Would a bigger and higher water tank increase pressure?

[JP_]

0.1 bar on hot water.
Rather than buy an expensive pump, would getting a larger tank placed as high as possible increase the pressure much?

 

[Gasguru]

No, it would make virtually no difference....and water regs require a certain distance above cisterns for maintenance.

 

[JP_]

Hmmm. So, about how much would you expect to pay for one of those pumps to be installed? In other thread, pump was about £550.

 

[sxturbo]

Hmmm. So, about how much would you expect to pay for one of those pumps to be installed? In other thread, pump was about £550.

Depends on the pump you choose and the ability of fitting yourself or not.

If it has to be installed by a pro then it's likely a day rate on top of the cost of the pump.

 

[fixitflav]

0.1 bar on hot water.
Rather than buy an expensive pump, would getting a larger tank placed as high as possible increase the pressure much?

View attachment 248780 View attachment 248781

A larger tank makes no difference. The higher the better, but judging from the pics, you have something like 3m between tank water level and shower head. With the right shower that should give acceptable performance. I have about 1/2 that head, and while it's not a blistering shower it's perfectly adequate.

 

[denso13]

0.1 bar on hot water.

You sure that's all you have, it looks clearly more than that?

 

[JP_]

that's what the pressure meter read on the shower hot pipe

 

[fixitflav]

that's what the pressure meter read on the shower hot pipe

If that's with the shower running, could be a valve part closed, or some other blockage.

 

[Gasguru]

Looks around 2.5m between the cistern water level and shower head but after the head loss (friction from pipe and fittings) you've got next to no pressure left.

 

[ETAF]

this may be worth a read - pressure
https://www.mbd-bathrooms.co.uk/Information/Understanding_Water_Pressures_and_Bar_Ratings.php
and flowrate
https://www.mbd-bathrooms.co.uk/water-pressure-and-water-flow_93.htm

i went through this sort of thing for our shower when i redid the bathroom.
In the end, I made sure we had 22mm pipework from the hotwater tank all the way to the hot water tap on bath, lower pressure bath/shower lever mixer Tap (just with a normal washer) and then used 11mm bore shower hose. i put a pressure reducing valve onto the cold side of the tap.

Hot water and cold water tank are combined together and again the tank is quite small, So i may have 2m 0.2bar BUT by changing the pipesize made sure i had the flowrate

And been happy with the shower, perfectly adequate, used every day.

In a bungalow, and the hot water tank in loft on main floor joists - so distance from the bottom of the tank to the shower head is probably around 1m if that

I looked at pumps, and to use a pump, i would need to change the hot water tank, to have more capacity.

 

[JP_]

Yeah, I am happy with the shower to be honest, in fact, I don't have a problem with it at all, but you know, the wife mentioned it.

I just had a look up there and as far as I can tell all valves are fully open.

Some photos of various things, mostly I don't know what they are or what they do! The round red valves were fully open anti-clockwise though

This next one felt quite loose - open, but just a bit loose/wobbly

 

[old duffer]

Best to consult the experts and learn all about it. There is the nice and simple video explanation https://practical.engineering/blog/2021/4/6/flow-and-pressure-in-pipes-explained and there is the great interactive give me the numbers support so you don't have to listen to anyone guessing. https://heatpumps.co.uk/technical/flow-rate-and-pressure-drop-simulator/