Kawan Baru
Does anyone have a proper figure what the water pressure suppose to be in a normal circumstances?
My house one is bout 0.18-0.24 mPa PSI.
See the photo below.
If below is normal?
Minimum = http://img833.imageshack.us/img833/217/ak44.jpg
Maximum = http://img208.imageshack.us/img208/8137/9g6t.jpg
Budiman
Wow, you got a pressure gauge on your line ... COOL !!
My "measurement" is a bit more layman, if I can "shoot" my plants (at the other end of my little garden) by half-closing (using my finger) the water tap (at full throttle) near the main gate, it is normal ... and where short of the flower pots ... low ... it fluctuates daily ...
Everyday is a good day for GOOD FOODand a GOOD LAUGH
Kawan Baru
Ya, i understand what u mean. maybe my expectations are too high on that pressure.
but let's see how. I might consider to install a water pump after the tangki for other bathroom outlet
Administrator
CM, I believe the pressure guage shown is attached to his sand filter in the garden - water from the main Syabas supply to the house.
As for the max pressure shown, it is similar to what I see on my filter pressure guage- about 30 psi?
this i believe is the average pressure in SJ/USJ - that is pretty good already.
Administrator
Water from your water storage tank does not provide the pressure like from the main water supply. Internal water pressure is purely due to gravity. The pressure depends on how high the tank is from the outlet pipe - so if you live in a 2-story house the water pressure from your water tank is very low in the bathrooms upstairs but reasonable in your bathroom downstairs and the kitchenOriginally Posted by sovietmah
Budiman
If I may add, for anyone wanting to install a pump after the tank, have your pipes and joints checked properly for fitness. It can be risky and burst a leak because the pipes may be old, normal pressure specified PVC pipes and only good for gravity water pressure, not withstanding much higher water pressure. People often think its ok and can work, but its to your peril, be forewarned. I don't even want to consider this based on what I see installed by the developer which is evident of sloppy workmanship. The shower pressure in the master bedroom is HORRIBLE!...from DAY 1 and your sime developer WON'T DO A DAMN THING! eventhough the house is under warranty. CHEATED IN THIS!...the workaround was to install a water heater with internal pump. My next project is to renew some of the outgoing pipes to better and higher quality type. But I do face a problem where some of the pipes are concealed or unreachable due to it being installed before it was walled up.
Kawan Baru
OK noted.
Sometimes i walkby USJ 9 shoplot, i see their water pressure also stayed at 25PSI,
Kawan Baru
I did consider bout this point,
I had just finish my renovation, changed all the pipe from meter to tangki and meter to kitchen (all black poly pipe)
but did not change pipe from tangki to all bathroom.
regret now if install a pump and the pipe burst.
but because i renovate my bathroom, so all bath room comes with new pipe (and conceal inside the tiles).
I did not change from tangki to outside point of the bathroom, might consider change poly pipes for these area.
Budiman
My house bathrooms and kitchen run strictly on mains ... the water from tangki is only sent to the laundry area and the small bathroom at the back, so it is mainly for laundry and water cut emergencies. Hence pressure is not a problem per say ... have to do a bit of forward planning when you renovate the house.
Everyday is a good day for GOOD FOOD
Banned
Your house water pressure should be around 25-30 psi or 0.18-0.25 mPa..
Psi and mPa is different pressure unit as shown in different color code of the pressure gauge.
Banned
Not entirely correct..
It depends on 2 variables (mass of the liquid column and height of the liquid column) and 1 constance (gravity).
Since the liquid in the piping is water, the variables are the height of the water column and the mass of the water in the tank. When the tank on top is full of water, the pressure increasess.
Budiman
Haha!...people still use the word "tanki"...Its WATER TANK lah!
I grew up with Imperial system of measurements and gives me a better impression, although I frequently use metrics in engineering practice or specification. Easier to recall.
Anyway, this topic reminds me of contacting Wika gauges to buy a replacement gauge for my water filter. 0-100psi will be suitable. The old one is completely broken. Some inferior brand. First the face started to disintegrate, then needle pointer fell off, then jewel cover fell off..KAPUUUTTTT!
I think most modern homes have kitchen water supply direct from the mains and GI Steel pipes buried and concealed. This will pose a huge problem in future replacement as GI pipes will clog up due to severe scaling over the years. I face this problem and water pressure have dropped by at least half over a decade. I already changed one length to ease the problem at the water tank a few years ago. DIY of course. This is where I observed a lot of sloppy workmanship, one joint was leaking. Evidence of how inferior this developer builds homes..Nice name, nice image, looks nice on the outside...ROTTEN and Short lived QUALITY INSIDE if checked carefully! Numerous homes around my place have incurred failed incoming water pipe and a huge water bill. It was to their peril and cost to replace the mains supply line. If I'm right, this shouldn't happen, unless its purely incompetent workmanship during the installation.
One thing, NEVER feed a instant heater unit with mains water supply, its NOT designed to work in this fashion. The internal tank may swell and burst one fine day. Open the lid and you may agree I'm right.
Banned
I have exactly the reverse problem, the pipe pressure is too high.
The high pressure is caused by the height of water column. I mentioned before, the incoming water from Syabas is pumped to the top floor (more than 20 storeys in height).
What I did is I restrict the flowrate of incoming water :
1) via the main valve before water entering my unit, and
2) via the different control valves to kitchen, bathrooms, balcony and yard.
So far, I have no chance to use the build-in pump of the instant water heater !! ( I was not aware of the high pressure when I bought the shower heater ... )
Administrator
You have made one mistake with this - when there is a water cut by Syabas, you get NO water to your bathrooms and kitchen(s). As for me, when we renovated the house, all bathrooms run on tank supply and the kitchen sinks get one pipe from the tank and a 2nd pipe from the mains. When there is a water supply cut, the kitchen sink is still functional with water from the storage tank. My ground level bathroom has enough pressure. Water pressure upstairs need to be supplemented by a Grundfos pump.
Budiman
Generally, if the pressure is sufficient, there's no need to spend extra on a WH with pump. These are specifically catered to those with water pressure issues. One of them is me, although it happen in one bathroom only, the others are better off.
If I'm right, its actually worse to address overpressure than underpressure.
BTW, there exist highrise buildings, like hotels with the main water reservoir at ground level or basement. The water supply is pumped up by means of multistage pumps and air pressure. Pros and cons depending on building design, but primarily to eliminate having water tanks or reservoirs on the building top as they increase building load quite significantly.
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