Pipework when using a pump

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Hi I haven't been on here for a while. I hope everyone is doing well.

I about but am about to pull out an old bathroom in a flat that needs renovating.

The water is fed from a tank next to the bathroom but being a flat is only at say 1.5m above floor level. The water pressure is p!55 poor.

The bathroom has a power shower which is ok. I plan to retain this but was thinking to better the bath and basin to install a pump (Salamandrin type) as long as I can get power to it.

If I do this do I just tap into the 20mm pipes currently serving the bath, reduce just before the pump and then come out the pump in 15mm and T to the bath and basin taps? I know bath taps are normally 20mm all the way through but does this become 15mm if via a pump?

Also I assume the WC stays on the mains.

Any help much appreciated.

 

[Elsa TLC]

Could you not fit an unvented cylinder?

 

[padstar]

I need to get it done as quickly and cheaply as possible. At some point the entire flat is being ripped out and remodeled but not now so just looking for an easy win. If the pumps are an issue I will just leave it with the weak gravity feed.

 

[Elsa TLC]

I need to get it done as quickly and cheaply as possible. At some point the entire flat is being ripped out and remodeled but not now so just looking for an easy win. If the pumps are an issue I will just leave it with the weak gravity feed.

Cheap pump is an easy solution if that's what's needed. But best not add it inline with powershower.

Are you intending on selling?

 

[padstar]

Power shower will sit before the pump. Not sure if it has its own direct feed. Need to check.

It's a rental. Does that matter?

 

[Elsa TLC]

Power shower will sit before the pump. Not sure if it has its own direct feed. Need to check.

It's a rental. Does that matter?

You don't want a pump pumping a pump