shower salamander pump pressure help

[habbyworld]

How do i know what pump i need for my shower. The pump i was sold is a 1.5 bar. When i have the shower on, the pump pulses. When i turn the how water up on the shower it does not pulse, but when i turn it down it pulses or turns of all together.
I have checked all of the water gates and they are working fine. The main feed pipe is 22mm and the shower pipe is 15mm. The pump is sat almost level to the shower unit about half way up the wall and the main water to the pump is feed through the water tank in the loft.

Thanks for any help anyone can give me.

p.s. I did have a plumber round and just lookign at it he said it was because of all the bends in the pipework, but i have sorted this and it has made no difference. Do you think i might need a stronger pump ? How will i know what one to get ?

 

[seco services]

sounds like theirs air in the pipework thats not getting released.
i take it the pumps higher than the cylinder.

 

[habbyworld]

It was higher, but now it`s about half way.

 

[seco services]

hows the hot taken off the cylinder ?

 

[habbyworld]

It is actually a little bit better than it was before. I just had a shower and it did not pulse as much. Infact, only when it started up.

 

[habbyworld]

The hot water comes of the top of the cylinder. The up pipe is 15mm and the down pipe is 22mm. The hot for the shower is on the 22mm pipe.

 

[seco services]

The hot water comes of the top of the cylinder. The up pipe is 15mm and the down pipe is 22mm. The hot for the shower is on the 22mm pipe.

surrey flange etc
up pipe down pipe.

have you not a pic.

 

[habbyworld]

This is a photo when my plumber mate done it.

and this is after when i done it.

 

[habbyworld]

I tell you what. Looking at both of them set-ups. I know who i`d rather employ.

 

[seco services]

how kinked is the hot flexi ? if thats restriced in any way it will pump more than it can receive.

is that still under warranty from salamander ?

 

[habbyworld]

there is no kink at all, i checked that before fitting it, i guessed that would restrict the flow and it`s fine. The pump is about 1 month old.

 

[seco services]

salamander won't issue a warranty if it fails because of the set up.

whats it doing now only purge when you start it.

 

[habbyworld]

When it starts and when i turn the temprature up and down.

 

[seco services]

have you still got the manual for it ?

 

[habbyworld]

yes, and there is one online as well.
When i turn it on, sometimes if i mess about with the temp settings it will work ok for a whole shower.