This is the expert guide to water feature pressure pump sizing. It covers:
- What flow rate does my rain shower or body jet or shower panel need?
- How many numbers of bathroom?
- Peak hour bathroom usage?
- What kind of pipe line they laid?
- What max head or pressure need for those fittings?
So, if you're struggling to figure out which pump is right for your home, this is the guide for you.
Let's get started.
What flow rate does my rain showeror bathroom need?
Flow rate is the term used to describe the amount of water flowing through shower head or shower panel over a period of time. flow rate is calculated in Litres per Minute/LPM orLitres per second/LPS or Litres per Hour/LPHfor example:
A shower with a 10/LPM (Litres per Minute) flow rate will be10 litres of water in one minute.
Now, if you are having 4 number of bathrooms with 1 foot or 12” rain shower. Each rain shower flow rate will be 15 LPM. Rain shower working pressure will be 3 bar it means 30M. Peak hour usage will be 3 bathrooms
We have to choose 15+15+15 = 45 LPM head =30M
You can choose from our Grundfos product centre with required head and flow the above pump model CM 3-3 is matched.
Now some other house having 5 bathrooms. 1 bathroom has body jets 4 points with 12” rain showers. Another 4 bathrooms are 12” rain shower. Peak hour, 1 body jet bathrooms with rain shower and another rain shower bathroom will be needed. how we choose pump? For body jet 4.0 bar needed it means 40 M head. Flow of each body jet 10 LPM. both bathrooms have 12” rain shower rain shower flow 18 LPM with 3.0 bar needed.
Body jet flow -10 LPM each
12” Rain shower flow -18LPM
Total Flow =10X4 + 18X2=76LPM
Total flow / Hour =4560 Litres/Hour or 4.5 M3/H
Max head =4.0 Bar or 40M
If we check the above flow and head in Grundfos product centre above pump model CM 5-5 is matched.
We can easily choose the better model depends upon our requirement.
How to calculate a Grundfos pressure tank size?
Formula to calculate pressure tank size
V=Qx1000x (1+(cut in pressure) + (differential pressure)) / 4 x (Max start-stop per hour) x differential pr x1/0.9
Q=flow / hour (4.5)
Cut in pressure =1
Cut off pressure =3
No of start/stop per hour =80
Differential pressure = 1 bar
V=4.5 X1000 (1+3+1) / 4x80x1 x1/0.9
V=70.3x1/0.9
V=78 Litre so nearest tank size is 60 Litre
Grundfos Pressure Pumps in Coimbatore
Grundfos pressure pump has numerous models we can choose with our above calculated method. Domestic Pressure pump maximum operating pressure up to 6 bar. Maximum Flow 30000 LPH
Positive suction Pressure pumps
Grundfos CM BOOSTER, SCALA1, SCALA2, JPC, CMBE, CM TWIN BOOSTER, CMBE TWIN BOOSTER all are positive suction pumps.
Negative suction Pressure Pumps
SCALA1 SCALA2 and JPC are negative suction pumps. It will take water from sumps up to 8 M
Wattage
Grundfos pressure pumps are energy efficient pumps.0.7 hp produce 4.7 bar and max flow of 4000 LPH
Centrifugal Pump
A centrifugal pump is a general name used to describe any pump that operates using one or more impellers.
Material
Pump housing-Cast iron, EN-GJL-200ASTM, A48-25A
Impeller-Stainless steelEN 1.4301AISI 304
Material code-A
Code for rubber-E
If you’re struggling with advice regarding pressure pump sizing, we can visit free of cost in and around Coimbatore you can reach us9842247571, 9790047571. We’re open Monday to Saturday 09:00 AM - 9:00 PM