When google can you get information?

I am thinking to install water pump and then change all current PVC pipe to stainless steel.
Not sure how much it will cost...

question: i am comparing costs at them moment. if i buy a s/s tank + pump i will have to fork out min. 3.5 to 4k incl. installation. has anyone considered (or installed) a pressurised (membrane-type) tank instead (i.e. no need for pump). price for 300 l tank (volume 150l) is around 3k from grundfos and this would allow you (or me) to store the water sealed totally hygenic and with the incoming pressure from syabas (when go better pressure it will also be "stored"). so if low pressure tank will kick in with the better pressure, if no power also no problem and if no water i have the reserve water.

anyone ever thought about it? it seems actually almost cheaper and you only have to check pressure once every two years or so and increase (just like the small tank on the pump). then can last 25+ yrs.

I only change pipe from PVC to polypipe from meter to kitchen and meter to tangki.
From tangki onwards still PVC.
Within bathroom also changed to Polypipe.

Didnt pass thru living room, all goes up to roof.
that's the disadvantage for future modification. but potential leaking to plaster ceiling.

Seriously anyone how 0.75 horse power pump can create how many bar of pressure?

i have considered that (see the other post). unstable pressure or lower pressure than desired can be easily overcome with a one-way valve. that way i can benefit from whatever the maximum pressure is that syabas can provide during the day. in a way the tank would even out such variations.

Regulator?

when i turn on the faucet, the starting pressure is low and delay for 1 second then after that water pump pressure come in, by the way my friend has CH4-40PC, the pressure come in immediately once i turn on the faucet but why mine unit has the problem of delaying for 1 second ? Is that a normal case for grundfos cm3-5pm1 ?

but my friend didnt install any bladder tank and yet his water pressure is constantly good.

but what kindda summon...later scared he kena tarik to court or sumting..

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?

interesting. since the plumber disabled the return pipe from grundfos to tangki cause of faulty NRV, and I do not intend to replace the NRV yet, will I face any potential problems in the future?

what's the use of this return pipe anyway?

it possible to install water pump direct after water meter??? with dry protection system and flow switch to prevent pump run dry.... tq

I heard of dry pump protection. But recently I heard a friend of a friend had a burst pump the other week. And was told that the water system over pressured and she should had let turn it off when no used.

I find it odd as I understand, pump are automatic turn on and off trigger by pressure diff, is this true?

The water technician. Indeed it is pentagon type, but heard can use the normal allen wrench, just a bit troublesome.

ozak any idea what size is it?
i need to take picture, but mine is installed upside down so bit hard.