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.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
2141 posts

Uber Geek
+1 received by user: 720

Subscriber

  Reply # 1092516 20-Jul-2014 15:25
Send private message

You need to measure the height difference between the cylinder and the point you will be installing the relief valve. This height + 3.7m (relief valve rating) can't exceed 7.6m

[edited to add]

Don't install a relief valve if there is a wetback fire connected to your cylinder. The cylinder may explode.

351 posts

Ultimate Geek
+1 received by user: 159


  Reply # 1093927 22-Jul-2014 20:57
One person supports this post
Send private message

Hey OP, I had the same problem when moving into my new (rented) house.
As the owner wasn't keen on installing anything I had to make do with the existing parameters and troubleshoot the thing myself. I know a few of these are mentioned in the thread, I don't know why you want good hot water pressure, but 99% of the time it's for a shower?
But here's simply my process I followed, and how I got a satisfactory shower.
  Step 1. Check if the shower 'rose' has a pressure restrict valve at either end of the flexible pipe. If so remove it.

Step 2. Check if your shower mixer has a pressure H / C relief valve next to the mixer unit. (you'll need to remove your hot water "handle" base plate, usually performed with a 4-6mm allen key poked into the hole at the bottom.) Hopefully the hole in your wall is large enough to see, let along distinguish how to identify which is increasing and decreasing.. (For me I was unable to see these at all.)

Step 3. Check whether my hot water cylinder has a variable pressure relief valve. See: http://www.youtube.com/watch?v=eDxx_od_LL0] Youtube link to identify and change your pressure relief valve.

Step 4. If in step 2 you have a pressure relief valve, take a photo to represent current state, and make gentle rotations only a 1/4 at a time. If possible have a friend monitor the overflow valve.
Basically I turned mine until only cold water sometimes comes out. (Some tanks are smart enough that if you overpressure them they release cold water over hot to relieve pressure)

Step 5. investigate turning up your hot water cylinder temperature. The default for many is 60degC (as is required to kill legionaires or something..) I increased mine substantially.. (word from the wise, if you have kids skip this option.)

Step 6. Buy a new specifically "low hot water pressure shower rose" they can be costly, around $100.

Step 7. Hopefully you have awesome hot showers by now, if you don't (like me) the last step is understanding why you have crappy mixed pressure at a desirable temperature, which is your cold water is literally overwhelming your hot water and restricting it's flow. So in turn you need to restrict your cold water flow. So yes, I went to the road and severely restricted my cold water pressure.

Only then was my hot water pressure at my rose acceptable (I'm not talking the best of the best, but enough to rinse suds from your hair without the need to take 10 minutes and vigorous hand movements!

Hope this helps OP and anyone else interested. It took me a few weeks to get all this information together, so hopefully it works for someone else!

 
 
 
 


477 posts

Ultimate Geek
+1 received by user: 67


  Reply # 1096036 26-Jul-2014 11:27
Send private message

kiwitrc: You can get a shower boost pump if its just the shower you want to sort out. This wont affect any of your other plumbing.

+1
They are cheap, they work well, it's not just the shower you can hook it to.


1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

New Zealand's IT industry in 2018 and beyond
Posted 22-Jan-2018 12:50


Introducing your new workplace headache: Gen Z
Posted 22-Jan-2018 12:45


Jucy set to introduce electric campervan fleet
Posted 22-Jan-2018 12:41


Hawaiki cable system will be ready for service in June 2018
Posted 22-Jan-2018 12:32


New Zealand hits peak broadband data
Posted 18-Jan-2018 12:21


Amazon Echo devices coming to New Zealand early February 2018
Posted 18-Jan-2018 10:53


$3.74 million for new electric vehicles in New Zealand
Posted 17-Jan-2018 11:27


Nova 2i: Value, not excitement from Huawei
Posted 17-Jan-2018 09:02


Less news in Facebook News Feed revamp
Posted 15-Jan-2018 13:15


Australian Government contract awarded to Datacom Connect
Posted 11-Jan-2018 08:37


Why New Zealand needs a chief technology officer
Posted 6-Jan-2018 13:59


Amazon release Silk Browser and Firefox for Fire TV
Posted 21-Dec-2017 13:42


New Chief Technology Officer role created
Posted 19-Dec-2017 22:18


All I want for Christmas is a new EV
Posted 19-Dec-2017 19:54


How clever is this: AI will create 2.3 million jobs by 2020
Posted 19-Dec-2017 19:52



Geekzone Live »

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



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.