[concept]

Right, a lot of you on here will have read and re-read my various trials and tribulations of my merlin system, and TDS issues, but I will add a quick brief to bring you up to speed, just before I sling it out the window and reverse over it a few times...

ok, so, to get you up to speed:

Source: 335
After RO: 79
After DI: 18

So, took advise on here and from a supplier, ordered new filter and membranes for merlin.

Fitted, ran system, resulting in TDS after RO @ 60-65.

Spoke to supplier, who advised me it could be my water pressure, as i was running standard garden hose to garage, then through system.

Moved system to outdoor tap, which runs just under 30psi.

Ran system for hours, and still resulted in TDS after RO @ 60-65.

Ended up taking the system up to Steve CM, who kindly ran the system up to see if it was a pressure issue, it made no difference at his place, still ran @ 65 TDS.

Spoke to supplier again, who advised pressure may be too low, and to run system off washing machine outlet in the house, as the pressure is around 40psi.

They kindly sent me some fixings for the tap, and the original pipework, to give me the best possible chance of building pressure up.

Hooked it all up to the 40psi tap this morning, been running it around half an hour now, and still coming out at TDS of 60+/-.

I really am about to give up here, as this is just getting beyond a joke.

I have been told that 40psi is enough to get the membranes operating effectively, but it appears not.

I have spent a lot of time and money on this system, and can't afford to replace it just yet, however, it appears I am at a loss with it if my water pressure isn't sufficient to get the TDS down.

A question...would a 4040 be ok off a 30psi outdoor tap?

[elite mike]

your going to need a booster pump

[concept]

recently bought a booster pump...doesn't work with a Merlin.

[d s windowcleaning]

i was told 35 psi was good enough for the merlins , perhaps your membrain aint seated properly and its letting some tap water through .

[concept]

i was told 35 psi was good enough for the merlins , perhaps your membrain aint seated properly and its letting some tap water through .

how can i check that?

[concept]

look at the price of them!!

surely I would be better off selling it and buying a 4040?! or something else.

[concept]

http://www.windowcleaningwarehouse.co.uk/shop/index.php/NEW-PRODUCTS/Aquatec-100psi-Pump/Detailed-product-flyer.html

This is a great piece of kit.

Not that expensive.

no doubt wont work with a merlin...so frustrated right now, got jobs to do next week, and no pure water production.

[R W C]

I got 4040 from purefreedom and my pressure in my old house was 30psi, my tap tds 290, after ro 005, id sell it and if you have enough money get hf5 a 6 month old one recently sold on ebay for £62

[concept]

http://cgi.ebay.co.uk/ro-man-reverse-osmosis-300gallen-a-day-filter_W0QQitemZ120451491952QQcmdZViewItemQQptZUK_Pet_Supplies_Fish?hash=item1c0b77e870&_trksid=p3286.c0.m14&_trkparms=65%3A12%7C66%3A2%7C39%3A1%7C72%3A1686%7C293%3A1%7C294%3A50

would something like that be ok?

i need to fill a 650l tank roughly every 2 days.

[GWCS]

merlin pressure needs to be at least 60 psi for approx 20 degrees temp.

[concept]

merlin pressure needs to be at least 60 psi for approx 20 degrees temp.

thats done it for me, can't be doin with messing around, pumps that need shutting off every hour etc etc...

just want to produce water, reliably.

[elite mike]

merlin pressure needs to be at least 60 psi for approx 20 degrees temp.

thats done it for me, can't be doin with messing around, pumps that need shutting off every hour etc etc...

just want to produce water, reliably.

this is what you need then

Reverse Osmosis Kit with RO Ultratec HF5-4040 membrane
This kit is identicle to the reverse osmosis kit above but uses the new revolutionary RO UltraTec HF5-4040 membrane instead.

This membrane is ideally suited to applications below 50 psi or where quick filling times are needed.

The HF5-4040 has much greater flow rates at lower pressure without loss of water quality than all other extra low pressure membranes (eg FilmTec XLE-4040, Hydranautics ESPA4-4040, Osmonic Desal AK4040 etc..). In almost all instances this membrane will negate the need for a pump making it an economical choice for any who need good quality water fast no matter what the inlet pressure.

The response from window cleaners up to now has been brilliant - everyone has been amazed at the sheer volume of water produced from a single 4040 membrane.

Price: £524.00 (£602.60 Including VAT at 15%)

[concept]

ouch....where's that from mike?

cheers for advice...wish i had gone down this route to begin with!!!

[elite mike]

sorry mate

  www.gapswater.co.uk/

[concept]

they're on holiday now...

[elite mike]

recently bought a booster pump...doesn't work with a Merlin.

why does it not work with the merlin

[concept]

can't remember what purefreedom told me...

the lad did loads of research into what else was available, and basically there was only one that was compatible, and it was limited to 1 hours use at any one time...

[elite mike]

is it a 12v pump

[concept]

not sure.

why do you ask?

[elite mike]

i cannot see why i would not work

try hooking it up between your water supply and merlin

i think you will be pleasantly surprised