[WTA] Grundfos Water Pump, CH-PT or CH-PC
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 Dec 15 2020, 03:01 AM
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#1
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Senior Member
1,332 posts Joined: Oct 2005 
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Hi guys, New double storey house here. Water pressure very low at upstairs bathrooms. Currently all 3 bathrooms (1 with rain shower) connected directly to water tank only. Was advised by contractor to do bypass first before adding pump. But im thinking to straight get a water pump + bypass. Any suggestions on pump models and installations procedure? Welcome to pm me if any plumber or pump seller.
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Dec 15 2020, 10:53 AM
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#2
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Senior Member
1,332 posts Joined: Oct 2005
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QUOTE(turion64 @ Dec 15 2020, 03:01 AM) Hi guys, New double storey house here. Water pressure very low at upstairs bathrooms. Currently all 3 bathrooms (1 with rain shower) connected directly to water tank only. Was advised by contractor to do bypass first before adding pump. But im thinking to straight get a water pump + bypass. Any suggestions on pump models and installations procedure? Welcome to pm me if any plumber or pump seller. Guys, this is the installation diagram proposed by my plumber for bypass + new pump installation. The pump will be CM3-5 PM1 supporting 3 bathrooms (1 with rainshower). It's a new house so will take the risk of the higher pressure pump. Is this setup ok? Attached thumbnail(s) 
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Dec 16 2020, 09:51 PM
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#3
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Senior Member
1,332 posts Joined: Oct 2005
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Hi Guys, Just got my water pump installed. Have decided to go with CM3-5 PM1 and add on Pressure Tank from my previously kaput Grundfos. 2 Bypass was made. 1 Bypass from water tank and 1 Bypass from main water inlet. So if Pump malfunction in future will still have water with decent pressure. Pump was supplied only by single source : water tank. Any comments would be highly appreciated. Thanks! Attached thumbnail(s) 
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Dec 17 2020, 01:55 AM
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#4
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Senior Member
1,332 posts Joined: Oct 2005
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Anyone knows if i can tap the water pump power to either the water heater/ aircond / lights outlet? Its because my water pump wiring nearest exit is near one of the bedroom.
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Jan 6 2021, 01:36 PM
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#5
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Senior Member
1,332 posts Joined: Oct 2005
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QUOTE(sepulse @ Jan 6 2021, 10:39 AM) hi anyone using Grundfos CM3-4PM1 or any CM series? hows the noise? I'm using CM3-5PM1 and installed it at the roof area which is just above my master room. for me the noise is quite ok. it sounded like someone started their car engine when i'm in the room. u can hear it but its not that distracting. |
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Jan 9 2021, 01:50 PM
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#6
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Senior Member
1,332 posts Joined: Oct 2005
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QUOTE(investor @ Jan 8 2021, 10:03 PM) Hi..i think i need to get a new pump already. My grundfos pump gave me a lot of problem oredi (maybe it ageing oredi cos previous bought second hand from my uncle). It need to off and on the switch only the pump run..after a while the pump go into idle and i need to off and on again the pump only run. Troublesome. Can get CM3-5PM1 cheapest i saw is Rm1300Previously oredi change the controller to third party brand kawa (thought thats the problem)..initial ok after few month used but the problem back again..need to off and on arrghhh. Any recommendation grundfos model? House 5 bathroom but normally only two bath room used together. Others bathroom seldom use. Budget less than RM 1.5 to 1.8k. any promotion now? |
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Mar 22 2021, 09:09 PM
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#7
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Senior Member
1,332 posts Joined: Oct 2005
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Hi guys, any idea how do i release air from the water pump? Currently my pump keep turning on even only low amount of water is used. My model is grundfos CM3-5PM1
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Mar 23 2021, 09:28 AM
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#8
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Senior Member
1,332 posts Joined: Oct 2005
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QUOTE(slimey @ Mar 23 2021, 12:15 AM) there's no air to release. it doesnt use a pressure tank Forgot to mention i did add on a pressure tank from another grundfos model. |
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