Actually it is kinda simple, turn off your main water supply and check the bathrooms or taps, if there is no water flowing out = it is main water supply.

Water pumps are installed next to water tank to boost the water pressure, anywhere that is using tank water supply will be boosted, main water supply usually is strong or moderate but tank is definitely weak.

CH-PC discontinued quite some time already, now is CM-PM.

Grundfos is a well known brand for performance and durability. I bliv many ppl think so as well that is why there is only discussion for Grundfos instead of other pumps


Normal household pumps are not strong enough to burst our standard ABS pipes. The reason why a few percentage of houses have leaking pipes after installing the pump is because the pipes were not connected properly, it leaks or burst from the joints not from the pipes. If the pipes where not connected properly even the weakest pump could cause leakage. A normal flexible hose connected to toilet bowl or bidet can withstand the pump's pressure, why cant a thick and solid ABS pipe withstand the pressure?

We are selling Grundfos pumps and cases like this only happens 1 - 2 times a year, rarely happen for new housing area. For new housing area, if pipe burst after installing pump, you can claim developer as DEFECT but not all developers allow you to claim.

You can also double check this with your friends or families using Grundfos. Dont worry and happy renovation Do get your stuff quick as currency dropping, suppliers are increasing prices

This post has been edited by zheilwane: Aug 20 2015, 10:19 AM

no brand for RM 1600... can get grundfos d

A grundfos Pressure Control will cost estimated RM 400-500 not really sure need to check but best to know what is the problem first before changing anything or else might waste $$

pump hot = over heat = running non-stop = pipe got minor leakage (70%) or PM faulty (5%) or air-lock (25%)

above the pump water inlet there is a nut, open it and let water flow out for 10sec, then tighten it back. Rmb to turn off electricity first and get a cloth to wipe the water

You sure you wan PT? PT = pressure tank = need pump air once a year.

PM me the model you wan, if you dont know which 1 to get. PM me your number of bathrooms and what type of shower you are using, Rain shower/normal instant water heater/long bath/ jacuzzi

Recommended to put a tank at ground floor and then only install the pump. However, most customers do not have the space, you can also opt to install the pump direct without a tank but you will affect your neighbors water pressure and if there is insufficient water, you will kena air lock frequent.

a small pump will do either Grundfos CM3-4PM or Teral AB25x254. Currently We are having Promo for Grundfos CM3-5PM only (will be cheaper than CM3-4PM). Best price for Grundfos is only for walk in customers. Sorry cant quote the special price online

Are you using a membrane water filter? If yes, you can bypass it and c whether the flow is acceptable, if yes, then just change your filter.

This post has been edited by zheilwane: Apr 6 2016, 04:05 PM

After installation, ask ur plumber wait 5 - 10 minutes next to the pump. If the pump does not start = no pipe leak = safe to leave it on.

My previous house about 15 years+ with GI pipes got minor leak bt we couldnt find the source, so we only turn on the pump when we need it.

New house, no piping issue, we leave it on 24hr unless during vacation we turn it off.

This post has been edited by zheilwane: Apr 6 2016, 07:20 PM

PM you d, good time to buy now as we are clearing Grundfos CM 3-5PM1 only 1 , limited to 50 units only

This post has been edited by zheilwane: Apr 13 2016, 04:07 PM

If you wan strong pressure = u need pump = you must take risk

No other method, my old house also >10 years, we install with minor leak only

From what i know, there is no way to test

CM3-5PC has been discontinued and replaced with CM3-5PM, pressure same. If dont wan so strong, get CM3-4PM.

Option 1 : Add 1 tank at ground flood and install a pump here as well, this will boost your kitchen pressure and fill up the tank above faster.
Disadvantage : Waste space and extra pump $$.

Option 2 : Do an external piping from the pump sbove your roof to your kitchen.
Disadvantage : Some customers think it is not hygienic . .

We are having SALES for Grundfos in-conjunction with our POST-EXHIBITION SALES on 14 and 15 Oct (2 days only). We are not allowed to quote prices online and through phone, offer price is only for walk-in customers.

it is like a all for 1 pump, negative suction, main suction and etc etc. For standard installation, install next to water tank, actually there is no need for scala2, the regular CM-PM is already sufficient.

Don miss out our Post Exhibition Sales 14 - 15 Oct (2 days only). We are not allowed to post any pricing online or quote prices through phone. All special prices only for walk in customers

This post has been edited by zheilwane: Oct 13 2016, 09:33 PM

dont need setting, all pre-set already. This is an expensive pump, do get some1 professional to install if not will be wasted bro

nope cant do so. Actually even i m only using CM 5-4pm1, dont wanna maintenance, so far so good, dont really need the VSD

unless big houses with lots of bathrooms then UNI E is the best choice

This post has been edited by zheilwane: Nov 13 2016, 07:45 PM

herm, regarding pipe bursting, notice many customers and forumers asking about this. If you ask your friends or families, i bliv most of them do not have issue with pipe bursting, in fact i have been selling Grundfos pumps for more than 10 years, the number of cases pipe leak not burst is less than 10.

How to size your pump?
1) not by HP but most contractors or plumbers do suggest by HP.
Different brand with smaller HP could generate higher flow rate and pressure. HP is just the motor electricity consumption not the actual performance of the motor, using the same motor but having more impellers could increase flow rate. Grundfos CM3-4pm1 with 0.7hp could pump 3.7 bar but CM3-5pm1 with 0.7hp (same hp) can pump 4.6bar

2) how many bathrooms and what type of shower system?
You can have 5 - 6 bathrooms but only using 4" hand shower, a grundfos CM3-5pm1 is sufficient (max output 70L per minute), a normal hand shower only require 6-8L per minute. However, if you are using 10 or 12" big rain shower heads then you will need a stronger pump like CM5-4PM1 (105L per minute)