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Retirement and forum shutdown (17 Jan 2022)

Hi,

John Howell who has managed the forum for years is getting on and wishes to retire from the role of managing it.
Over the years, he has managed the forum through good days and bad days and he has always been fair.
He has managed to bring his passion for fish keeping to the forum and keep it going for so long.

I wish to thank John for his hard work in keeping the forum going.

With John wishing to "retire" from the role of managing the forum and the forum receiving very little traffic, I think we must agree that forum has come to a natural conclusion and it's time to put it to rest.

I am proposing that the forum be made read-only from March 2022 onwards and that no new users or content be created. The website is still registered for several more years, so the content will still be accessible but no new topics or replies will be allowed.

If there is interest from the ITFS or other fish keeping clubs, we may redirect traffic to them or to a Facebook group but will not actively manage it.

I'd like to thank everyone over the years who helped with forum, posted a reply, started a new topic, ask a question and helped a newbie in fish keeping. And thank you to the sponsors who helped us along the away. Hopefully it made the hobby stronger.

I'd especially like to thank John Howell and Valerie Rousseau for all of their contributions, without them the forum would have never been has successful.

Thank you
Darragh Sherwin

pressure pump for RO system

  • apistodiscus (apistodiscus)
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17 Apr 2007 06:29 #1 by apistodiscus (apistodiscus)
pressure pump for RO system was created by apistodiscus (apistodiscus)
Friend of mine lives in West Cork and his water comes from his own well. In other words the water pressure is pi** poor and not enough to force water through an RO system. Unfortunately he does need the RO unit since the nirate and phosphate reading in his water are quite high. Too much fertilizer being used in agriculture. The usual cause of these things.
Does anybody know where to get an inexpensive pressure pump for an RO system? He will need to get his pressure up to at least 3 bar and a maximum of 6 bar.
Cheers
Holger

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17 Apr 2007 07:06 #2 by tanks_alot (Denis Coghlan)
The best thing that I could suggest would be to use an old/new central heating pump. I don't think it would over pressure the system but I would think that it would be up or over the 6 bar mark. The thing about these pumps is that they are geared to slow flow and pressure rather then a high flow rate.


(this fella is going for €14 eueo on ebay)

It would be easy to install with a couple of lengths of hose before the RO unit and the electrical circuit that you would have to create would also be very simple. In addition to this if you splash out you can get a pump that you can regulate the flow on (see above). Have a look on ebay there are lots of old and new ones for sale.

Also I think that you could connect the tap flow directly to the pump.

What is your opinion?

Lead me not into temptation, For I can find it myself!

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17 Apr 2007 07:14 #3 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Anything over 6 bar will rip the membrane in a RO unit. Thanks for the tip though. The slow flow wouldn't be an issue but the pressure would.
See if the sellers can give me that info. Would definetly be cheaper than to buy one of the special RO unit pumps.
Connection to the RO unit isn't an issue since the RO unit came with an adapter that screws into an ordinary outside tap

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17 Apr 2007 07:38 #4 by tanks_alot (Denis Coghlan)
Just mad a look about on the net. The maximum pressure grundfos and wilo CHP go to is 10 BAR. The majority of the pumps can be regulated to three times less than this, therefore at their lowet setting you will be looking at 3-4 BAR. There is a site called Plumworld.co.uk that has stats on pumps. also www.cosy-heating.co.uk/pumps.html has pdf files on all the pumps they supply given details of flow rates, pressure etc...

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17 Apr 2007 07:49 #5 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Good man, cheers.
Just saved my buddy a bum.

Holger

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17 Apr 2007 12:39 #6 by russell (russell)
Replied by russell (russell) on topic RO
Hi Holger
RO man does a pump pressure booster that sits on the RO unit and boost the pressure the same way as the pressure washer. my mains is only 35 psi and I find this is enough. worth a look

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18 Apr 2007 01:57 #7 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Hi Russell,
how much does that pressure booster go for? I don't know if that will actually fith on the RO unit my buddy has. His is an MWS.
Holger

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18 Apr 2007 03:55 #8 by JohnH (John)
It's worth thinking about how much water is available in his well; last autumn I ran my well dry trying to fill up my fishpond and that was after only being running on half-powerfor around five hours!

Hence why I cannot have an RO unit here, with or without an auxiliary pump!

Your friend might find himself in a similar scenario, hope not for his sake....

John :roll:

Location:
N. Tipp

We're just two lost souls swimming in a fish bowl - year after year.


ITFS member.



It's a long way to Tipperary.

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19 Apr 2007 06:30 #9 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Hi John,
good point but I would imagine he's fairly safe and it's not like he will be needing hundreds of litres a week. The well never runs dry even in the hottest of summers whereas some of his neighbours had no water last year

Holger

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19 Apr 2007 08:22 #10 by russell (russell)
Replied by russell (russell) on topic RO
Hi All
Have a look at RO MAN uk site. there are some avaolable on there. also if you contact him with your problem he will advise.

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19 Apr 2007 08:38 #11 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Thanks Russell, will do

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19 Apr 2007 15:54 #12 by platty252 (Darren Dalton)
Aapisto, Your friend is obviously pumping the water from the well. Why dosent he increase the pump from the well.
As far as i know if he puts another pump on the same line the 2 pumps could work against each other.
If pump 1 from the well is pumping say 2000 lph and he installs a second pump on the same line pumping 3000 lph pump no.2 will be restricted on the intake and put a strain on the pump. I also think he would still only be pumping 2000 lph.
If he pumps from the well into a storage tank he could then use a second pump to pump as much as he liked as long as the tank didn't run dry.
I could be wrong but it's worth thinking about.

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20 Apr 2007 01:13 #13 by apistodiscus (apistodiscus)
Replied by apistodiscus (apistodiscus) on topic Re: pressure pump for RO system
Good point but I was thinking more along the lines of one of those booster pump I have in the upstairs bathroom. The water pressure was just crap and I couldn't have a shower standing up. Installed the pump and Have no problem since.

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