread to follow.

Reports to add 0.5 to 0.75 bar and fits inline.

 

[sooey]

Can't wait.

 

[b21playa]

It says in the specification (3rd line down) "Not suitable for gravity fed systems", which is what you've got. It also says minimum pressure 0.5 bar, to achieve which the base of your cold water storage cistern would have to be 5.0 metres above the height of the tap's outlet spout. At best you are likely to have 4 metres or (approximately) 0.4 bar.

Changing the tap is your best bet.

Oh cr4p, didn't see that. Not the easiest to change tap either, but will have to or add pump.

Any suggestions on tap?

 

[PrenticeBoyofDerry]

Any suggestions on tap?

Do you have an idea what head of pressure you have?
Maybe this
http://www.screwfix.com/p/swirl-divine-dual-lever-mono-mixer-kitchen-tap-chrome/76769

 

[b21playa]

Any suggestions on tap?

Do you have an idea what head of pressure you have?
Maybe this
http://www.screwfix.com/p/swirl-divine-dual-lever-mono-mixer-kitchen-tap-chrome/76769[/QUOTE]

I'd say 3.5 - 4m

 

[b21playa]

Are there any other pumps available to boost flow?

EDIT

What about this http://www.amazon.co.uk/Electronic-Automatic-Washing-Machine-Booster/dp/B00BKXUQ8W ?

 

[Classic40]

A single impeller shower pump would do the trick, various models from 1.5 bar to 2.4 bar on screwfix: http://www.screwfix.com/c/bathrooms...820270#category=cat820270&impellertype=single

However for £40 I would be tempted to give that one on Amazon a try. It says it adds up to 0.80 bar.

Take a look at this video showing that pump on Amazon in action; https://www.youtube.com/watch?v=0ImO4br-C2I