i bliv u r not satisfy with the pressure, thatz y u are asking in this thread?

turn on the water, test the heaters. If u r not happy with it, the answer is to get a water pump

PMed

FOr normal landed houses, it is quite impossible for water to be too weak until the instant heater pump could not start. As all houses are using tank's water, hence all houses would have +- the same pressure (Gravity pressure). Few possibilities

1) Old house with clogged pipes
2) U install a rain shower system for your instant heater
3) Filter at the heater is clogged

This post has been edited by zheilwane: Sep 29 2017, 03:44 PM

best to have a tank but most condo do not have a tank,

Grundfos Scala 2 would b good. However, if your unit is at the 10th floor, pressure should b quite strong unless 10th is the highest floor

Price Joven win,
Reliability, pressure and quality GRUNDFOS

DOnt think u can find any good reviews for Joven pump, they are OEM and JOVEN is actually specialist for heaters not pump but Grundfos is the specialist for water pump

This post has been edited by zheilwane: Oct 17 2017, 09:51 AM

pump has to be installed before water filter.

1) THen u will have strong pressure to backwash the filter
2) If after filter, the filter will reduce incoming pressure further, hence less water for the pump to boost

the pump controller spoil d, get some1 to check. If under warranty, quickly call the customer service

THat would be CM5-4PM1, market rate is about RM 2100 - 2300, u can check mudah, lelong and many other sites for price reference. Ofcoz it is still possible to get slightly lower than the online prices but for budgeting, u can use them as benchmark


This post has been edited by zheilwane: Jan 29 2018, 02:24 PM

if ur main your main water supply is 2.5bar and above u can go ahead without a pump

1) this only happen for PT (with a tank), PM should not have this issue
2) If the main water bypass is ON and ur incoming pressure is quite strong, the pump wont kick in until pressure drop to certain level (hence u nd to turn on two taps) if that is the case, turn off the main water bypass valve
3) May b PM is faulty

turn off your water meter and test the showers, if that resolves the issue then turn off main water bypass

If you have photos, can snap and share here for us to c and advise. Photos of the pump, the piping and etc, further angle for us to see the installation.

also check at the controller got LED light or not.

Grundfos has 2 years warranty, if more than 2 years then can get my technician to fix, cheaper than grundfos

This post has been edited by zheilwane: Nov 27 2018, 10:10 AM

should install a ball valves right after pump outlet, check whether they did a main water bypass or tank bypass for you

looks like my plumber's job bought from my shop?

Rarely plumber use such good quality fittings gkent ball valve exp, stainless steel union also exp. italy non return valve

This post has been edited by zheilwane: Dec 22 2018, 08:13 AM

never heard of this brand, google search for more info, it is CThardware own in house brand. So it is OEM in china

"CT Hardware’s affordable yet reliable mantra, the Welflo brand booster pumps is part of our in-house brand" copied from website
https://www.cthardware.com/blog/welflo-booster-pumps/

To compare grundfos with Weflo is like saying Proton is as good as Mercedes but cheaper price

grundfos is internationally well known for low noise, durability and powerful. For 3 normal shower heads u can actually get CM3-4pm1, however if u love strong pressure can get CM3-5pm1 as well since price difference is only RM 30.

Stainless steel impeller is definitely better than composite in terms of durability and noise level.

compare EBARA AM8 VS Grundfos CM3-5pm1

If u r looking for pressure, compare the head
39.7m (ebara) vS 46m (grundfos)

so is about 3.9 bar pressure vs 4.5 bar

energy consumption Ebara is 600watt vs Grundfos 500watt. Grundfost is more energy saving.

However, many customers like to compare HP (horse Power) which i think is not accurate, u need to compare Flow & Head not HP.
Since Grundfos is more energy Saving, kW is lower, hence HP is also lower as well but the HEAD (PRESSURE) is higher = stronger.

HP = kW x 1.34. So Ebara will b 0.8hp while grundfos 0.67hp, however in actual spec grundfos is stronger. Hence it is not accurate to judge a pump by HP or KW

How much is the EBARA pump? i tried to google online cant find pricing, grundfos is RM 1330 by my shop

This post has been edited by zheilwane: Feb 16 2019, 10:40 AM

there is a risk but u cant tell until u install the pump, wan something reliable and affordable, TERAL (japanese brand) most cheaper pumps are actually OEM in China but they put GERMANY or Japan or Italy which is very misleading.

If u google Teral Japan, u can c their HQ and factory, really japanese brand. HQ & factories listed as per website. Truly japanese technology
https://www.teral.net/e/corporate/overview/


I tried google Kawa, all source from malaysia only hence i assume it is malaysia brand import from china and rebranding. From their catalog it says JAPAN technology, misleading. Cant even find their website to check on more info.

This post has been edited by zheilwane: Feb 20 2019, 10:22 AM

yup, ur plumber suggestion is right. TO save cost, get the pump yourself as plumber usually mark up 20% profit for the pump, only pay for his labour fee. U may get his price for the pump and compare with my selling price to know how much u can save

This post has been edited by zheilwane: Feb 23 2019, 11:22 AM

depending on how u install the pump, budget got budget way to install (just connect in and out), professional got their method and additional fittings as well (bypass, non return valves, stainless steel union and stainless steel ball valves). Where u purchase the pump. u usually u hire their ppl to install or your contractor, then u can ask them in detail how they gonna install it also what is included.

sample photos as shared by winsontay & white lighter above is a RM 300 vs RM 550 job


Pump cover i have for CM3-5pm1 type, if Pressure tank type may b u nd to self customer made

This post has been edited by zheilwane: Feb 25 2019, 11:11 PM

could u snap some photos of the ground pump installation? to double check is not installation issue? wanna c the tank/filter/ pump and pipes, so snap from further + few angles

By right if it is installation issue, the technician should be able to advise as well. But best to have photos to share with forumers as well

Durability wise, CM is more durable than scala2 but scala definitely can last for years as well, given 2 years warranty + 6 months extended for online registration, if keep on breaks down grundfos will b making huge losses as well.

This post has been edited by zheilwane: Mar 25 2019, 10:04 AM

Filter install before tank, ensure water in the tank clean. However water pressure weak, u wont have pressure to clean the membrane. SO installing it after the pump is better.