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3221 posts

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#270064 21-Apr-2020 18:15
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We are having a whole house water filter system installed in our new house build.

 

Unfortunately because of the Level 3 lockdown it's problematic to meet them onsite before they start the pre-pipe so have to sort it all by email and phone.

 

We're wanting to have the outdoor taps and toilets unfiltered, and everything else filtered. Is the below diagram the best way to configure this? I just wanted to get some feedback that it looks correct and self explanatory before I said it to the plumber.

 

It's one of those this that is easy face to face, but hard to describe over the phone or in writing.

 

Click to enlarge:

 

Click to see full size

 

Thanks





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  #2467287 21-Apr-2020 18:58
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Looks fine to me

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  #2467316 21-Apr-2020 19:41
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What is the water pressure on the filtered side? could be some very poor shower's looking at the pressure reducing valve...




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  #2467376 21-Apr-2020 20:02
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mentalinc: What is the water pressure on the filtered side? could be some very poor shower's looking at the pressure reducing valve...

 

Pressure limiting valve reduces pressure going into the filter to 500 kPa I believe.

 

Pressure and flow rate after the filter will be dependent on what filter cartridges I use.

 

I think having one of these before the filter is pretty standard.


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  #2467505 22-Apr-2020 00:12
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We have a filter on the kitchen sink only dating back to previous owner and chlorine use by council. Water supply has improved so I am now considering leaving cartridge out on basis of water seems ok and filter should be regularly replaced. What I do notice more is lime scale ring in toilet just above the waterline. So far that is resisting CLR and white vinegar.

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  #2467509 22-Apr-2020 00:44
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Should be fine but be aware you now need 2 water feeds to every bathroom which will cost more.


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  #2467521 22-Apr-2020 01:37
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Depending on how the plumbing is being arranged, you might need an isolation valve coming up from the ground before the tee. I've usually seen these mounted around 1200 in new builds. If you have an exterior toby this might be different, and it might depend on your council's requirements. I'm not a plumber.

 

 

 

Changing filters is a moderately messy and wet process, and if you have a sealing issue you don't really want a leak inside. I'd put them outside or at least somewhere very resistant to water damage.


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