Pumping the mains cold water supply...

[pmx_super]

Hi,

I have a Trevi Boost shower mixer. This thing uses mains water pressure to 'suck' hot water from the tank to give a pseudo-power shower.

I am told that it's successful operation depends upon having a constant and strong mains water pressure. Living on the second floor of a block of 70s flats this something i don't have!

The guy who plumbed in the dishwasher noticed a pipe-configuration in the kitchen that he mentioned once would have had a pump in it to pump the mains cold water. It was now just capped off.

My theory is that re-instating a pump here might give me the mains pressure i need for my Trevi Boost to work properly. However, I have searched around and can't find any pumps that are sold for this purpose.

Does such a pump exist? Is this a 'legal' thing to do even (pump mains cold). Finally do u think that this might be the key to get the Trevi Boost working effectively?

All comments very gratefully received.

 

[oilman]

There aren't any available, as it's not legal to pump the mains.

 

[corgiman]

what about an accumulator?

 

[oilman]

Would that be 12V lead-acid?

 

[kevplumb]

dont fink he meant that
you are showing your age if you can remember them

 

[oilman]

Yeah, I'm seventeen, got one in my car. Take it you have a dynamo run from your bike's rear wheel then?

 

[kevplumb]

yeah if i pedal fast enuf

 

[ChrisR]

There is at least one company doing Accumulators. I've forgotten their name but they're associated with Oso as in unvented cylinders. They cost a bloody fortune for a tank of air with a diaphragm and a nrv.

You need to test your mains pressure first - if you only have 1.5 bar you're wasting your time.