Re: Low water pressure
eto 1 psi = 2.31 ft
Re: Low water pressure
@Jason_10
You probably planned this already but just in case you missed it (lots do): Make sure you disinfect your tank and water line before using. It could save you some tummy aches. You can do this by immersing your tank and water lines in high-chlorine content water. Can be done by using zonrox or those solid chlorine (powder) use for swimming pools, sodium hypochlorite, IIRC. Make sure to flush out the disinfectant completely before use. Your water could smell funny (zonrox odor) for a day or two but better to be safe.
BTW, if you live in the Manila Water concession area and your in-house plumbing is good, you can definitely drink water from the tap. Absolutely no need for bottled water nor water filters.
Posted via PHM Mobile
@bala
hehe, old habits die hard - NAWASA's one of those names like Dewey Boulevard and Governor Forbes Street. 🙂
Marami pa yan: Raon, Buendia, Herran, Vito Cruz...
Posted via PHM Mobile
Re: Low water pressure
You must check the size of the water which is fix at down size...Well I also faced the same problem but problem was in down size pipe...
Re: Low water pressure
You should also check if your pipe are properly vented.... To eliminate the back pressure
Posted via PHM Mobile
Re: Low water pressure
Have you solved your difficulty?
We have a 3 story house. Overhead tank (circa 80's) is located at the third floor. We have 6 t/b. But only 4 are being used at the moment. Water pressure on the 2nd floor is a bit low. Whenever I flush the toilet, then turn on the shower, my water heater shuts off due to the low pressure. – could you please measure the flow in any of your faucet? It should be around 5 liters per minute. Minimum pressure must 20 psi. Could you determine the difference in elevation from the tank outlet and lowest faucet in each floor. Then use this equation 1 psi = 2.31 ft, from there you could determine the pressure in each floor
Same scenario with the other t/b on the same floor. Water pressure is no problem on the ground floor. I use it to wash my car. – obviously the pipe sizing design was not adequate. To convey water from source to destination, pipe sizing shall be from large to small pipe diameter. Same as electric cables.
What is the most cost efficient solution?
a. Replace and raise the water tank? (it is a round one that has an improvised cover, not air tight. does it have an effect on water pressure?)- to get at least 20psi on the 3rd floor, you tank outlet elevation must be 46ft above from the faucet. If height is not a constraint, this would be the best solution. It would expensive as an initial investment but cheap on your operation. Since no electric consumption.
b. install a booster pump?- this is an easy and quick solution but would be expensive, due to electric consumption.
Re: Low water pressure
small booster pump and pressure tank just for the showers. That way you only need to pump the minimal amount of water.
Water pressure's dropping in my area as well, I've got an cistern tank to line.. Is there food-grade epoxy available near the QC area?
Re: Low water pressure
My water pipes are all 1/2" PVC. From the water meter its routed all the way up to the 3rd floor to a booster pump and into a 40-gallon pressure tank. Then it gets distributed all around the house.
Without the booster and pressure tank, water flow on the 2nd floor gets down to a trickle if someone uses a faucet on the first floor. Not a good thing when you're rinsing off in the shower and soap gets into your eyes.
Later I found out that I can do away with the booster pump. Manila water has enough pressure to fill-up he tank to some extent. This is enough to sustain the water flow on the 2nd floor. The tank acts like a capacitor in electronic circuits, giving extra oomph when demand is high.
Unfortunately, I didn't know that sometime during the day the pressure from Manila Water gets too low that the tank crumples inwards due to a vacuum effect. The tank eventually got damaged and I had to take it offline.
I haven't gotten the chance yet to replace/repair the tank. Sumisigaw na lang ako ng "tubiiiig" pag nahilam ng sabon.
Re: Low water pressure
the tank crumpled? you mean there was big-time negative pressure from your water mains? someone must be pumping directly from the mains without using a breaker tank. It's illegal because all that negative pressure can cause contamination of the water source.
Unfortunately, it's illegal yet nearly universal. In the course of unclogging a drain pipe I had to have a manhole opened. There, a foot above the drain that sewage poured out of was a length of blue pipe - water supply. It's certain that that pipe goes into contact with the sewage water when it rains, so if and when anyone in the neighborhood turns on a pump, he might just suck sewage straight into the water supply. Yuck.
Re: Low water pressure
the tank crumpled? you mean there was big-time negative pressure from your water mains? someone must be pumping directly from the mains without using a breaker tank. It's illegal because all that negative pressure can cause contamination of the water source.
Unfortunately, it's illegal yet nearly universal. In the course of unclogging a drain pipe I had to have a manhole opened. There, a foot above the drain that sewage poured out of was a length of blue pipe - water supply. It's certain that that pipe goes into contact with the sewage water when it rains, so if and when anyone in the neighborhood turns on a pump, he might just suck sewage straight into the water supply. Yuck.
The meter is a one-way device, so water can't flow back into the mains. So the only explanation i can think of is gravity. Water is flowing out of the tank to the 1st floor faucets faster than the mains can push it up the tank.
Next time I'll install those valves that allow air to flow into the tank in cases of negative pressure.
Re: Low water pressure
The meter is a one-way device, so water can't flow back into the mains. So the only explanation i can think of is gravity. Water is flowing out of the tank to the 1st floor faucets faster than the mains can push it up the tank.
Next time I'll install those valves that allow air to flow into the tank in cases of negative pressure.
Are you sure about that one-way design of water meters? I've been told many times about the meters running backwards during water shortages, due to pumps in the vicinity. I can't imagine gravity alone being enough to crumple a tank.
Re: Low water pressure
storage tank crumples happens because there is no sufficient size of ventilation of the tank to the atmosphere. Fuel tank on cars have vent.
A good example of crumpling is when you drink zesto.
Re: Low water pressure
Hi guys! sorry for the delay. The project was shelved for about a year. But just recently, I finally had the time and budget to continue.
I canvassed for a small booster pump and a 2 stage water filter (sediment and carbon). Then I called up a tubero from sulit. After evaluation, Maynilad water does have enough pressure (30psi) from the ground going to the tank on the 3rd floor, so our pump rarely turns on.
Now upon advise of the tubero, instead of purchasing a booster pump, He will re-route the pipes to partially bypass the tank and feed it to our pipes going to the bathrooms. We may still use the reservoir in case we need it since he will install a valve.
What's good about this is that I can make use of our main pump and set at around 40psi to pressurize our pipes. Or just leave it as is at 30psi to save on electricity.
I will then install the 2 stage water filter into our main line after the pump.
Theoretically all seems well. I will update later.
Re: Low water pressure
UPDATE:
Rerouting of pipes was finished yesterday. we know get a constant 40psi from our pipes. Plus I installed a sediment and carbon filter. Now the water seems to be cleaner. No longer smells like rust. Plus the chlorine was also reduced.
I highly recommend the use of a water filter for the main line as its not as expensive as it used to be.
Re: Low water pressure
If your tank is already on a 12foot platform, I doubt if elevating it further to achieve the pressure you want would be feasible nor safe. Adding a height equivalent to one floor of your house would mean the platform would be more than 20feet tall. You will need to consult the building restrictions in your area. Remember also that 1 cubic meter of water weighs a ton. You will have a tall, top heavy structure on your roofdeck.
I think a pump, pressure tank, and pressure switch is still your best bet.
To those of you who plan to use elevated tanks to improve pressure, note that one meter elevation produces roughly 1.45psi of pressure. You would want no less than 15psi on your shower supply. Lots of people like more than 40psi. Pipes, if installed properly, should be able to take 100psi. But be sure to check the limit of your water heater. My old Champ heaters had a limit of 90psi.
Hope this helps.
Sir,
We have a 14 door apartment on a 3-storey building with roof deck. sadly we were not granted by manila water to have each unit an individual meter so, to cut the story short we have a mother meter and 14 sub meters. we are having problems with low pressure on the 2nd and 3rd floor during peak hours. we are planning on installing in our roof deck a 1000 gallons overhead storage tank with a booster pump at the ground floor, and supply it to the units using a gravity method. energy efficiency is our major concern, because we don't want our tenant to suffer high water cost.
p.s we had our entrance pipe changed from 15mm to 63mm, but our meter is still 15mm. we requested for a bigger meter but we were also not granted.
Thank you sir and hoping for your response.
Cheers
