Boosting a shower with a pump

[KingDoey]

Hi

I tend to do gas and heating and don't get too involved in plumbing, so after some advice chaps.

Sister in law has a house newly refurbed by builders. It's got a lovely built in mixer shower on an open vented system. Pressure is horrendous.

Was going to put a combi in but due to her budget have suggested a pump instead. No chance of siting pump in airing cupboard and then running feeds for shower.

Was thinking I could convert cold to mains and fit single impeller under bath on hot to shower? Is this a viable option. Only other way I can think is to fit twin impeller in airing cupboard and boost all hot and cold supplies? Will this work? Only thing I'm thinking is pump will come on to fill wcs! Will do her head in!

Any ideas as best way to go with this?

Cheers

 

[ShaunCorbs]

What's the incoming pressure and flow like ?

 

[KingDoey]

The mains is decent, from the cwsc and cylinder is horrendous

 

[ShaunCorbs]

long shot but i would fit an unvented cylinder if the mains will take it as you would pay 3-400 for a decent pump and bits if its not can you get at any of the pipework for the shower?

 

[GetBry]

If you're planning to stick with the vented system you could site a positive head salamander pump in the loft. An alternative could be to look at 4. SP22S Balanced Flow Pack - Shower Power Booster. These pumps are very quiet and dead easy to fit.

 

[KingDoey]

Cheers Shaun, unvented out of question got no chance of getting discharge out!

 

[ShaunCorbs]

But the don't work and are rubbish @GetBry

 

[KingDoey]

Was going to have a go with those. Have you used them before?

 

[ShaunCorbs]

Yes take a set out more of a restriction and leak where the motor is

 

[KingDoey]

Appreciate that mate was going to give them a go. So really my only option is to fit a twin impeller under bath do you think I will get away with this?

 

[ShaunCorbs]

Yes but will be noisy

 

[KingDoey]

Ok mate thanks. Sorry to go on so I can install a twin impeller under the bath (don't care about the noise it's her problem). Literally just on the hot and cold feeds to the shower and that will work ok?

She's got a tiny cylinder in there at the minute so going to put a 1200x450 in aswell. Any pumps you can recommend?

Thanks again for all the help mate

 

[ShaunCorbs]

They should be on there own supplies, so if you can run new supply's when your changing the cylinder get one with a shower / secondary return connection

And Stuart turner are very good