It depend on the water quality within your area. Apart from the usual dirt and mud which will accumulate with time, so cleaning is done in one shot. Anyway it is good practise to just do some preventive maintenance which costs roughly RM100 every three years to clean and check the float, lingkages etc

good one bro
just checked, beam-beam height is about 10 ft. 0.07 bar difference with yours. Should be bearable. Still, decision on my hand now
if install pump 3 or 5 years later, that time piping connections may be "aged" and lagi cannot tahan pressure surges? depends on workmanship today, is it?

bro, not 0.07 psi difference but 1.02 psi dfifferences..

for your case....just use water heater with pump for upper storey and downstair...let say you want install pump later..then just install the pump...

for me....i not keen on pump as later after few years using....there could be water leaking due to high pressure of the pump...

This post has been edited by tomjason: Apr 26 2012, 10:16 AM

since this topic discuss about pipe and i am facing underground water leakage. can u guys recommend me any good plumber in town?

@ozak: what kind of check valve you using? Brass swing check valve? Checked with hardware shop, 1" approx. RM20+ per pc. not expensive. "i” brand. can't find other brand. any recommendations?

There is no need to go into calculation. The formula times this divides by this etc and getting the calculated result and to understand if it is sufficient is a headache itself. It makes little sense with figures like how many psi when you are not sure how many psi you require by your heater or your preference.

Simply work on the height and pipe size will do:

1. The higer the location of tank the greater the water pressure at the bottom of the openings (taps) regardless how much the tank water holds. It can be a big tank or a smaller tank when they are at same height the static pressue are the same. The height of the tank no doubt has higher pressure but by a few feet (maybe just 2 feet). You put the smaller tank higher by 2 feet the pressure is same as the taller tank.

2. The smaller the opening the higher the velocity of water given that same static pressure. It is therefore better to have a one size larger pipe before the end tap by reducing the pipe to accept the tap. eg. 3/4 inch pipe all the way till the tap with 1 inch connection.

This means, try to put the tank as high as posible at roof top and size the pipe make sure the total output of the opening tap is smaller than the supply pipe size.

Given a double storey house, water from tank cannot give good static and velocity presure to the 1st floor bathroom as it is not high enough. Therefore, a pump is needed or if you use instant water heater it is advisable to have a built-in pump.

As for the ground floor bathroom you can choose to have a shower head with tiny little holes to increase the velocity pressure if the instant water heater has no built-in pump.

For instant water heater without built-in pump one other way is to feed the water heater from direct main. Direct main presure is much greater than the pressure from the tank othewise it cannot fill your tank.

In short:
1. To feed your heater from tank buy heater with built-in pump or
2. feed directly from main. And
3. have a pump at tank feeding all the bathroom. With a centralised pump you do not need to bother the sizes of the pipe as this high power pump can give you more than enough pressure (static or velocity) even with half inch pipe all the way.

This post has been edited by stevie8: Apr 28 2012, 02:09 AM

There is only 1 type. I dont no how does swing check valve look like. Any brand will do. Check valve is very common part. Just like pipe fitting part only.

i " brand u mean itap ?

http://www.itap.it/valves-for-heating-syst...heck-valves.asp

seems like this is the only check valve.... ppl are selling seems to be branded too

bought YORK, itap's. cannot see any other choice

Sorry, noob here.

So, blue color pipe is ABS and light grey is PVC? If pipe is install not underground (from main) but expose to sun and rain, which one is better and more tahan lama? Polypipe is black color?

I am planning to install simple water filter to filter dirt and rust especially from main. Just follow stevie8 method

This post has been edited by Skydrop: May 9 2012, 09:30 AM

There is no much different between the three. They will last you yrs after yrs.

For filtering dirt and rust get 2 or 3 cheap filter housings connect them in parallel.

Thanks for reply. I think I will go for PVC as I read more, this is better and more recommended by many sifus in LYN

I will get the plumber go measure the water pressure first. Went to check out the main pipe and water meter... scary. Not sure how to fix the filters now I stay in apartment.

I only know plastic pipe. How do you tell which is ABS and which is PVC? They all look the same to me.

Color is different and ABS is harder and cannot be bench, PVC is more soft.

So what color is ABS? And what color is PVC, grey, right?

ABS is more "hard", not as easily bend as PVC.

PVC normally come in grey colour.

You can tell the difference by bending the pipe, one is easier bend than other.
You see more "straight" in ABS pipe in the storage for the same length in both are stored together.

Abs = blue color, pvc = grey color.

Both pipe (with sirim approved) almost same price, abs fitting price higher. THose pvc sold in hardware shop without sirim much cheaper but lower quality.

Abs alto harder, but easy to break/ crack @ T joints n bend.

Previously, abs is the only approved cold water pipe for internal piping by syabas, now pvc r approved due to the above…

Hi Stevie,
Sorry, I am a newbie here....
Have some questions and hope you can help to answer:
1. Incoming pipe before meter= 3/4", into meter=1/2". Would it be logical to use 1/2" pipe from meter into the house? What I mean is, since the pipe going into the meter is already 1/2", and if we use 3/4" after the meter, the water pressure will still be the same regardless of whether we are using 1/2" or 3/4"?
2. looking at item num 4 and 5, what type of pipe is normally used? is it pvc or poly?
3. Any difference btw grey and white PVC?

Hope you can give some advise.

Thanks.

Hi BM81,

Would like to share some understanding and experience I have on some of your questions. Other sifu's are welcome to correct me if I'm wrong.

Q2 - Usually PVC is used (Grey colored). For your own home get the thick one. Some people like to use Poly (black colored), it is durable, alot of farms use them for water piping but their fittings are more expensive. If you decide to get Poly then make sure it is SIRIM certified.

Q3 - PVC (Grey) and uPVC (White) difference can be checked out here: http://www.ehow.com/list_6861864_differenc...-pvc-pipes.html.

Basically you can use either one, your preference. However in Malaysia most use PVC (grey) for most of the piping and uPVC (White) for gutter and toilet plumbing.

Thanks a lot bro abitnuts