Stuart Turner M330N enough to power rain head shower?

Mad Benny

I have a shower in the attic that uses a Stuart Turner M330N negative head pump. I was thinking of replacing the electric shower downstairs with a rainhead feeding from the same pump.

Could this pump feed two showers (obviously not running at the same time) and is it powerful enough for a rainhead shower?

yoshytoshy

You'd be crazy to use one of those shower heads ,they use a huge amount of water.

Joey the lips

a 330n is a 1.5 negative head pump. I would not use it for a head bigger than 6 inches.

knighted_1

Joey the lips wrote: »

a 330n is a 1.5 negative head pump. I would not use it for a head bigger than 6 inches.

why ?

Joey the lips

knighted_1 wrote: »

why ?

Because most product manufacturers rec that a 6" head is the max for a 1.5 bar pump.

Additionally if the draw is greater than the flow it reduces the output in the head which basically translates into a 12" head looks very poor on a 1.5 bar pump.

Mad Benny

Joey, this shower claims to work with 0.1 bar.

On the same page there is a link to the manual. It says

• min maintained Pressure (Gravity system):
0.1 Bar (0.1 bar = 1 metre head from cold tank
base to showerhead outlet).
Note! 0.25 Bar when running both outlets.

Looking at the Stuart Turned web site it says all negative head pumps are "universal" - meaning that they work as both negative and positive head pumps. As this pump is old (2003) does it apply to it also? The new shower is down stairs below the pump.

Lastly, would it wreck the pump of the shower was turned on in the attic conversion and in the new shower downstairs at the same time.

Thanks again!

Joey the lips

Mad Benny wrote: »

Joey, this shower claims to work with 0.1 bar.

On the same page there is a link to the manual. It says

• min maintained Pressure (Gravity system):
0.1 Bar (0.1 bar = 1 metre head from cold tank
base to showerhead outlet).
Note! 0.25 Bar when running both outlets.

Looking at the Stuart Turned web site it says all negative head pumps are "universal" - meaning that they work as both negative and positive head pumps. As this pump is old (2003) does it apply to it also? The new shower is down stairs below the pump.

Lastly, would it wreck the pump of the shower was turned on in the attic conversion and in the new shower downstairs at the same time.

Thanks again!

There is 15cm in one 6 inches so 18 is 7". I would say you would be fine but its prity in line with what i said.

You wont reck the pump but the reduced flow might effect the shower upstairs.

Mad Benny

Thanks again. On further inspection it says that the maximum flow is 6.0 bar.

Could it be more than 1.5 bar? If the rain shower is below the pump does that improve the pressure because it doesn't have to push the water up?

See bottom right hand side of image.

slavetothegrind

you confuse pressure with flow there!

the duty head is the distance between the pump and the water source, pressure is not your quantifier here it is flow.

as has been said a big durty shower head is a lovely luxury but it eats hot water at an incredible rate.

the pump is not your concern but the amount of hot water available to it is!