Suitable shower for gravity and pump ?

[Lenc2012]

Morning all

I am looking at installing a shower over the bath.

There is a shower attachment from the bath mixer tap assembly and when I hold it up to the required height I would say the pressure is borderline for a decent shower.

The airing cupboard backs onto the end of the bath where the wall mounted shower will be installed and the storage tank is in the loft directly above.

I am hoping that by bringing the hot water supply from the pipe just after the immersion tank and a cold water feed from close to the loft tank the pressure will increase enough to make it suitable.

My question is if it is possible to buy a mixer shower that, if the pressure does not increase enough, a pump can be added later ?. Or is a shower either a mixer or pump and not suitable for both

Many thanks for any info or suggestions

 

[kbdiy]

I don't think your planned pipework alterations will make a scrap of difference - the static head of water will still be the same regardless of where you tap off the feeds. If you have space above you could raise the storage tank to improve the head and you will get a marginal improvement, otherwise it's a definite yes for the pump option.

 

[Madrab]

If you may want to add a pump later, it sounds like you may have to if the current pressure isn't enough, you will need to have dedicated hot n cold feeds from both tanks to the shower, and not tee'd off of the normal domestic pipework.
Most normal mixer showers either manual or thermostatic can be used with either gravity or pumped supplies.