Jan 10 2012, 03:40 PM
Looking at the piping plan below, I think my plumber had made the same mistake. My rain shower when using cold water is stronger, but when I use warm water drawn from a water heater tank, the pressure drops.
My 1-year old pump just spoilt, and all the taps in the First Floor baths are down to a trickle (not so trickle, but water is super super slow).
My pump is set up outside my house, I was told this is better because of easier access for repair or maintenance. I have a switch next to the pump, I supposed when it is time to change the pump or to repair, etc, one just need to switch off. I dont have any shelter, other than for the eaves of the roof.
I was advise that I shld have a switch inside the house, so I could just switch on the pump for bathing purposes.
Currently, my pump 'wails' every now and then, as it powers the 2 bathrooms and every time I turn on a tap or flush the toilets, the noise goes..
Any advise?
QUOTE(zheilwane @ Oct 2 2011, 12:25 AM)
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
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
Quote
. I was also under the impression that if the pump is not on, there will be no water flowing into the bath taps, etc.
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