[rtcleaningservices]

Evening all, Having trouble with my merlin filters, have recently moved them from a high pressure source (65psi) to a new source where the pressure is about 40psi and I've noticed that the filters have slowed considerably so I'm considering a set up using a HF5 low pressure membrane and 20" carbon and sediment filters.

I know some guys on here have the HF5's and just wondering what the general consensus is on them? are they quite economical on low pressure? roughly how much pure water will it produce per hour? How long do the membranes last roughly considering use of around 1500 litres of pure water per week? All told is it a good investment over the merlins i'm using currently?

Thanks in advance guys,

Artie

[[GQC] Tim]

Before answering your HF-5 questions, just a quick Q, did you change your prefilters on the Merlin? Might be time to change them.

[rtcleaningservices]

Before answering your HF-5 questions, just a quick Q, did you change your prefilters on the Merlin? Might be time to change them.

Hi Tim, I know the prefilter is due for changing but it's only about 3 months old, not massively overdue. I am going to try it but surely the carbon filter cannot make all that much differance? to overall speed??

[[GQC] Tim]

Before answering your HF-5 questions, just a quick Q, did you change your prefilters on the Merlin? Might be time to change them.

Hi Tim, I know the prefilter is due for changing but it's only about 3 months old, not massively overdue. I am going to try it but surely the carbon filter cannot make all that much differance? to overall speed??

Yes it sure does, it can slow production way down. You need to change both the sediment and carbon (if you have both on a Merlin, can't remember)

HF5 setups aren't cheap, so if you can get your production back up by changing a prefilter, I would definitely try that first.

[rtcleaningservices]

Before answering your HF-5 questions, just a quick Q, did you change your prefilters on the Merlin? Might be time to change them.

Hi Tim, I know the prefilter is due for changing but it's only about 3 months old, not massively overdue. I am going to try it but surely the carbon filter cannot make all that much differance? to overall speed??

Yes it sure does, it can slow production way down. You need to change both the sediment and carbon (if you have both on a Merlin, can't remember)

HF5 setups aren't cheap, so if you can get your production back up by changing a prefilter, I would definitely try that first.

Ah ok tim, will try it. Have priced up a HF5 and a kit with all the gubbins (membrane, housings and prefilters) is gonna cost me about £450 I reckon which is a lot but if it works well, money well spent. Would still like an honest opinion/review of the HF5 membrane though for future referance if nothing else!

Many thanks,

Artie

[cybersye]

I changed from a merlin to an hf5
have had it almost 18 months, production has remained consistent and had no problems with it producing 200 ltrs per hour at 50-60 psi with a product of about 12 ppm tds (tap about 300 ) and a 50/50 waste/pure ratio.
I flush it each time for about 10 mins and have changed the 10" pre filters twice in that time, probably produce about 1000 to 1500 ltrs per week.

As a comparison , the merlin used to produce a product tds of 35 ppm about 75 % being waste water and would produce 100 ltrs per hour and I would use a lot more resin.

For me the hf5 easily wins and has been well worth the investment
hope this helps
Simon