Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


rendezvous

165 posts

Master Geek

Subscriber

#197909 17-Jun-2016 12:24
Send private message

Hello,

 

Our hot water cylinder makes occasional dripping sounds, like a little is going down the overflow pipe. Now I think I can hear dripping on the roof, I guess someone will have to come and look at it. While investigating what was going on (I didn't work it out), I wondered what this tap thing does? Also, what setting should it be on?

 

Click to see full size

 

Click to see full size

 

 


Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
timmmay
16536 posts

Uber Geek

Trusted
Subscriber

  #1575696 17-Jun-2016 12:32
Send private message

It might be the mixing thingy (I just made that name up). Modern hot water cylinder temperatures are constant, with no controls. To control the temperature at the tap the hot water at 65c or higher is mixed with cold to prevent burns.


SaltyNZ
5481 posts

Uber Geek

Trusted
Lifetime subscriber

  #1575698 17-Jun-2016 12:33
Send private message

That premixes cold water with hot on its way out to the hot water pipes. The hot water in the tank needs to be very hot - 70 deg+ - to prevent Legionella bacteria. But the water coming out of the hot tap needs to be much colder - usually around 50 deg - to prevent instant scalding.





iPad Pro 11" + iPhone XS + 2degrees 4tw!

 

These comments are my own and do not represent the opinions of 2degrees.


 
 
 
 


Stu

Stu
Hammered
5518 posts

Uber Geek

Moderator
Trusted
Lifetime subscriber

  #1575699 17-Jun-2016 12:36
Send private message

Tempering Valve, I think they're called.





Keep calm, and carry on posting.


nickb800
2476 posts

Uber Geek

Trusted

  #1575701 17-Jun-2016 12:37
Send private message

It's called a tempering valve, as described by the comments above


elpenguino
1484 posts

Uber Geek

Subscriber

  #1575702 17-Jun-2016 12:39
Send private message

Try follow the pipes. Could be tempering valve as shown but for mains pressure cylinder there is also a pressure relief, as far as I know anyway

rendezvous

165 posts

Master Geek

Subscriber

  #1575706 17-Jun-2016 12:44
Send private message

Ok thanks SaltyNZ and timmmay


timmmay
16536 posts

Uber Geek

Trusted
Subscriber

  #1575709 17-Jun-2016 12:47
Send private message

Mixing thingy, tempering valve, I was pretty close!

 

In winter we have to have the dial in the shower a lot further around, because the cold water temperature goes down so much in winter. Even to brush my teeth I need a fair amount of warm water otherwise the cold is too much.


 
 
 
 


lxsw20
2490 posts

Uber Geek


  #1575711 17-Jun-2016 12:51
Send private message

timmmay:

 

It might be the mixing thingy (I just made that name up). Modern hot water cylinder temperatures are constant, with no controls. To control the temperature at the tap the hot water at 65c or higher is mixed with cold to prevent burns.

 

 

 

 

Hot water cylinders still have a thermostat to control the temperature of the water in the tank. It's just you need to cool it down once it leaves the tank, as mentioned above it needs to be 65+ to kill legionnaires, but that is far too hot at the tap, hence the tempering valve. 


timmmay
16536 posts

Uber Geek

Trusted
Subscriber

  #1575715 17-Jun-2016 12:56
Send private message

Mine didn't have any controls I could find, not that you should need to anyway. Yep I know what the valve is for.


richms
23683 posts

Uber Geek

Trusted
Subscriber

  #1575726 17-Jun-2016 13:20
Send private message

Sometimes they stuff up and only give you tepid hot water and need a whack from a nearby book or something else soft to get the water back being hot again too.





Richard rich.ms

rendezvous

165 posts

Master Geek

Subscriber

  #1575727 17-Jun-2016 13:21
Send private message

Cool

 

I've adjusted it to 4.5/8, that seems to give me fairly hot water at the tap, but doesn't burn unless I leave my hand there for a while.


cisconz
cisconz
1258 posts

Uber Geek

Trusted
Lifetime subscriber

  #1575728 17-Jun-2016 13:23
Send private message

The Pressure release valve looks like this

 

Pressure Release

 

 

 

Also the tempering valve is set to fail cold - so if you only get cold water and your HW Cylinder is hot - that is your issue.





Hmmmm


Shoes2468
720 posts

Ultimate Geek


  #1575764 17-Jun-2016 14:22
Send private message

SaltyNZ:

 

That premixes cold water with hot on its way out to the hot water pipes. The hot water in the tank needs to be very hot - 70 deg+ - to prevent Legionella bacteria. But the water coming out of the hot tap needs to be much colder - usually around 50 deg - to prevent instant scalding.

 

 

 

 

70 degrees + I dont think so, more like 65 much higher is just wasteful unless your trying to extend  the amount of hotwater required


Spyware
2598 posts

Uber Geek

Lifetime subscriber

  #1575812 17-Jun-2016 15:16
Send private message

Shoes2468:

 

SaltyNZ:

 

That premixes cold water with hot on its way out to the hot water pipes. The hot water in the tank needs to be very hot - 70 deg+ - to prevent Legionella bacteria. But the water coming out of the hot tap needs to be much colder - usually around 50 deg - to prevent instant scalding.

 

 

 

 

70 degrees + I dont think so, more like 65 much higher is just wasteful unless your trying to extend  the amount of hotwater required

 

 

Guideline is to have hot water temp 15 degrees higher than temp valve (55).





Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+. UAP, UAP AC Pro, UAP AC Pro Mesh, Apple TV 4, Apple TV 4K, iPad Air 1, iPhone XR, VodaTV Gen 2. If it doesn't move then it's data cabled.


JonnyCam
585 posts

Ultimate Geek


  #1575939 17-Jun-2016 17:39
Send private message

Spyware:

 

 

 

 

 

Guideline is to have hot water temp 15 degrees higher than temp valve (55).

 

 

EECA says 60 degrees at the cylinder.


 1 | 2
Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic





News »

Huawei launches IdeaHub Pro in New Zealand
Posted 27-Oct-2020 16:41


Southland-based IT specialist providing virtual services worldwide
Posted 27-Oct-2020 15:55


NASA discovers water on sunlit surface of Moon
Posted 27-Oct-2020 08:30


Huawei introduces new features to Petal Search, Maps and Docs
Posted 26-Oct-2020 18:05


Nokia selected by NASA to build first ever cellular network on the Moon
Posted 21-Oct-2020 08:34


Nanoleaf enhances lighting line with launch of Triangles and Mini Triangles
Posted 17-Oct-2020 20:18


Synology unveils DS16211+
Posted 17-Oct-2020 20:12


Ingram Micro introduces FootfallCam to New Zealand channel
Posted 17-Oct-2020 20:06


Dropbox adopts Virtual First working policy
Posted 17-Oct-2020 19:47


OPPO announces Reno4 Series 5G line-up in NZ
Posted 16-Oct-2020 08:52


Microsoft Highway to a Hundred expands to Asia Pacific
Posted 14-Oct-2020 09:34


Spark turns on 5G in Auckland
Posted 14-Oct-2020 09:29


AMD Launches AMD Ryzen 5000 Series Desktop Processors
Posted 9-Oct-2020 10:13


Teletrac Navman launches integrated multi-camera solution for transport and logistics industry
Posted 8-Oct-2020 10:57


Farmside hits 10,000 RBI customers
Posted 7-Oct-2020 15:32









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.