yeah been doing tons of research on pumps since planning to get one...

my flowrate, i was refering to "tap" not pump as pump's one can get from grundfos website the technical specification...

i check out some documents regarding what is the nominal flowrate for taps and sorts for malaysia but found nothing on syabas website and come across a very interesting article/documentation/guide by singapore's PUB..

http://www.pub.gov.sg/wels/Documents/Revis...equirements.pdf

they rated norminal tap flow rate should be abt 6 liters/min (in another words , on tap to the max, in 1 min should output/give about 6 liters)

from what i've read so far, the "ideal" pressure for home should be about 40PSI = 2.80 Bar = 280KPA

i'm guessing a double story house is about 30 meters the CH4-40 @ 30 meter puts out abt 0.5 / 0.6 liter a second , that is you pump UP from a ground floor water tank.. but if ur water tank is on the roof .. i'm not sure how to see or calculate

so 0.5 liter a second = 30 liter a minute.. so for a nominal tap flowrate of 6liter/min , CH4-40 will give you support for abt 6 open TAPS maybe minus 1 or 2 taps, if got shower rain/rain shower...

ps : this is my opinion and based from what i've read and understand and calculated, ONLY , i don't own the pump YET.. , those that have actually used it can give a better insights...

This post has been edited by JinXXX: Apr 15 2011, 02:22 PM

wow, r u an engineer? I m amazed with ur research. Actually quite hard for consumers to calculate and factor in friction loss, gravity and etc. I went to many houses and tested Grundfos CH2-50PC, the pump is very powerful. SO, if u trust me, get CH2-50PC would b more than enough for most houses

Direct from source usually the pressure are very high. My current house is double story, the direct pipe to top floor is very strong.

Some house get weak pressure because the incoming pipe already got build up inside. Or installed sand water filter which some brand (older version) reduce the pressure to ensure the tank don't burst.

I am concern dont know where bocor and after down stair ceiling start having stain. Experience once when I renovated my toilet. Idiot contractor told me no need water proofing. Then start seeing stains on ceiling downstairs. Called him and came once to fix but didnt stop . Subsequently dont pick up phone. Have to call another contractor and told have to re tile with water proofing. Almost double my cost.

So coming back to waterpump, seems its true and only way is to change pipe...

Hi zheilwane,
1. When water pump is off, is the water supply will stop or it will still flow but without the water pump pressure ?
2. Can you give me your shop location and business hour?

Thanks

1) When u turn off the pump, u will still get water but without pressure. Usually a good plumber will do a main water by pass. For more info, u need to drop by my shop

2) My shop is in kepong, click on my signature below.
Business hour is monday - saturday, 9am - 6pm

zheilwane - draw 1 siap siap for me gonna see u next month. Painting almost done...

time to get water heater, water pump

I have many copies here ahhaha, give it out for FREE to our homedec customers last year.

bro how long is the warranty?

2 years now, previously 1 year

Hi,

I have two bathrooms upstairs and 1 bathroom downstairs. I do not have any rainshower as well as all three bathrooms will be using instant water heaters. There is one dry kitchen and 1 wet kitchen. Should I be using Grundfos CH2-40pc (0.50hp) or CH2-50pc (0.75hp)? I was told if the hp is too great for the house, there will be leaking problems.

Can advise?

You will not have leaking problem unless ur plumber did not connect the pipes properly. If they did not do a good job, a low HP pump will also cause a leak. There are bunglows using 2HP pump and there is no leak, so there is no reason that 0.75hp or 1HP pump can cause a leak.

Just get CH2-50PC as the price is RM 10-20 more exp than CH2-40PC only

May I know where is your shop located in Kepong? Do you have an email address I can send my pricing request to?

For pricing, please join us in facebook n PM me. YOu could also view our promotion album after joining us in FB
http://www.facebook.com/profile.php?id=100001245528914

Here is my location map
http://maps.google.com.my/maps?f=q&source=...4,0.001725&z=19

Hi just wonder hows the electricity bil after using this pump?

the pump only consumes 0.5-0.6kW while ur water heater is 3.6kW. If u do not turn on the water, the pump will not operate and it consumes very very little electricity.

I heard there is a new series of models from Groundfos coming into the market. Is that true?

yes CM pump to replace the existing CH pump

will be cheaper or priced around the same ?

should b the same

This post has been edited by zheilwane: Jun 8 2011, 07:50 PM