Mitsubishi WP-305Q3 water pump short cycle/tank full of water issue

[mran66]

Hi

 

I have above mentioned pump in my house, normally run it only as backup when pressure in city water system goes off.

 

However the pump have an issue that when in use, it starts and stops all the time, making it both annoying because of noise,

but also very hot after some use. I emptied the tank couple of times by removing the plug on the side, after which the pump

works "normally" for a while. However, after a while goes back to the short cycle again, tank full of water. Take the plug off and

let water out it goes back to OK again for some time (days/weeks, not really followed for how long)

 

Anybody have any idea what could be done to fix this - is there a set of seals or other parts that are likely to be damaged

causing this and could be replaced easily? Or something wrong with the tank (possible bladder inside?)?

There is no valve outside to put pressure in, so I guess there is a pre-filled bladder inside.

 

thanks

[BEVUP]

Just a guess, but I think it might be the wrong type of pump

 

Man over the rd had one put in (I think it was a Lucky ?????? brand ) 6000 all up

[BEVUP]

The pump you are using is for the household pressure side

 

Google Lucky pro (english ) & look at Circulation pumps 

[mran66]

i think this is just a normal pump used for households to get pressure to system either from tank or city water. I have city water and storage tank, basically only use this pump when need water from tank city water being off. I would expect there is a leakage somewhere that lets the tank to get filled by water from city system pressure over the time, just wondering if anyone would have had similar issue with this pump hand having got it fixed by fixing something rather than buy the whole new pump. 

 

My use is rather infrequent so dont think I would buy another one as long as this works, but would prefer less start/stop cycle when in use. Also expect the constant start/stop might one day burn the motor.