zheilwane,

any recommendation for water pump need to be put on concrete slab on top of the roof? is there any casing for the water pump?

Please recommend me something for 3 bathroom.

You can go for Grundfos Cm3-5PC. However, you need to ask ur contractor to build shelter for the pump or some of my customers get a stainless steel tank to cover the pump

zean, the pump is power thanks

Yeah, Grundfos's pumps memang POWER Now u can enjoy your shower.

and pay extra water bill,    power mean use more water  

Yeah, Grundfos's pumps memang POWER Now u can enjoy your shower.

Is it possible to install water pump @ low rise apartment. My unit located at 4th floor which is the uppppppest one.

Water pressure too low. Arhhhhhhhhh tensen2

Zheilwane,

I just bought from you on 1 Feb Grunfos CM3-5PC at your shop.

Please call my mobile urgently. I will PM you my mobile...URGENT!

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Added on February 4, 2012, 9:37 pmZheilwane I have PM you. Please check. urgent!

Just a quick question, where did u purchase the pump from? The seller cant help u? You should really buy from some1 who is professional and could give u good advise. For example, if ur plumber has done the piping as per ur photo, you will have some problems after the installation....

a) The most important thing, you need to install PVC unions as per grundfos requirements.

b) If cold water is boosted by the water pump while the hot water is using water tank's water, your hot water pressure will b much weaker than the cold water. So, when u r showering, you will feel the water is not hot enough as u r getting more cold water than hot. Therefore, the tank's outlet should go into your pump then split to ur heater and down to your bathroom. By doing this, you will have same pressure for both hot and cold.

c) The pump by pass is wrong. Imagine u r using 8-10" rain shower but ur pump is out of order, so you will b using the pump by pass. However, the water supply is from the tank, do you think u will have sufficient water pressure to power up the rain showers? You should do a main water by pass instead.

Here is how the installation should look like


Hope that answers ur question

regarding the NRV , how good is the "seal" ?

usually the pump pressure is higher than incoming.. one..

if the NRV seal isn't good.. the meter run terbalik and get no water at all ? or its somehow equalize ?

cause im planning to do a "auto-bypass" for pump when got power trip/no electric..

My 1 insall since day 1. Never change before.

I install it after the water filter, tap and meter. So when change filter, I have a chance to know is the seal working or not.