I believe that some time ago I may have replaced the Shower Pump that stopped working after approximately 3 to 5 years or more with the wrong Shower Head Pump type.
The Shower is Gravity Fed from the Cold Water Tank in the Loft above the Bathroom where the Hot Water Tank is within the Airing Cupboard next to the Bath.
When reviewing the Bristan [Varispeed Water Pump 50] Installation Instructions I assumed that this Pump would work ok because the shower head was more than 230mm below the bottom of the Cold Feed Tank as stated within the Instructions.
I believe that I am correct to assume that the pump we currently have is a Positive Head type.
This being due to the fact that the Installations Instruction and User Guide has a Negative Head Option Kit, that was not included with the pump, and the method shown of how the Negative Head Kit is installed with a Pull Cord Switch.
> With this being said is there any way of knowing from just looking at and running a shower pump if it is a Positive or Negative head shower pump?
Unfortunately our TRITON, Capella, Thermostatic Mixer Shower has a very poor pressure that will only start with both the Hot and Cold when the Shower Head is at waist height.
If I were to change the current Bristan Shower Pump to a known Negative Head Shower Pump will my Wife and I get and feel a shower with a notably higher improved pressure from the Gravity Fed Cold and Hot Water Tank the Shower Pump sits next to on the floor within the Airing Cupboard?
The poor pressure may also be down to the cost of the Pump when I bought it? It may have been in a Sale or I just thought it was good value for money... Unfortunately this Shower has never had the pressure expected in comparison to Hotels for example:-(
Moving forward from what I have read if I were to change the Shower Pump I think that I would invest in a Centrifugal Negative Head Shower Pump. > Centrifugal - Better Quality than a Regenerative Pump and Quieter. > Negative - Assumed to be for improved pressure. > The Shower Head is within 600mm from the bottom of the Cold Water Tank above.
Please do not hesitate to ask any questions for clarification on anything mentioned or not mentioned.
Thank you in advance, I will look forward to your feedback.
I trust that you will continue to be safe and well during this current global Coronavirus uncertainty.
A video clip of the Shower Flow with and without the Mixer can be sent for review upon request.
Hi dc4_diy Presumably you have the pump speed control adjusted to it highest setting. If yes then replace the pump with one that gives nearer 3 bar pressure, positive head will be fine for your installation. Regards S
Thank you for your feedback and apologies for the delay with my reply.
I believe that the pump speed has been set to the maximum it can be.
Pre-Covid: My Wife and I had Two Plumbers around to review what we have and give us a quote. This was to either improve the pressure of what we have or replace the gravity fed mixer shower with an electric shower.
Plumber 1: Took a look and said that he would be able to improve the pressure with the existing mixer shower. From what was said and what I seen him looking at and do, I assume that he was going to replace the existing shower pump and refasten the hot and cold water going through the wall to the mixer tap. He also adjusted the variable speed dial on the pump during his visit. I therefore assume that the pump speed has been set to the maximum it can be. Due to the first lockdown we have never been contact again.
Plumber 2: He said that we could get almost any electric shower and he would install it for a fixed price. But we would need to get an electrician to do the electrical part of the electric shower installation and purchase the electric shower, ideally letting him know which one before we purchased it.
As with Plumber 1; Due to the first lockdown we have never been contact again.
OMG: From April 2015, I have a 16 Second MP4 video clip of both the hot and cold water feed's to the mixer tap that I can send by email upon request.
My preference is for the mixer shower to give us the ideal result of having 'Power Shower' pressure that we need to turn down and not keep hoping the shower pump won't cut out whilst having our shower.
But if we need to go electric, to get this we need to go electric...
Hi dc4_diy Your post contains conflicting information. Your shower is either gravity fed or fed by an electric pump. You mention a mixer tap - how is this related to your problems and the shower? You refer to turning down the shower pump but this is done using the shower valve control. Finally you refer to going electric but your pump is already electric. I am confused. Regards S
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