pipe run to aqualisa shower

[calvert]

I want to fit an Aqualisa aquajet shower upstairs. It is about 8metres from the header tank and hot water cyl.

The hot pipe will have to go up a couple of feet to get into the roof space then its all horizontal before dropping to the shower. The cold feed has about 2 feet head to the shower.

My questions are:

will the showers pump be enough to give a fair pressure;
can I run speedfit or similar plastic pipe to it;
Is there anything to gain by using 22mm as far as possible?

Elsewhere on this site I read that a pumped shower can just use feeds from convenient hot and cold pipes nearby.
Is that reccommended please?

Thanks in advance.

 

[Jake1886]

The pump should give you decent pressure

Yes you can run plastic pipe, use Hep20 as Speedfit is $hite!

The shower would need an independant cold feed run from cistern in loft. And a independant hot feed run from cylinder, you could use a essex boss or surrey flange on cylinder.

 

[calvert]

Thanks for that quick reply Jake. Could I take a feed off the hot water supply pipe from the cylinder as its only a diddy pump in the shower rather than a high volume dual feed pump?

 

[tincup]

Hi

What type of pump did you have in mind?
A twin impeller pump gives balanced feeds. Sometimes uneven pressures can be troublesome.

 

[Jake1886]

I would always recommend an independant feed.

Although check your manufactures instructions as some say you can tee into the hot supply.

 

[calvert]

the pump is integral in the shower unit. Im pretty sure it is after the mixer. I fitted one years ago and the instructions then were to tee into the hot supply from the cylinder, it had to be before anything else though.

 

[Jake1886]

The proper way to do it is to fit a surrey or essex flange.

I don't like the possibility of drawing air into the pump so they are what I fit.

 

[calvert]

Thanks for that, thats what Ill do. Cheers