🧀 Please tell me about Hot Water?

Section62

BUFF said:

Or it's gravity fed & it's the difference in head between an upstairs bathroom & a downstairs kitchen.

Possible, but I think unlikely given the proximity of the bathroom tap(s) to the hot water cylinder giving 'very poor' flow vs tap(s) elsewhere in the house being Ok.

The difference in head between upstairs and downstairs may largely be offset by the increase pipe run to reach (e.g.) the kitchen. 

Unless this is a three-storey house?

danrv

Morris_who_likes_Cheese said:

More taps downstairs in the kitchen - rate of flow is better here.

Should be roughly the same from all taps. It’s likely, as mentioned that something is obstructing the flow. Check condition of taps too.
I have hot water on immersion and the tank is near the bathroom. Good gravity pressure all round.

BUFF

Section62 said:

BUFF said:

Or it's gravity fed & it's the difference in head between an upstairs bathroom & a downstairs kitchen.

Possible, but I think unlikely given the proximity of the bathroom tap(s) to the hot water cylinder giving 'very poor' flow vs tap(s) elsewhere in the house being Ok.

The difference in head between upstairs and downstairs may largely be offset by the increase pipe run to reach (e.g.) the kitchen. 

We really have no idea of the layout of this house  - where the cylinder is & what type, how the bathroom & kitchen are located, how they are piped & with what taps. Until we have more positive info we are all just guessing ...

Section62

BUFF said:

Section62 said:

BUFF said:

Or it's gravity fed & it's the difference in head between an upstairs bathroom & a downstairs kitchen.

Possible, but I think unlikely given the proximity of the bathroom tap(s) to the hot water cylinder giving 'very poor' flow vs tap(s) elsewhere in the house being Ok.

The difference in head between upstairs and downstairs may largely be offset by the increase pipe run to reach (e.g.) the kitchen. 

We really have no idea of the layout of this house  - where the cylinder is & what type, how the bathroom & kitchen are located, how they are piped & with what taps. Until we have more positive info we are all just guessing ...

I think the OP gave us a rather large (and very useful) clue in their second post.....

Morris_who_likes_Cheese said:

The taps are in the same room - the bathroom, where the rate of flow is very poor, so much slow, I could wash my hands twice by the time the hot water appears. 

More taps downstairs in the kitchen - rate of flow is better here.

....unless the pipe from the hot water cylinder in the bathroom takes a very circuitous route to get to the bathroom taps, you'd expect the flow rate from those taps to be as good as (if not better than) anywhere in the house.

Which suggests some kind of flow restriction - either along the pipe, or the tap(s) themselves.

Hence suggesting the OP traces the route of the hot pipe from the cylinder to the tap, and me querying what types of tap(s) are fitted in the bathroom.


It would be a fairly unusual set of circumstances for the difference in head between the ground and first floors to account for such a large difference in flow rate.

bris

Morris_who_likes_Cheese said:

 but when I turn the tap on, it takes 20 seconds for hot water to appear. It’s not good.

First world problems eh, can it get any worse

plumb1_2

Could be the tank and cylinder are in the same bathroom cupboard?
so it might have a low head pressure but still a good flow rate, compared to downstairs taps.
with more info it’s a guessing game

BUFF

Section62 said:

I think the OP gave us a rather large (and very useful) clue in their second post.....

Morris_who_likes_Cheese said:

The taps are in the same room - the bathroom, where the rate of flow is very poor, so much slow, I could wash my hands twice by the time the hot water appears. 

More taps downstairs in the kitchen - rate of flow is better here.

....unless the pipe from the hot water cylinder in the bathroom takes a very circuitous route to get to the bathroom taps, you'd expect the flow rate from those taps to be as good as (if not better than) anywhere in the house.

Which suggests some kind of flow restriction - either along the pipe, or the tap(s) themselves.

Hence suggesting the OP traces the route of the hot pipe from the cylinder to the tap, and me querying what types of tap(s) are fitted in the bathroom.


It would be a fairly unusual set of circumstances for the difference in head between the ground and first floors to account for such a large difference in flow rate.

Going by how my house (an Edwardian mid-terrace) was plumbed when I bought it I wouldn't be so sure ... If the cylinder is in the bathroom & the tank not much higher then there may be very little head at all to the bathroom hot tap. 
His bathroom taps could also quite possibly be on 15mm with 1/2" valves & the kitchen tap(s) on 22mm with 3/4" valves but we just don't know atm.