hi all

need advise on the water piping connection for my house. the black line is originally from main source to the house. i then added water filter and water pump to use the water from water tank. blue colour is the newly added and installed by the plumber.

problems i face:-

1. after using the water pump which pump out the water from the tank into the house i somehow feel the water pressure is not as good as the original direct source. water pump capacity not good enough? now running water pump, so valve 01 is close all the while.

2. plumber told me when i want to backflush the water filter, i need to off pump, closed valve 02 & valve 04 and open valve 01. this is to use direct water source. he says if i didnt do this the pressure from water pump might damage the water filter

3. when there is power outage, i need to do the same for above to run direct water source. because no power, the pump not running there will be no water in the house unless switch to direct water source.

i somehow feels that this is not very convenient as u need to turn this on and off here and there. is this common for all water pump users?

there is one time at night raining heavily and suddenly power outage. i have to use umbrella go outside of house to turn all the valve to switch to direct line in order to use water inside the house

anyone can advise or any modifications to be done?

wow. thanks for the helpful advise.

1. & 2. - if install checkvalve do i still need to have the valve 01? or can remove/replace with the checkvalve?

3. sorry what does it means do u mean by "bypass" for the filter, tank and pump. is it another piping system?

4. ok will check on the pump model and spec

oh. now i know what is bypass

if i were to make a bypass line for the filter, tank and pump, the valve will be for both the line and bypass line? or the valve on the equipment itself is sufficient.

something went up my mind.

my previous connection is either 2 way:
1. main water to house (without pump)
2. using water from tank (with pump function)

from ur proposal above, both line are running. so meaning every water usage is pressure from the pump? correct me if im wrong?

have a look at the drawing.

normal daily operation is all valve open, water pump on. (except bypass line)

if no power, pump will not works, there will still water from main source into the house.
if washing filter, backflush, there will be no pressure from water pump to water filter because have check valve.

red colour line is the bypass line for water filter. if water filter damage/repair V-F1 & 2 close. V-BP1 & 2 open. normal operation V-BP1 & 2 will be close.

if water tank need repair/maintenance, V-02 & V-03 close. still will have water from main source. valve 04 need close? need install check valve here? water will go to pump?

if water pump need repair/maintenance, V-04 & V-03 close. water from main source will still go to tank. and also go to house.

is this correct? hmm.gif

okok. thanks. if thats the case V-BP2 will be remove

another thing that still makes me wondering is on the daily operation water usage. the water will be both from water tank and also main source right? then what pressure am i getting? the pressure from the water pump or the pressure from the main source? and everytime water used in the house pump will operate right?

can i just off the pump then only using water from main? when there is no water from main, only i turn on the pump to use water from the tank and pressure from the pump?

If no water from main then water will be pump from tank right? Unless it's few days no water from main and the water tank empty by that time then water pump might damage if no water to pump? I'm not sure if my pump have dry run protection

Why the check valve need to be after pump?
Why simultaneous flow from main and tank not ideal?