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Pushing v pulling water
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RichardW



Joined: 24 Aug 2006
Posts: 8427
Location: Llyn Peninsular North Wales
PostPosted: Wed Apr 29, 15 4:46 pm    Post subject:  Reply with quote    

Long term think about changing to a fully pressured system.

Nick



Joined: 02 Nov 2004
Posts: 33857
Location: Hereford
PostPosted: Wed Apr 29, 15 6:08 pm    Post subject: Reply with quote    

RichardW wrote:
Long term think about changing to a fully pressured system.


Could you explain a bit more?

RichardW



Joined: 24 Aug 2006
Posts: 8427
Location: Llyn Peninsular North Wales
PostPosted: Wed Apr 29, 15 7:25 pm    Post subject: Reply with quote    

Basically you are converting your system to work the same as a mains system.

I am guessing that currently you have a pump in the well that feeds a header tank that then feeds the hot & cold systems via gravity.

Instead of that have it fill a large (ours is 1500L & external) storage container that then gravity feeds to a booster pump & pressure vessel (ours is 100L) (with one way valve) that then feeds your house cold supply at mains pressure. Then that is fed to the hot water system so the pressure at the taps is almost the same for hot & cold.

How you would do it exactly would depend on how you currently heat your DHW. I guess you now have a vented hot water tank so would at least need to change that for a mains fed one.

Nick



Joined: 02 Nov 2004
Posts: 33857
Location: Hereford
PostPosted: Wed Apr 29, 15 10:18 pm    Post subject: Reply with quote    

I've always worried that the cowboy who put the plumbing in relied on it being low pressure, and cranking it up would provide more problems than it solved.

You're assumptions are right, tho, mostly. Our pump isn't in the well, it's in the house and drags the water up, pretty well, and shoves it into header tanks in the loft. Everything is then gravity fed, except three showers and baths, on these pumps at the end of the line.

dpack



Joined: 02 Jul 2005
Posts: 34285
Location: yes
PostPosted: Thu Apr 30, 15 11:03 am    Post subject: Reply with quote    

upping the pressure might point out the shortcomings of various compression fittings,bad soldering etc etc ,a combo of low pressure and fur can hide many issues with pipes.sometimes just a bit of banging or sawing will show such problems as well.

the flexible nature of good modern plastic pipe systems might mean a full re plumb is possible and not too expensive if as i suspect the existing pipes have lots of sharp bends etc that might be the best long term plan.

vegplot



Joined: 19 Apr 2007
Posts: 21298
Location: Ynys Môn
PostPosted: Thu Apr 30, 15 11:12 am    Post subject: Reply with quote    

dpack wrote:
upping the pressure might point out the shortcomings of various compression fittings,bad soldering etc etc ,a combo of low pressure and fur can hide many issues with pipes.sometimes just a bit of banging or sawing will show such problems as well.


Don't let on. How on earth will Nick keep busy if he's not posting for help one issue at a time?

Behemoth



Joined: 01 Dec 2004
Posts: 19021
Location: Leeds
PostPosted: Thu Apr 30, 15 1:34 pm    Post subject: Reply with quote    

I suspect resolving one problem will reveal others that need sorting out. Plumbing's like that.

Nick



Joined: 02 Nov 2004
Posts: 33857
Location: Hereford
PostPosted: Thu Apr 30, 15 2:17 pm    Post subject: Reply with quote    

If only because saying something's done encourages other people to add to the to do list.

john of wessex



Joined: 18 Jun 2007
Posts: 2128

PostPosted: Thu Apr 30, 15 9:42 pm    Post subject: Reply with quote    

I don't know if you are familiar with the work of Porta, Chapelon et al but the phrase 'inner streamlining' comes to mind

Nick



Joined: 02 Nov 2004
Posts: 33857
Location: Hereford
PostPosted: Thu Apr 30, 15 9:57 pm    Post subject: Reply with quote    

john of wessex wrote:
I don't know if you are familiar with the work of Porta, Chapelon et al but the phrase 'inner streamlining' comes to mind


Even google is unaware of that phrase. I'm a little lost, but you think I should get an Argentinian based steam train designer to fix my plumbing?

dpack



Joined: 02 Jul 2005
Posts: 34285
Location: yes
PostPosted: Thu Apr 30, 15 10:54 pm    Post subject: Reply with quote    

how long does it take to run a nice warm bath on a south american steam train ?

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