Moving to WFP wirth limited space...

[Bart90]

when you get a reading out the 2nd di then replace resin in the first and swap them round

You mean when it starts reading above 0ppm then replace and swap?  

What are these pre filters i've heard of? Are they needed?

Thanks so much for the info guys, really appreciate it.

 

[Iron Giant]

With a tap tds reading of 200 you need an RO not DI vessels as you will go through resin fairly quickly even if a double di set up you might spend £50-80 a month of resin. I have a tap tds range of around 45-75ppm and I was spending over £300 a year on resin, I bought a RO from Daqua for £180. 

Lads on here living in a hard water area my advise you better on what RO to get to best serve you longterm along with been cost effective or phone @doug atkinson of http://daqua.co.uk first thing Monday and ask him what would be best.

 

[Bart90]

With a tap tds reading of 200 you need an RO not DI vessels as you will go through resin fairly quickly even if a double di set up you might spend £50-80 a month of resin. I have a tap tds range of around 45-75ppm and I was spending over £300 a year on resin, I bought a RO from Daqua for £180. 

Lads on here living in a hard water area my advise you better on what RO to get to best serve you longterm along with been cost effective or phone @doug atkinson of http://daqua.co.uk first thing Monday and ask him what would be best.

Is this still valid as I'm only using it for up to 60 houses per month and upstairs only?  We're not talking a full round to wfp so thinking resin would not break the bank and be a great way to just get started on wfp and limited space.

 

[Dr Von Samstein]

RO is definitely best option if you are not on a water meter. I live in a flat and am on a water meter. My tds is 250ppm. I have double di in the van so I filter water slowly on demand. This is my maths to make 1000 litres of pure water from my experience

Double di:

1000 litres of water £4 (price from Severn Trent)

Resin cost to filter 1000 litres £12 (this is based on me averaging 10 days work from 16 litres of tulsion resin and using average 350 litres water per day)

Total for 1000 litres = £16

Ro:

3000 litres water (ratio of 1:2 pure:waste) £12

Resin cost to polish - maybe 80p per 1000 litres depending on quality of membrane

Cost to replace membranes - not sure

Total for 1000 litres = £12.80

So you can see you pay a premium for resin, but for me paying the extra works out at an extra £1 per day. For me it's absolutely worth the convenience of being able to top up the tank quickly. I know that changing the resin is a pain, but living in a flat with no space I can't realistically have an RO.

This is just my experience so it may not be right or may not be the same for you

If you are only doing 60 upstairs a month resin will last you for ages. And I know everyone has different experiences but I've got good things to say about refurbished Di from eBay. Maybe they are codged together, but at least that way it matches the rest of my system ;-)

 

[Bart90]

RO is definitely best option if you are not on a water meter. I live in a flat and am on a water meter. My tds is 250ppm. I have double di in the van so I filter water slowly on demand. This is my maths to make 1000 litres of pure water from my experience

Double di:

1000 litres of water £4 (price from Severn Trent)

Resin cost to filter 1000 litres £12 (this is based on me averaging 10 days work from 16 litres of tulsion resin and using average 350 litres water per day)

Total for 1000 litres = £16

Ro:

3000 litres water (ratio of 1:2 pure:waste) £12

Resin cost to polish - maybe 80p per 1000 litres depending on quality of membrane

Cost to replace membranes - not sure

Total for 1000 litres = £12.80

So you can see you pay a premium for resin, but for me paying the extra works out at an extra £1 per day. For me it's absolutely worth the convenience of being able to top up the tank quickly. I know that changing the resin is a pain, but living in a flat with no space I can't realistically have an RO.

This is just my experience so it may not be right or may not be the same for you

If you are only doing 60 upstairs a month resin will last you for ages. And I know everyone has different experiences but I've got good things to say about refurbished Di from eBay. Maybe they are codged together, but at least that way it matches the rest of my system ;-)

Really helpful, thanks Sam

 

[Dan Paton]

RO is definitely best option if you are not on a water meter. I live in a flat and am on a water meter. My tds is 250ppm. I have double di in the van so I filter water slowly on demand. This is my maths to make 1000 litres of pure water from my experience
 
Double di:
1000 litres of water £4 (price from Severn Trent)
Resin cost to filter 1000 litres £12 (this is based on me averaging 10 days work from 16 litres of tulsion resin and using average 350 litres water per day)
Total for 1000 litres = £16
 
Ro:
3000 litres water (ratio of 1:2 pure:waste) £12
Resin cost to polish - maybe 80p per 1000 litres depending on quality of membrane
Cost to replace membranes - not sure
Total for 1000 litres = £12.80
 
So you can see you pay a premium for resin, but for me paying the extra works out at an extra £1 per day. For me it's absolutely worth the convenience of being able to top up the tank quickly. I know that changing the resin is a pain, but living in a flat with no space I can't realistically have an RO.
 
This is just my experience so it may not be right or may not be the same for you
 
If you are only doing 60 upstairs a month resin will last you for ages. And I know everyone has different experiences but I've got good things to say about refurbished Di from eBay. Maybe they are codged together, but at least that way it matches the rest of my system ;-)

Hi Sam . My tds is virtually the same as yours. How often at 350 litres a day do you have to change the resin in the vessel nearest the tap before you move it to the front. I seem to be going through shed loads of tulison at the moment. The last time I changed resin in the rear vessel I only got around 600 litres.


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[Dr Von Samstein]

When I swap them over I probably get around 800-1000 litres before it goes up to 001, but then it takes another 2500 litres for it to climb up to 250, and that's when you switch them around and refresh that resin. 

Because I knew I would use a lot of resin I bought 2 X 19 litre di so I don't have to change as often. 2 x 25 l of tulsion = 50. 50÷ 3 = 16.6666. so if I put 16 litres in my Di I get 3 fills for 2 bags of resin

 

[Bart90]

Hi guys. I'm going to go for the Daqua ready filled 11L DI vessels, i think they're about £90 a piece.  What else do i need?

I know I need some garden hose, where do you guys buy this cheaply and how much do you buy?(i'm doing a twin DI setup)   And what about connectors for the hose onto the DI's?  Do you just go to homebase for hoselock type ones?  or is there somewhere cheaper online?  

anything else i need?

 

[Clisty1989]

Hi guys. I'm going to go for the Daqua ready filled 11L DI vessels, i think they're about £90 a piece.  What else do i need?

I know I need some garden hose, where do you guys buy this cheaply and how much do you buy?(i'm doing a twin DI setup)   And what about connectors for the hose onto the DI's?  Do you just go to homebase for hoselock type ones?  or is there somewhere cheaper online?  

anything else i need?

b&m, hose, connectors etc cost you a tenner in total

 

[Bart90]

Morning guys,

So my Black DI filters from Daqua have arrived, look really solid.  Off to B&M shortly to get the connectors and hose etc but.....how do i get into them to see resin/change it?  Does the piece on the top just unscrew?  Don't want to put too much force on it in case it doesn't but can't see another way it would open up......

 

[Dr Von Samstein]

I'm bringing up this old post because I still agree with what I said about resin costs, however I just bought an ro! I found that our outdoor tap is unmetered. Still need to paint the board and get a proper clamp for the prefilter and possibly a smaller Di

just after a little bit of advice - how do you go about preparing for winter with ro onboard? I park next to wall of building so i normally notice only half the windscreen ices over, do you think lagging all the pipes and wrapping the ro up in a blanket or something similar would be enough? Or do I need an oil radiator every night? 

Also, I've got a booster pump, does anyone know how to adjust the output pressure? I haven't had much time to play with it yet but it didn't seem to push the pressure up that much

 

[spruce]

I'm bringing up this old post because I still agree with what I said about resin costs, however I just bought an ro! I found that our outdoor tap is unmetered. Still need to paint the board and get a proper clamp for the prefilter and possibly a smaller Di

just after a little bit of advice - how do you go about preparing for winter with ro onboard? I park next to wall of building so i normally notice only half the windscreen ices over, do you think lagging all the pipes and wrapping the ro up in a blanket or something similar would be enough? Or do I need an oil radiator every night? 

Also, I've got a booster pump, does anyone know how to adjust the output pressure? I haven't had much time to play with it yet but it didn't seem to push the pressure up that much

View attachment 11513

You could throw an old duvet over the tank and r/o. A full tank of water will help to keep the r/o from freezing up.

If you have a booster pump then it will be 230v. If you park next to a building and going to use the booster pump then you will have to sort power out for that. A small oil filled radiator with a frost setting will keep the van from getting too cold.

You have to be more careful with a stainless steel r/o housing. They look good but loose heat quicker than a 'plastic' composite housing does.

You have 1 prefilter. I hope that's a carbon block in there and not just a sediment filter.

There are numerous booster pumps available on the market. Some, like the one from Purefreedom, have a bypass feature so the operator can regulate the pressure boost. Others have nothing.

What booster pump have you got?

 

[Dr Von Samstein]

This is the plate from the booster pump.

i am planning to install van ports and then put the booster pump outside the van on the floor with the extension cord through the window. We are a first floor flat and in the winter it will be absolutely freezing if we leave a window open with wire going outside to van. 

It it came with 2 prefilter housings but I removed one and installed a brand new gac filter

 

[spruce]

This is the plate from the booster pump.

i am planning to install van ports and then put the booster pump outside the van on the floor with the extension cord through the window. We are a first floor flat and in the winter it will be absolutely freezing if we leave a window open with wire going outside to van. 

It it came with 2 prefilter housings but I removed one and installed a brand new gac filter

View attachment 11514

I think you need to get in touch with All Pumps Direct and ask them if this can be used as a booster pump. There has to be some pressure behind it as it says it has a max head of 67m. Their graph indicates a max pressure of 550kpa (80psi) so I can't see why this doesn't translate into much of a difference unless you already have good water pressure. The max amount of water you will need for your r/o to function is 9lpm, probably a little less. (At 50psi tap water pressure mine uses 4lpm - 2 lpm of pure and 2 lpm of waste with an HF5 membrane.)  Maybe you don't need the bother of a booster pump.

What I would be concerned about is that the pump housing is cast iron and that rusts, even although they say its coated with an anti corrosive coating. So each time you use it you will need to flush it well before connecting it up to the system just to make sure that anti corrosive coating hasn't broken down.

I have a GAC 20" filter under my desk. It has a label on it with a service life of 2500 gals. If that's US gallons then that equates to 10000 liters. That will also include the waste product water. If you have you r/o set to 50% waste 50% pure then you will get 5000 liters of pure from that filter. This is why I went the Fiberdyne route as a 20" filter is good for just over 75,000 liters.

 

[Dr Von Samstein]

Sorry about the confusion, I meant fiberdyne. I got it from Gardiner. 

This pump has a big attachment on the top like most booster pumps you see, I will try and sort a picture out soon. Tbh I've been wondering if I need the booster pump. It was second hand from a guy that used to run an aquarium, he said it's just 6 months old but he would run it almost every day for a couple of hours