Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Ian101 on August 15, 2011, 08:58:15 am

Title: Merlin 720 V 4040
Post by: Ian101 on August 15, 2011, 08:58:15 am

They both produce pure water but is one better than the other ?

Building another static system and currently run a boosted 4040 as tap pressure is 30psi  :(

HF5 needs 50psi as does Merlin 720 so either way it will need to be boosted.

Best price on a Merlin 720 I can see quickly looking at web is GAPS @ £239 .... anyone know cheaper ?

Title: Re: Merlin 720 V 4040
Post by: Paul Coleman on August 15, 2011, 01:28:52 pm

I run a 4040 HF5 on a bit under 40 PSI (unboosted) .  I wouldn't say it's optimum performance but I currently get about 80 litres an hour at around 015 TDS.  That tends to improve to about 100 litres per hour as low as 008 TDS after changing pre-filters.  I can get a better TDS if I tweak things but it uses more waste and I'm on a meter.

Title: Re: Merlin 720 V 4040
Post by: Smudger on August 15, 2011, 10:16:24 pm

Hi Ian - I've been using the Merling for nearly 2 years with booster pump - it's excellent for quick water - i make nearly 2000 ltrs overnight - but it is more wasteful so if your on a meter bear that in mind.

i believe the 4040 membranes are less wasteful and produce better quality water ( so less resin used ) BUT they are more expensive to put together.

that merlin price is excellent - remember that the carbon pre-filter should be changed every 6 months AND the recommend having an additional carbon pre filter if making large ammounts of pure

Darran

Title: Re: Merlin 720 V 4040
Post by: mikecam on August 15, 2011, 11:21:38 pm

Quote from: Ian101 @ H2o on August 15, 2011, 08:58:15 am

They both produce pure water but is one better than the other ?

Building another static system and currently run a boosted 4040 as tap pressure is 30psi  :(

HF5 needs 50psi as does Merlin 720 so either way it will need to be boosted.

Best price on a Merlin 720 I can see quickly looking at web is GAPS @ £239 .... anyone know cheaper ?

HF5 needs 70 PSI, Merlin needs 50 PSI. Replacement HF5 from Ionics is roughly £150.

Title: Re: Merlin 720 V 4040
Post by: Dave Turley on August 16, 2011, 07:48:21 am

My hf5 produces 130 lph at 40psi at 001 tds from 250 tds mains

To clarify, my tap pressure is 60psi with 40psi at the membranes, the remainder going to waste.

Title: Re: Merlin 720 V 4040
Post by: johnd on August 16, 2011, 03:20:28 pm

I have a used merlin for sale on ebay if anyone is interested  item no: 320744913636

Also a Brodex aluminium pole as im having a clear out.

aqua-services@hotmail.co.uk ;D