I ordered Grundfos CM3-5PM1 from Zean, destination send to Sarawak, Miri. I received a quotation from Zean to a huge surprise, hard to believe that 13kg of shipping fee was excluded from the selling price. I made a giro payment to him on 20/06, Friday then received the water pump in good condition on 24/06, next Tuesday. Indeed second to none in efficiency!

My both neighbors were amazed to see how silent and powerful of the pump. One of my neighbor is using Hitachi pump and he complain about very noisy and quite shaking until he switched it off and choose rather not to use it again. Grundfos is very expensive at Sarawak, Miri. Could be the vendor thought everyone is earning a big bulk and working at oil & gas line. Moreover also could be Bruneians, they buying power is 2.5x of our ringgit Malaysia. For the same model, the price range I can find is from RM 1750 up to RM 2100, exclude the installation charges.

Anyhow, I am pleased to say that Zean is very efficient, friendly, trustworthy character and true as steel! He is a credit to his profession.

Zean, just now i am facing the pump is nonstop working when an electricity resume back from the blackout
What is the proper way to reset it ?

This post has been edited by swgiant: Jul 14 2014, 08:38 PM

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.

Yes, i switch off when i am traveling or away from home for few days.

I believed no bladder tank is installed on top of his CH4-40PC. besides that, CH4-40PC & cm3-5pm1 cant adjust the pressure.

when nobody is using the water, the pump is not running and quite for whole day. besides that, i do not spot any wet water mark. The initial pressure dropped instantly even i just turn off the faucet and turn on again.

Yup, I notice a pressure drop before pump kick in. Since you have the same case as mine then i assume everything is normal as the pressure drop is not that much.

if your water tank is located at ground floor backyard then please take cm5 as more powerful to push the heavy weight of water to upstairs! Currently i am using cm3-5pm1 for my double storey house. If nobody is using the water tap, then i am happy with that pressure in my masteroom or the piping structure in my house are poorly designed.

Grundfos cm3-5pm1 has overheat protection or not ? My family noticed my grandpa has a symptom of alzheimer disease. Recently he tends to forget to turn off the water tap, it happens quite few times already. Luckily, we detect earlier and tank's water only left one third.