Geekzone: technology news, blogs, forums
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 
2308 posts

Uber Geek
+1 received by user: 823


  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.

368 posts

Ultimate Geek
+1 received by user: 163

  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:] 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!


486 posts

Ultimate Geek
+1 received by user: 70

  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.

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 »

Fujifilm X beats its best with new top of the range, high-performance camera
Posted 24-Feb-2018 14:05

One million kiwis affected by cybercrime
Posted 24-Feb-2018 13:58

New Zealanders want to engage with government online and via mobile apps
Posted 24-Feb-2018 13:56

Samsung launches Samsung Max
Posted 24-Feb-2018 13:52

CPTPP text and National Interest Analysis released for public scrutiny
Posted 21-Feb-2018 19:43

Foodstuffs to trial digitised shopping trolleys
Posted 21-Feb-2018 18:27

2018: The year of zero-login, smart cars & the biometrics of things
Posted 21-Feb-2018 18:25

Intel reimagines data centre storage with new 3D NAND SSDs
Posted 16-Feb-2018 15:21

Ground-breaking business programme begins in Hamilton
Posted 16-Feb-2018 10:18

Government to continue search for first Chief Technology Officer
Posted 12-Feb-2018 20:30

Time to take Appleā€™s iPad Pro seriously
Posted 12-Feb-2018 16:54

New Fujifilm X-A5 brings selfie features to mirrorless camera
Posted 9-Feb-2018 09:12

D-Link ANZ expands connected smart home with new HD Wi-Fi cameras
Posted 9-Feb-2018 09:01

Dragon Professional for Mac V6: Near perfect dictation
Posted 9-Feb-2018 08:26

OPPO announces R11s with claims to be the picture perfect smartphone
Posted 2-Feb-2018 13:28

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.