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.




6 posts

Wannabe Geek


# 258556 9-Oct-2019 16:19
Send private message quote this post

Hi All,

 

I am in need to of some help with regards to identifying what is causing water dripping (not the little water in the pic) from the water heater external drain pipe (which has caused high water bills in the past few months)

 

I have attached a pic, with some additional pics for different angles to show you my water heater setup

 

Based on the numbers marked in the image, I have noted below the respective valves and pipes to the best of my knowledge but I am new to this, so please do correct me if I am wrong:

 

1. Cold Water Inlet (rising from below the floor)

 

2. Power Supply

 

3. Filter/Non-Return Valve

 

4. Limiting Stop Valve

 

5. Cold Water Expansion Valve EVT

 

6. Is this blue tap a gate valve?

 

7. What is the purpose of this pipe (its cold)

 

8. Cold Pipe, coming out of the top of the cylinder and draining down to outside

 

9. Hot pipe, coming out of the top of the cylinder and supplying hot water to the house.

 

 

 

So the when the mains are open at the water meter, the meter is ticking slowly but continuously. I noticed that the near the waste water outlet (outside the house) there is a small pipe dripping water continuously.

 

I narrowed it down to the water heater area and this external drain pipe connects to the pipe 8. (in the pic) and the EVT (5.)

 

When I close the filter (3.) then the supply to the water heater stops, i.e. the hot water in the taps also stop and the dripping out of the drain pipe stops too.

 

 

 

Is it the cold water expansion valve (5.) which is faulty or is the heater overfilling internally to cause it to drain excess cold water?

 

 

 

NOTE: There is no visible leakage anywhere around or above or below the water heater.

 

Any help would be super great as I would like to DIY this if its possibly a minor issue.

 

 

 

Thanks,

 

Sheldon

 

 

 

 

 

 

 

 

 

 

 


Create new topic
2997 posts

Uber Geek


  # 2333456 9-Oct-2019 17:16
Send private message quote this post

Regardless of brand the trouble shooting should be similar. https://apexvalves.co.nz/fault-finding-guides/

5574 posts

Uber Geek


  # 2333459 9-Oct-2019 17:20
One person supports this post
Send private message quote this post

No pics, but the most common reasons would be a leaking expansion/pressure release valve causing water to keep slowly leaking, or a failed thermostat causing it to overheat and release pressure through the expansion valve.

 

If it stops leaking after a while if you turn off the power, it's probably the thermostat causing it to over heat. If it keeps leaking when powered off, then a leaky valve.

 

@aredwood knows a thing or 2 about these.


 
 
 
 




6 posts

Wannabe Geek


  # 2333511 9-Oct-2019 18:07
Send private message quote this post




6 posts

Wannabe Geek


  # 2333512 9-Oct-2019 18:09
Send private message quote this post

thank you for you quick responses. I will test and proceed accordingly




6 posts

Wannabe Geek


  # 2333521 9-Oct-2019 18:28
Send private message quote this post

Hi,

 

Tested and even when (2.) power is switched off, as soon as the Filter Stop (3.) is opened, the water is dripping at the outside drain exit.

 

 

 

 


63 posts

Master Geek


  # 2333646 10-Oct-2019 08:23
Send private message quote this post

If it is your thermal relief valve (TRV) passing then the pipe from it to the drain will feel warm




6 posts

Wannabe Geek


  # 2333845 10-Oct-2019 10:48
Send private message quote this post

Pipe (8.) from top of cylinder, connected to the TRV, is room temperature. Water at the drain outside is cool, not cold though.

 

So does that narrow down to the cold water expansion valve, being the possible fault, causing the cool water to drip continuously through the drain pipe outside?


 
 
 
 


63 posts

Master Geek


  # 2334903 10-Oct-2019 11:58
Send private message quote this post

Yes that points to either your CWE valve or manual drain valve passing.

 

You could temporarily remove the drain piping (7) to see which is passing.

 

Have you lifted the lever on the CWE valve to flush it?

 

 




6 posts

Wannabe Geek


  # 2335179 10-Oct-2019 18:30
Send private message quote this post

I have lifted the lever on the CWE, and water does gush out of the same outlet outside, and then reduces to dripping once I release the lever.

 

I cant remove pipe 7., welded on one side and I am afraid I might break it.

 

What is the purposed of the blue tap (6.)? is that a gate valve? and does it have to be completely clockwise or anti-clockwise or in between? Tried all combinations with this one and the dripping doesnt seem to stop

 

 


2997 posts

Uber Geek


  # 2335212 10-Oct-2019 19:48
Send private message quote this post

Opening the blue tap with the cylinder stop valve closed would drain the tank. If you didn't notice any change at the drain outlet maybe the gate valve is stuck shut. The valve wheel should turn quite a few turns winding up and down.

Create new topic



Twitter and LinkedIn »



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 »

Microsoft New Zealand Partner Awards results
Posted 18-Oct-2019 10:18


Logitech introduces new Made for Google keyboard and mouse devices
Posted 16-Oct-2019 13:36


MATTR launches to accelerate decentralised identity
Posted 16-Oct-2019 10:28


Vodafone X-Squad powers up for customers
Posted 16-Oct-2019 08:15


D Link ANZ launches EXO Smart Mesh Wi Fi Routers with McAfee protection
Posted 15-Oct-2019 11:31


Major Japanese retailer partners with smart New Zealand technology IMAGR
Posted 14-Oct-2019 10:29


Ola pioneers one-time passcode feature to fight rideshare fraud
Posted 14-Oct-2019 10:24


Spark Sport new home of NZC matches from 2020
Posted 10-Oct-2019 09:59


Meet Nola, Noel Leeming's new digital employee
Posted 4-Oct-2019 08:07


Registrations for Sprout Accelerator open for 2020 season
Posted 4-Oct-2019 08:02


Teletrac Navman welcomes AI tech leader Jens Meggers as new President
Posted 4-Oct-2019 07:41


Vodafone makes voice of 4G (VoLTE) official
Posted 4-Oct-2019 07:36


2degrees Reaches Milestone of 100,000 Broadband Customers
Posted 1-Oct-2019 09:17


Nokia 1 Plus available in New Zealand from 2nd October
Posted 30-Sep-2019 17:46


Ola integrates Apple Pay as payment method in New Zealand
Posted 25-Sep-2019 09:51



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.