Hi guys,

I'm having some kind of weird problem that I cannot figure out the source.....

My water tank is overflowing like waterfall dei...not sure if it's related, but it happened right after the maintenance by SYABAS in gombak area (batu caves).

Went to the bumbung to check, panjat here panjat there, found the tangki..opened the tangki, checked the pelampung, ok i think it's time to change the pelampung..damn hard to unscrew it..

So the process of changing the pelampung went well eventually. I thought I have solved it..but after a few hours, started overflowing again.....

Went back to the bumbung, suddenly tengok-tengok, the tangki full (above normal level).. Turned off main pipe, opened some taps to reduce the water level in the tangki..then checked the pelampung back again.. here are some pictures,


1) Checking the newly bought and installed pelampung set... Tangki is being filled..




2) Tried hand-stopping the pelampung, good, no water dripping...




3) Water automatically stopped, meaning no dripping. confirmed pelampung ok..




4) Now the water level still rising, until the pelampung also tenggelam....started overflowing again...




Now i really pening what could've caused the overflowing problem....I suspect it's the non-return valve.. But, well.. i don't know where it is, don't know what it looks like..and too many pipe connection...lol..

Can someone help me pleaseeee....tension gila!



------------------------- UPDATE ---------------------------------

Went back again to the roof, to take some pictures of the pipe connection just in case some one can help pinpoint the problem.

THIS IS THE FIRST TIME I WENT TO THE ROOF, SO VERY THE MESSY...NEVER KNEW SO MANY SAMPAH SARAP HERE LEFT BY THE OLD CONTRACTORS..ISH ISH ISH


1) Is the red circled the NON RETURN VALVE? The black pipe is the main pipe from outside into the tank.





2) Is this too?





If the non-return valve may be the cause, how much would it cost? can D.I.Y ke???? easy?? if can, I might do it myself... hujung bulan no gaji yet...





The flow of the piping:

1)

2)

3)

4)

5)






-----------------------------------------------------------------UPDATE 1ST NOVEMBER 2015-----------------------------------------------------------------


So I finally went to the hardware shop and bought two Check Valve (3/4") size..

Started to operation roof!! While going to the hardware, opened all taps to empty the water from the tank.. Then started opening the first suspected Check Valve.. It was soooo ketat to open had to use extra force.. I thought that was hard, but removing the previous pipe tape (the white tape) was even harder!!!!!

Here's the pic of the old check valve.. I THINK THE SPRING IS NOT WORKING ANYMORE. PUSHED EITHER SIDE, NOTHING MOVED. SO YEAH I GUESS THE SPRING IS NOT FUNCTIONING ANYMORE


Front





Back




And here's the pic of the new Check Valve.. The spring works wonderful..







Changed two suspected Check Valve to avoid double work.. I accidentally left one of the old check valved on the roof, malas nak ambil lagi.. later ambil lah..haha

Cost?? RM30 for one Check Valve (made in italy woi!!), and RM3 for the white tape..total with GST = RM67.30 (IINM)..

This is the first time my operation roof.. Hopefully with the lack of skills, I am able to solve my problem. Checked at the joints, alhamdulillah no leaking or evidence of water outside of the valve.. I hope the connection is tight and secure..

Tank is still filling though. I'll update if it still overflows....hopefully not!!!!! Touchwood!!

This post has been edited by one1002: Nov 1 2015, 02:29 PM

chane to new set. the one in the picture looks old

easiest n cheapest way?

bend the arm downward

and tie some empty mineral water bottle at the end

problem solved

zero cost

put small bucket under the outlet, then wait n see if any leaks at the water outlet.

is that the only piping into the tank?

change what to new set? If the arm set, it is new set. Just bought and installed yesterday... if the bola, still useable, tried rendam in water, no holes no bubbles, so still can use.. =D

Ya, if you see in the picture, the arm is already bent twice.. I bent it before installing.. However, even I bend it further down, it still will overflow, double triple check the pelampung, no water leak from the main pipe to the tangki, ceiling is not wet, no water dripping from the pelampung.. anyway, i tried your suggestion, same thing haha..


Hi, thanks for the reply, unfortunately, there are no water leaks. I went around the tangki, bend downwards to check for any water residue on the floor (ceiling), nope..nothing..no leaks confirmed!

For the connection, I have updated the photos in my first post.

This post has been edited by one1002: Oct 25 2015, 12:20 PM

bend it more like up to 60^ angle

since it doesn't have any adjusting screw, that's the only way to do it

or you can open up the valve and change the rubber diaphgram inside

that round rubber thing is only 50 sen at most maybe

ah, since you showed the 1-way check valve, i know your prob liao

the check valve got problem. u try to switch off the bypass

i see you have a bypass system. very clever

did u change the bola pelampung or not, it looks used

the check valve is around rm 20. depending on size.

usually, this type of check valve, the spring inside corroded and not strong enough to push the plate to close the valve

thus water gets into the tank from the check valve itself

This post has been edited by lucifah: Oct 25 2015, 12:20 PM

Could you please tell me while the water overflow, where is the water source into the tank?

That pelampung did you chage together the valve?

Lol, i no idea what you talking about hahaha..still learning... Check valve = Non-Return Valve = Red Circled in the picture??? Same thing? How do I switch off the bypass?

Sorry Lucifah for asking these, trying to learn few things before I call plumber...hahaha..

Nope, used back the bola.. Bola still useable..sudah rendam dalam air, bounced back like gila high..so still can use..check for holes or leaks, none found! =D

This is what I suspect too...so I think better to change the whole set of valve right?

Hi, this is the reason I created this thread. Because I myself cannot figure out the water source into the tank (after the bola pelampung has stopped the water inlet). If you notice on my pictures in the first post, the pelampung set works wonderfully well. No dripping.. So I think, there must be some back-flow water coming back into the tank..hence it's overflowing.

Unfortunately, I have very very very limited knowledge in plumbing works..still learning..googling..etc.. =D

Bola pelampung is still usable, so I did not change it..just the arm.. In the first picture, the brass (tembaga) thing is new..made in England tau..haha

i saw your pics got 2 check valve and 2 outlet pipes, so ayam confused why you have two

need to understand how your piping flow is baru can give idea

last time i got this problem to..in ma toilet...change pelampung also same ...problem is inside the 1st pic got 1 rubber part worn out aready

OK Lucifah, I have prepared the piping flow for you..haha

1)


2)


3)


4)


5) The overall layout

I think 1st picture with red circle is the problem

It fails hence water back flow into your tank.

I think your problem is on the 1st 2 pic with the red circle. The steel pipe is suppose to be the outlet and the black pipe is suppose to be the inlet? (If i see it correctly)

How can inlet and outlet be connected. There should be only 1 inlet to your tangki that is the one connected to the float. If you need another inlet connection to your tangki, then it should end with another float.
if your outlet also connected to the inlet, for sure it will over flow becos no safety cut off.

Is that a new connection? The red circled joint.

TS,

you did 2 bypass for master bedroom and ground floor correct?

cheap solution is to reduce the water pressure from main intake outside the house (near syabas meter)

expensive solution is to change the non-return valve to a higher/better grade.

I suspect the problem is caused by increased water pressure from syabas main which affects the return valve..

you have two outlets which have the check valve

either one may caused the problem


this is a spring check valve



i always prefer a swing type check valve



the spring check valve got a plastic disc attached to the spring. like some forumer said, the backflow pressure is too strong that it pushed the valve open

This post has been edited by lucifah: Oct 25 2015, 05:29 PM

pakai level sensor lah...abis crita...