no pressure to shower

[jase158]

Did you turn on the water with the shower valve off, you need to make sure the water doesn't go spurting out across the room, close the shower door or have somebody with a bucket stopping the water from going all over the bathroom. This will clean the pipes out. If not then the pump you listed is a positive head pump and may work, but a negative head pump will definetly work .

 

[franky]

positive should work the tank is above the shower?

 

[netdef]

Ok I dont think your hot tank is pressurised, I think the hot a cold both work off gravity?
Right so what is the difference in height between your tank and the shower?
you probably have an air lock just but it back together and just let it run out of the lowest point does that make sense

The hot water tank is pretty much directly behind the wall of the shower on the same level, the cold water tank is above in the loft a few feet above the shower. All other hot is fine. the tank has a little pressure release valve on it i have to open now and then when a bit of air gets stuck in it. You usually know because the pump gets louder as air gets in.
the cold water is straight from the bottom other the tank, so I guess its the weight of the water and gravity doing its job.


reading some other forums people are saying these thermostatic bar systems are usually not usable in a gravity fed system. I am beginning to think that myself now, by time it gets through the thermostat and little pipes and the selector to change from shower head to flexi shower head it has nothing left.

it not even low pressure, it totally unusable!

 

[netdef]

Salamander Automatic Negative Head Unit RMC3 - Salamander Pumps available at Plumbworld

so would this one suffice, I am not after a power shower as I have made it and open shower with one panel and water will get everywhere I would just like water to come out, I am sure 1bar would be enough.

I will not attempt this myself but how easy or hard is it to add one of these pumps, can be attached to the pipe coming from the water tank? if so then you have to just find which is the hot feed for the shower, cut both of them, attach to pump then reattach back the the pipes?

 

[WHPES]

Follow the manufacturers instructions precisely. The pump must be situated level with the bottom of the cylinder.

Level of difficulty depends on how easy it is to get at the hot and cold pipes feeding the shower.

Is the shower you have bought suitable for low pressure systems? Many available from B&Q etc nowadays are only suitable for modern high pressure plumbing systems.

 

[kimbo]

Firstly the water supply should be roughly of equal pressure to work properly, secondly if they are both gravity the higher the shower head the less pressure, if there are check valves on the pipework and the header tank is directly above the shower head there is probably not enough head to open them. If you have pressurised hot water and a gravity cold you would need a check valve on the pipes to stop the back feed into the cold.

 

[Bartdude]

my shower is this one


THERMOSTATIC ROUND CHROME SHOWER MIXER TAP VALVE SS021 on eBay (end time 14-Feb-11 13:17:23 GMT)


This is what is says it's compatible with.
These taps & showers will work on the following systems
·Combination boiler systems
·Pumped hot water systems
·Un-vented hot water systems
·Standard pressurised hot water cylinder type systems

According to those instructions this shower isn't suitable for a low pressure water supply. A low pressure mixer may work but it might not be that powerful.

This may explain it.

Shower pump selection guide

 

[tamz]

It definitely wont work as it is as you don't have the head of water. The tank would need to be 5 meters above the shower head.
It told you here


If you want to keep it you will need to pump it.

 

[netdef]

It definitely wont work as it is as you don't have the head of water. The tank would need to be 5 meters above the shower head.
It told you here
View attachment 2104

If you want to keep it you will need to pump it.

didn't know nothing about bar pressure, it seemed very low so thought it would work, only now reading others posts that people saying 0.1bar per 1m

looks like a pump it is then.

 

[netdef]

According to those instructions this shower isn't suitable for a low pressure water supply. A low pressure mixer may work but it might not be that powerful.

This may explain it.

Shower pump selection guide

thanks for the guide, wish i had seen this beforehand.. to late now I will have to get a pump... the shower is staying