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.

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 | 3 | 4 | 5 | 6 | 7
Infrastructure Geek
3708 posts

Uber Geek
+1 received by user: 88

Trusted
Microsoft NZ
Subscriber

  Reply # 750424 24-Jan-2013 21:35 Send private message

Have you called metrowater (or whatever they are called under the supercity) and asked them to check? They took a look at mine, replaced the meter (with a 25mm one) and improved things initially - cost me nothing.




Technical Evangelist
Microsoft NZ
about.me/nzregs
Twitter: @nzregs


176 posts

Master Geek


  Reply # 750437 24-Jan-2013 21:51 Send private message

networkn: Can you use a water pressure pump if you have an infinity gas water heater thing?

Seems like the most definiate way of fixing the problems.

I don't want to reduce the flow to increase pressure. We have tried a couple of heads, didn't seem to help, but when they renovated our ensuite, and removed the water to that area, the water pressure in the other bathroom was better if that helps?


Have you seen these?

http://www.trademe.co.nz/home-living/bathroom/other/auction-555334213.htm



7287 posts

Uber Geek
+1 received by user: 907

Trusted
Subscriber

  Reply # 750447 24-Jan-2013 22:00 Send private message

quandum:
networkn: Can you use a water pressure pump if you have an infinity gas water heater thing?

Seems like the most definiate way of fixing the problems.

I don't want to reduce the flow to increase pressure. We have tried a couple of heads, didn't seem to help, but when they renovated our ensuite, and removed the water to that area, the water pressure in the other bathroom was better if that helps?


Have you seen these?

http://www.trademe.co.nz/home-living/bathroom/other/auction-555334213.htm


Looks like it requires a cylinder which we don't have.



7287 posts

Uber Geek
+1 received by user: 907

Trusted
Subscriber

  Reply # 754086 31-Jan-2013 20:50 Send private message

Well I called Metrowater and they sent someone out. They measured water at the street at 450, at the entry to the house at 400 and said that it was above what they considered acceptable (350) and left. They said the loss of 50 pressure was due to the long driveway, but we had 20mm pipes which were good.

Not sure what to do now.

7071 posts

Uber Geek
+1 received by user: 504

Trusted
Subscriber

  Reply # 754090 31-Jan-2013 21:00 Send private message

I guess you'll need to install a pump to increase the pressure. I guess it sucks the water in from the mains faster and pushes it out the taps faster too. I think you can do one tap or all of them. Best ask a plumber.




Asus eee pad transformer
iPod 2G
Windows 7 PC
Lots and lots of Nikon camera gear

406 posts

Ultimate Geek
+1 received by user: 79


  Reply # 754125 31-Jan-2013 22:24 Send private message

Sounds like a pump might be the way to go.

A plumber would know to look at any meter, regulator and/or check valves, and would consider the age of the house vs the pipe up the driveway. Older homes have old cast iron pipes (edit: to the house,  even when copper etc... is used inside) that after decades of rusting on the inside really restrict flow from the toby, but it sounds like yours is relatively new.

Was the pressure reading 400KPA? If so 58 PSI is not that bad.



7287 posts

Uber Geek
+1 received by user: 907

Trusted
Subscriber

  Reply # 754394 1-Feb-2013 13:30 Send private message

kiwirock: Sounds like a pump might be the way to go.

A plumber would know to look at any meter, regulator and/or check valves, and would consider the age of the house vs the pipe up the driveway. Older homes have old cast iron pipes (edit: to the house,  even when copper etc... is used inside) that after decades of rusting on the inside really restrict flow from the toby, but it sounds like yours is relatively new.

Was the pressure reading 400KPA? If so 58 PSI is not that bad.


Not sure what the pressure measurements were in. I think he was saying between the 450 (Street) and 400 (House) we were losing 50 whatevers, because of the long drive, but that doesn't really make sense to me, as once the pipe is full, pressure should be driven by the source. 

He said the taps outside will be supplied by the inside water supply which also sounded weird. Where would I install the pump? At the entry to the house, or just in the shower? We have a continuous gas heating system, will that interfere or cause issues?


7071 posts

Uber Geek
+1 received by user: 504

Trusted
Subscriber

  Reply # 754397 1-Feb-2013 13:36 Send private message

With respect, ask a professional who can look at your situation.




Asus eee pad transformer
iPod 2G
Windows 7 PC
Lots and lots of Nikon camera gear



7287 posts

Uber Geek
+1 received by user: 907

Trusted
Subscriber

  Reply # 754398 1-Feb-2013 13:38 Send private message

timmmay: With respect, ask a professional who can look at your situation.


Ok thanks. 

406 posts

Ultimate Geek
+1 received by user: 79


  Reply # 754486 1-Feb-2013 16:57 Send private message



Not sure what the pressure measurements were in. I think he was saying between the 450 (Street) and 400 (House) we were losing 50 whatevers, because of the long drive, but that doesn't really make sense to me, as once the pipe is full, pressure should be driven by the source.



True, but if the pipe goes up an incline on the way to the house, pressure will reduce at the top regardless if it's full or not (gravity).




He said the taps outside will be supplied by the inside water supply which also sounded weird. Where would I install the pump? At the entry to the house, or just in the shower? We have a continuous gas heating system, will that interfere or cause issues?



To hazard a guess, in the USA taps outside are feed from whatever pressure is coming from the street to the house. Then the inside system is fed from a pressure reducing valve further downstream. This gives you full pressure outside for washing driveways or running a water blaster better etc... but kinder pressure on the inside plumbing.. If there is a pressure reducing valve, the reading may have been taken after it rather than before it - if the outside tap is run from the inside system.

I live in Invercargill, we're too hillbilly to come across whole house regulators in the average home yet, little own meters.

But as for a pump, best option is to talk to a pro, then they can calculate what size needed for how many taps and/or how much improvement could be made to the pressure with a pump in the first place. As mentioned by someone else earlier, gas instant hot water is mains pressure so that doesn't really matter. It's pump size vs how many outlets you want boosted and how long the pump is rated for continuous use for etc... & of course the $$$.


Infrastructure Geek
3708 posts

Uber Geek
+1 received by user: 88

Trusted
Microsoft NZ
Subscriber

  Reply # 754496 1-Feb-2013 17:31 Send private message

networkn: 

He said the taps outside will be supplied by the inside water supply which also sounded weird. 



i expect that means that the outside taps are split off *after* any pressure reducing valve that has been installed.  I split my water feed to the outside taps via a second pressure valve - not via the one that feeds the inside taps.  Turning on an outside tap doesnt impact the inside water pressure at all.  All the pipes to my outside taps use 25mm blueline pipe all the way to the fitting also (but the fittings are not 25mm throat so that limit their throughput)




Technical Evangelist
Microsoft NZ
about.me/nzregs
Twitter: @nzregs




7287 posts

Uber Geek
+1 received by user: 907

Trusted
Subscriber

  Reply # 754512 1-Feb-2013 18:02 Send private message

Regs:
networkn: 

He said the taps outside will be supplied by the inside water supply which also sounded weird. 



i expect that means that the outside taps are split off *after* any pressure reducing valve that has been installed.  I split my water feed to the outside taps via a second pressure valve - not via the one that feeds the inside taps.  Turning on an outside tap doesnt impact the inside water pressure at all.  All the pipes to my outside taps use 25mm blueline pipe all the way to the fitting also (but the fittings are not 25mm throat so that limit their throughput)


I presume you did that during the build or during a renovation? I think to do that now would be a major undertaking at our place.

1814 posts

Uber Geek
+1 received by user: 108


  Reply # 754515 1-Feb-2013 18:07 Send private message

networkn: 
Not sure what the pressure measurements were in. I think he was saying between the 450 (Street) and 400 (House) we were losing 50 whatevers, because of the long drive, but that doesn't really make sense to me, as once the pipe is full, pressure should be driven by the source. 

He said the taps outside will be supplied by the inside water supply which also sounded weird. Where would I install the pump? At the entry to the house, or just in the shower? We have a continuous gas heating system, will that interfere or cause issues?



Water is very much like electricity, there's always resistance to flow within (along) the conductor (read water pipe for water flow).  The longer the pipe the more resistance and also the smaller the pipe the greater the resistance. With no flow along the pipe the pressure will be the same anywhere along the pipe.  Once you start to flow water through the pipe you are going to see  a pressure reduction as you move further away from the pressure source, this is cause by friction within the pipe.  So yes it does make sense that there is a drop between the street and the house especially if you have a long driveway.

Were the figures Watercare measured water pressure or water flow?

As for a pump, unless your neighbours need pumps I consider it very unlikely you'd need one either.  In fact I'd be surprised if anyone being supplied by an outfit like Watercare would need a pump.

If Watercare consider the figure at your house adequate, assuming the Watercare person knew what they were doing, then I think you have a restriction somewhere in your plumbing.  Is there an isolating tap (toby) in or near the house that might be partially off?  Perhaps a pipe that is kinked of damaged?

I seem to recall you have mains pressure gas hot water.  Has this always been the case or has the gas system been retrofitted at some stage?  Is it possible that there was a previous system that required a pressure reducing valve and this valve is still in the system?  Does both the hot and cold water have poor flow?  If it's just the hot water then the gas system might be a possible cause other wise if both hot and cold are affected then I would think the gas hot water isn't your problem.




Nokia N9
Nokia E7
HP Touchpad
Dell Inspiron 14z i5

406 posts

Ultimate Geek
+1 received by user: 79


  Reply # 754518 1-Feb-2013 18:35 Send private message

Technofreak:

With no flow along the pipe the pressure will be the same anywhere along the pipe.



That maybe true for electricity, but with no flow, the higher a pipe travels the less pressure it has in it at the higher end. If it had a 5m elevated driveway to the house, you'll get you're 7PSI thereabouts pressure drop also.

1814 posts

Uber Geek
+1 received by user: 108


  Reply # 754527 1-Feb-2013 19:29 Send private message

kiwirock:
Technofreak:

With no flow along the pipe the pressure will be the same anywhere along the pipe.



That maybe true for electricity, but with no flow, the higher a pipe travels the less pressure it has in it at the higher end. If it had a 5m elevated driveway to the house, you'll get you're 7PSI thereabouts pressure drop also.


You are correct.  Part of the reason I asked whether the reading was pressure or flow was to determine what might be going on.

Other than as you mentioned with no flow there should be no pressure drop.  To me the most sensible comparison in this case would be flow.  I say this because if you measure pressure the reading doesn't mean much until there is flow. Then depending on how much flow there is and how close the pressure reading is taken to the flow outlet will depend on what pressure is measured, really then the pressure reading becomes a bit meaningless anyway.




Nokia N9
Nokia E7
HP Touchpad
Dell Inspiron 14z i5

1 | 2 | 3 | 4 | 5 | 6 | 7
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




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:





Trending now »

Hot discussions in our forums right now:

Government Limos
Created by networkn, last reply by Bung on 31-Oct-2014 12:39 (94 replies)
Pages... 5 6 7


Got a good ol parking fine
Created by Lyderies, last reply by blakamin on 1-Nov-2014 21:26 (28 replies)
Pages... 2


How good is your general Science Knowledge?
Created by Aredwood, last reply by freitasm on 1-Nov-2014 18:38 (48 replies)
Pages... 2 3 4


Shutup and take my money (via NFC on my mobile phone)
Created by sxz, last reply by sonyxperiageek on 31-Oct-2014 22:34 (24 replies)
Pages... 2


OneDrive code giveaway - go!
Created by freitasm, last reply by PhantomNVD on 1-Nov-2014 10:31 (36 replies)
Pages... 2 3


Uber: a cheaper taxi ride?
Created by kingdragonfly, last reply by livisun on 31-Oct-2014 14:47 (34 replies)
Pages... 2 3


Sky will be 'upgrading software' of My Sky to connect to internet. What does that mean?
Created by Geektastic, last reply by TwoSeven on 1-Nov-2014 17:43 (30 replies)
Pages... 2


DDos Protection from ISP
Created by charsleysa, last reply by freitasm on 31-Oct-2014 12:11 (46 replies)
Pages... 2 3 4



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.