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Main
Date: 16 Jun 2006 02:18:59
From: Mark Cooper
Subject: RO membrane question
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Our house has an odd plumbing issue. Someone in years past set it up so
that a certain amount of hot water is fed through the cold water pipes,
apparently thinking this would keep the pipes from freezing in cold
weather.
Often when you first turn on the cold tap you get some pretty warm water,
verging on hot. When my RO unit first kicks on and some of this very warm
water goes through, will this hurt the membrane in any way?
Thanks,
k
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Date: 16 Jun 2006 17:44:55
From: Steve
Subject: Re: RO membrane question
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On 16 Jun 2006 02:18:59 GMT, k Cooper <vikubz@cfu.NOnet > wrote:
>Often when you first turn on the cold tap you get some pretty warm water,
>verging on hot. When my RO unit first kicks on and some of this very warm
>water goes through, will this hurt the membrane in any way?
>
This usually happens when a cold water pipe is routed very close to a
hot pipe, particularly if that is part of the heating circuit that is
always on. The cold water standing in the pipe has time to warm up if
it's not been run for a while.
Steve
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Date: 18 Jun 2006 01:46:07
From: George Patterson
Subject: Re: RO membrane question
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Steve wrote:
> This usually happens when a cold water pipe is routed very close to a
> hot pipe, particularly if that is part of the heating circuit that is
> always on. The cold water standing in the pipe has time to warm up if
> it's not been run for a while.
In a normal plumbing situation, the only pipes that will be hot will be those
fairly close to the water heater. I would insulate both hot and cold water pipes
in this area with some of the foam tubes sold at stores like Home Depot. Even
hot water pipes will be cold to the touch several feet away from the heater if
the hot water is not flowing through the pipes.
George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.
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Date: 18 Jun 2006 14:13:26
From: Mark Cooper
Subject: Re: RO membrane question
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George Patterson <grpphoto@verizon.net > wrote in
news:zf2lg.8899$YI2.4656@trnddc01:
> Steve wrote:
>
>> This usually happens when a cold water pipe is routed very close to a
>> hot pipe, particularly if that is part of the heating circuit that is
>> always on. The cold water standing in the pipe has time to warm up
>> if it's not been run for a while.
>
> In a normal plumbing situation, the only pipes that will be hot will
> be those fairly close to the water heater. I would insulate both hot
> and cold water pipes in this area with some of the foam tubes sold at
> stores like Home Depot. Even hot water pipes will be cold to the touch
> several feet away from the heater if the hot water is not flowing
> through the pipes.
>
> George Patterson
> Coffee is only a way of stealing time that should by rights
> belong to your slightly older self.
>
I think the times the water has been warm is after we've been doing
laundry or using the dishwasher. I think if I just run the cold tap for
awhile before the RO unit kicks in I'll be fine.
Thanks,
k
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Date: 16 Jun 2006 21:57:03
From: Mark Cooper
Subject: Re: RO membrane question
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Steve <steve@deletethissjwilliams.com > wrote in
news:rqq5929lt2p5arh926ge4nhsajr50ngmth@4ax.com:
> On 16 Jun 2006 02:18:59 GMT, k Cooper <vikubz@cfu.NOnet> wrote:
>
>>Often when you first turn on the cold tap you get some pretty warm
>>water, verging on hot. When my RO unit first kicks on and some of this
>>very warm water goes through, will this hurt the membrane in any way?
>>
>
> This usually happens when a cold water pipe is routed very close to a
> hot pipe, particularly if that is part of the heating circuit that is
> always on. The cold water standing in the pipe has time to warm up if
> it's not been run for a while.
>
> Steve
>
Thanks all!
k
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Date: 16 Jun 2006 14:10:20
From: Wayne Sallee
Subject: Re: RO membrane question
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I would definately be doing some replumbing on that house.
Wayne Sallee
Wayne's Pets
Wayne@WaynesPets.com
k Cooper wrote on 6/15/2006 10:18 PM:
> Our house has an odd plumbing issue. Someone in years past set it up so
> that a certain amount of hot water is fed through the cold water pipes,
> apparently thinking this would keep the pipes from freezing in cold
> weather.
>
> Often when you first turn on the cold tap you get some pretty warm water,
> verging on hot. When my RO unit first kicks on and some of this very warm
> water goes through, will this hurt the membrane in any way?
>
>
> Thanks,
> k
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Date: 16 Jun 2006 15:55:27
From: Susan
Subject: Re: RO membrane question
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I agree hot/warm water through an R/O unit is not good. Also, like Wayne
said you may want to get some re-plumbing done.
Susan :)
"Wayne Sallee" <Wayne@WayneSallee.com > wrote in message
news:4492BBC7.1010109@WayneSallee.com...
>I would definately be doing some replumbing on that house.
>
> Wayne Sallee
> Wayne's Pets
> Wayne@WaynesPets.com
>
>
> k Cooper wrote on 6/15/2006 10:18 PM:
>> Our house has an odd plumbing issue. Someone in years past set it up so
>> that a certain amount of hot water is fed through the cold water pipes,
>> apparently thinking this would keep the pipes from freezing in cold
>> weather. Often when you first turn on the cold tap you get some pretty
>> warm water, verging on hot. When my RO unit first kicks on and some of
>> this very warm water goes through, will this hurt the membrane in any
>> way?
>>
>>
>> Thanks,
>> k
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Date: 15 Jun 2006 21:54:26
From: Pszemol
Subject: Re: RO membrane question
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"k Cooper" <vikubz@cfu.NOnet > wrote in message news:Xns97E3D8DC4B947vikubzcfunet@129.250.170.81...
> When my RO unit first kicks on and some of this very warm
> water goes through, will this hurt the membrane in any way?
Yes. Maximum water temperature for membranes is pretty low.
http://www.google.com/search?q=%22reverse+osmosis%22+maximum+water+temperature
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