#1 12-10-2016 22:29:15

baxterlow
Owner
Registered: 26-09-2016
Posts: 25

hot water

Hi,

I've noticed when our hot water system (truma) is on, that we get a little blast of hot water coming out of the cold tap when you initially turn the tap on (cold).  The tap will run cold for a couple of seconds and then about three or four seconds of "full temp" hot water will come through before it returns to cold.  Dunno if it's something they all do or we've just got a connection crossed somewhere.  I've found that we're wasting a fair bit of water waiting for it to return to cold each time we use the tap.  Too dangerous, particularly for kids, to wash hands under etc. Thanks. 

We've got an Onyx.

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#2 13-10-2016 22:16:20

fringe dweller
Owner
From: Berwick Victoria
Registered: 29-04-2016
Posts: 12

Re: hot water

Hi, we have a Gascoyne and haven't noticed ours doing that.


Cheers Kevin & Vicki

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#3 14-10-2016 20:07:11

RobynJohnson
Owner
Registered: 15-06-2016
Posts: 5

Re: hot water

we have an Onyx and it doesn't do that


Happy Travels!
Mark & Robyn Johnson

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#4 15-10-2016 20:14:51

baxterlow
Owner
Registered: 26-09-2016
Posts: 25

Re: hot water

Thanks for the replies.

Wanted to see if it was just my unit doing it.  Looks like it at this stage and will have to investigate further.

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#5 20-10-2016 18:20:57

Sdoxey
Owner
From: Adelaide
Registered: 12-09-2016
Posts: 3

Re: hot water

Our Mitchell does that also but not for as long as you indicate. Maybe only a couple of seconds and warm rather than hot.

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#6 21-10-2016 16:06:29

baxterlow
Owner
Registered: 26-09-2016
Posts: 25

Re: hot water

Sdoxey wrote:

Our Mitchell does that also but not for as long as you indicate. Maybe only a couple of seconds and warm rather than hot.

Thanks Sdoxey.  Ours is FULL temp hot water when it changes over.  I'll keep investigating and see what I can come up with.  Possibly a dodgy mixer tap.

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#7 03-01-2017 11:37:36

KandA
Owner
Registered: 07-12-2016
Posts: 3

Re: hot water

Hi we also have a Mitchell that does this water temp will vary with the amount of time cold is used after the hot water can still be warm up to a half hr later. Have u spoken to pioneer if so what was the reply

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#8 03-01-2017 11:58:27

KandA
Owner
Registered: 07-12-2016
Posts: 3

Re: hot water

Hi we also have a Mitchell that does this water temp will vary with the amount of time cold is used after the hot water can still be warm up to a half hr later. Have u spoken to pioneer if so what was the reply

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#9 18-01-2017 22:29:40

baxterlow
Owner
Registered: 26-09-2016
Posts: 25

Re: hot water

KandA wrote:

Hi we also have a Mitchell that does this water temp will vary with the amount of time cold is used after the hot water can still be warm up to a half hr later. Have u spoken to pioneer if so what was the reply



Hi KandA,  yes the temp does change after running cold water for a bit.  Same as mine.  Our Pioneer rep in Brisbane has sourced a replacement mixer tap for us and we're going to give that a go.  Cant see how it could be anything else because the mixing happens right at the tap.  I'll keep you posted.  BAXTERLOW

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#10 10-09-2017 13:45:09

baxterlow
Owner
Registered: 26-09-2016
Posts: 25

Re: hot water

Howdy all.

I've solved the issue of the hot water blowing back up through the cold tap and it's as simple as adding a non-return valve to the cold water line after the pressure regulator but before the input to the Truma system.  Someone on this forum had mentioned about it but for some reason the post has been removed.  The job is really easy to do and fixed the issue straight away.  The Truma manual shows the non-return valve location (nrv) but after speaking to Dometic they said that it's not included when they supply a unit but every installer should do it..(?)  Dunno why it's not included...but whatever.  It's easy to do.  I've attached a couple of pics.
after.jpg

before.jpg

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