Welcome to the UK Window Cleaning Forums

Starting or own a window cleaning business? We're a network of window cleaners sharing advice, tips & experience. Rounds for sale & more. Join us today!

First RO filter change due

Messages
558
Location
Bicester
Hey guys

I've had my Facelift 350L van mount for a month at the end of next week so I'm due an RO filter change ready for the start of the month, but I'm not sure which replacement cartridges to buy?

So many options with varying prices so wanted to know what you all use? I use WCW as my supplier for everything so if you could post links to their site I would be grateful. I'm thinking I need a carbon and sediment 10" one without taking the RO housing off (2 vessels in my setup).

Any help is appreciated cos I don't want to end up buying the wrong ones!

I think it's these two:

Sediment Filters

Carbon Block Filters

Or:

Economy Pre-Filter 10

Cheers.

Chris

 
I looked at your van photos and can't see a picture of the prefilters, so I don't know if they are 10" or 20"

All you need i one sediment filter and 1 carbon block, either 10" or 20".

Some suppliers sell 3 filter sets, 1 sediment and 2 carbon block. You need to tell us how many prefilter housings you have before the r/o and what size they are.

No use buying a 3 set if you only have 2 filter housings, one which will be sediment, the first one.

.

 
I looked at your van photos and can't see a picture of the prefilters, so I don't know if they are 10" or 20"
All you need i one sediment filter and 1 carbon block, either 10" or 20".

Some suppliers sell 3 filter sets, 1 sediment and 2 carbon block. You need to tell us how many prefilter housings you have before the r/o and what size they are.

No use buying a 3 set if you only have 2 filter housings, one which will be sediment, the first one.

.
I looked at your van photos and can't see a picture of the prefilters, so I don't know if they are 10" or 20"
All you need i one sediment filter and 1 carbon block, either 10" or 20".

Some suppliers sell 3 filter sets, 1 sediment and 2 carbon block. You need to tell us how many prefilter housings you have before the r/o and what size they are.

No use buying a 3 set if you only have 2 filter housings, one which will be sediment, the first one.

.
Photo of the insides below :)

View attachment 8939

 
Why do you need to change them after only 1 month?

Look like 20" to me

Could always check with a ruler

You would need a sediment and a carbon block

Or just 1 fibredyne filter from Gardiners which is sediment and carbon block in one

 
you should not need to change them after 1 month, and they look like 20" filters to me. has your TDS gone up ?
My TDS is 360 out of the tap. When I bought it they recommended I change the RO filters once a month and the resin every 6 months. Then the membrane should be once every couple of years.

 
You should be able to get a few months from a set

I don't need to change mine as often as i do and i change mine 3 monthly roughly

Get the fibredyne one and that is good for 75000 litres which would be a long time for most people

 
You should be able to get a few months from a setI don't need to change mine as often as i do and i change mine 3 monthly roughly

Get the fibredyne one and that is good for 75000 litres which would be a long time for most people
Around 250L a day give or take but I fill it until the auto stop kicks in every night.

I don't want to burn out my resin for the sake of 20 quid on RO filters though. If the TDS rises on the outlet then surely the resin is done too?

 
I have inline sensors before and after ro so i know what my tap tds and ro out is

Pre filters actually make no difference to tds they protect the membranes from chlorine and other stuff therefore affecting performance as the membrane deteriorates

If you buy from a decent company there will be a guide to how many litres you can put through them before they are spent

 
Around 250L a day give or take but I fill it until the auto stop kicks in every night.
I don't want to burn out my resin for the sake of 20 quid on RO filters though. If the TDS rises on the outlet then surely the resin is done too?
You might not mind spending 20 quid and "prolonging your resin"

Change filters 3 monthly would be £80

Change filters monthly £240

How much is a bag of resin??

Up to you mate just saying they don't actually need changing that often

 
ur filters don't need changing then mate /emoticons/smile.png, how much pure water are you using a day ?, are you doing all WFP ?
I think you need to be careful advising that @slipknot. The prefilters are there to protect the membranes and do nothing to lower the tds of the incoming tap water.

The r/o will still be producing water at the same purity but you need to ensure that you change the filters before their service life is due. Once the carbon block stops removing chlorine, that chlorine will then start eating the membrane away. You won't know its doing it until its too late.

The Spectrum carbon block is good for 12000 liters. What you don't know is how much chlorine is in @C Rose Cleaning Services water supply at his tap. You have to presume the water contains the max chlorine and work to manufacturers specs. Maybe that his water has 1/2 the chlorine - in that case his carbon block could actually be good for 24000 liters.

If @C Rose Cleaning Services is using 300 liters a day, he will use 6600 liters of pure a month. If his waste to pure ratio is 2 to 1 then he is using 3 liters of water to produce 1 liter of pure. So on the same figures he will use 20,000 liters of water a month.

If this is so then the carbon filter needs to be changed every 16 days following the manufacturers specs. So sorry @slipknot his prefilters do need changing.

As per @daveyboy, I suggest Gardiners Fiberdyne as you get a longer service life.

20" Fiberdyne filters are good for 75,000 liters, so they would only need to be changed every 4 months.

.

 
Last edited by a moderator:
You should be able to get a few months from a setI don't need to change mine as often as i do and i change mine 3 monthly roughly

Get the fibredyne one and that is good for 75000 litres which would be a long time for most people
Around 250L a day give or take but I fill it until the auto stop kicks in every night.

I don't want to burn out my resin for the sake of 20 quid on RO filters though. If the TDS rises on the outlet then surely the resin is done too?

I think you need to be careful advising that @slipknot. The prefilters are there to protect the membranes and do nothing to lower the tds of the incoming tap water.
The r/o will still be producing water at the same purity but you need to ensure that you change the filters before their service life is due. Once the carbon block stops removing chlorine, that chlorine will then start eating the membrane away. You won't know its doing it until its too late.

The Spectrum carbon block is good for 12000 liters. What you don't know is how much chlorine is in @C Rose Cleaning Services water supply at his tap. You have to presume the water contains the max chlorine and work to manufacturers specs. Maybe that his water has 1/2 the chlorine - in that case his carbon block could actually be good for 24000 liters.

If @C Rose Cleaning Services is using 300 liters a day, he will use 6600 liters of pure a month. If his waste to pure ratio is 2 to 1 then he is using 3 liters of water to produce 1 liter of pure. So on the same figures he will use 20,000 liters of water a month.

If this is so then the carbon filter needs to be changed every 16 days following the manufacturers specs. So sorry @slipknot his prefilters do need changing.

As per @daveyboy, I suggest Gardiners Fiberdyne as you get a longer service life.

20" Fiberdyne filters are good for 75,000 liters, so they would only need to be changed every 4 months.

.
this is very helpful, thank you.

 
Hi C Rose, I'm going to throw a spanner in the works and say they look like 10" prefilters to me, what size is your RO? Just to be safe I would whip the tape measure out and check as - going off the size if the pump next to the housings - would suggest they are 10's?

Does your user manual not tell you?

I would consider putting a water meter on your main inlet if you don't have any way of measuring how much water you consume (pure+waste) since I fitted mine I don't tend to worry about filter changes as I wrote when they are due on a plaque next to the filters so I can have a quick look every now and then.

I would also consider fitting a clear bowl to your sediment pre- filter, I now purify water in two different locations. I'm not kidding when I say one filter will last me 6 months and the other (approx 5 miles away) needs changing monthly. Now I have clear bowls I can visually check without having to remove the fiddly cartridge - which is quite frustrating in some ways as can see how disgusting the water quality at school is!

Sent using the Window Cleaning Forums mobile app

 
Back
Top