QUOTE(Johannlo @ Dec 31 2014, 03:02 AM)
Update.
Checked pipings, no leak whatsoever.
Called handyman come over to have a look and realize that the return pipe automatic valve gave way already. So the pump keep sucking out water from tangki and pump it but the water flow back to the Tangki after that therefore creating an infinity loop. The handyman went to close the return pipe stop valve and solved the problem.
Sifus, any consequences of disabling the return pipe?
QUOTE(ozak @ Dec 31 2014, 09:13 AM)
I guess it is the check valve problem. Just replace it. Not expensive part.
Thanks. Learn something new here. Yes replace it but with a reliable one made of brass like York (from Italy). They are called
check valve or non-return valves (NRV). This one is available locally. Ask your plumber.
From
here assuming if the pump is using 1.25" size check valves about RM48.00. Smaller (1" or 3/4") cheaper.
OTOH, you know realize that the NRV was the weakest link over time. If the NRV replaced is very durable then hopefully most unlikely because it's new piping but there's a small possibly that something else may give way over time. That was my experience with water pumps. Convenient yes but my old plumbing gave a lot of problems. Normally if the piping is durable it should not happen.
In my case, I should have re-piped the cold supply completely which means hacking out. It was first the water hammer, then toilet started to overflow until I replace the WC inlet filling with brass type. Then one day after two years, I started hearing pump running over time even when no one was using. Even after turning off, it was not until we started seeing abnormally high water bills then I realize an unseen leak developed somewhere.
A family friend's plumber did this simple detective work:
a. turn off pump
b. shut off each bathroom stopcock
c. shut off roof tangki stopcock and just before entering tangki isolation valve (if any)
Then turn on and off in order:
a. roof tangki stopcock only. Keep before tangki isolation valve closed (do not allow water filling into tangki)
This detects leak post water meter but before tangki ie embedded pipe from water meter into the house which means kitchen or backyard laundry. One of my friends in KL suffered this kind of leak which is indicated by the water meter running very fast. If not leaking (water meter not running), then the leak did not develop along this segment.
b. For each bathroom (one at a time) - open stop cock. Check for leaks. Turn on pump, see if it still runs after the initial prime. Shut off and repeat until all bathroom has been checked.
In my case, the pump continuously ran when the master bath stopcock was opened. It was not leaking from any of the outlet (bath, basin, WC) but he deduced that a branch out from the master bath to an closed off unused point at the front yard pillar tap was the suspect.
This post has been edited by halcyon27: Dec 31 2014, 02:35 PM