Ro flushing help

[francie]

Let it settle in for a few days and then see what you r/o is doing.

Thank you lads for info il post in few days time.

 

[francie]

Lads what connections are you using, i got hozellock but the connection keeps flying of the tap, couldnt be to much pressure would it?

 

[spruce]

Lads what connections are you using, i got hozellock but the connection keeps flying of the tap, couldnt be to much pressure would it?

I would change the plastic Hozelocks for brass where ever possible. Where this isn't possible, then John Guest fittings are pretty good.

 

[spruce]

@francie. We never answered your question about adjusting pure to waste ratio.

I didn't answer that as I don't know how Collins water restrict that. I think @Dave B has one so he will probably enlighten you better than I can.

If you look on your waste pipe going to the drain there should be some sort of restrictor there somewhere. It maybe in the form of a tap or perhaps a inline 'preset' cartridge restrictor.

They show these on their site but nothing else

http://www.collinswaterproductsltd.co.uk/ourshop/prod_5997167-14-inline-stop-tap.html

If they use these taps then when you open it fully its in flush mode and when you nearly close it you are in production of pure water mode. At your tap water tds I would aim for around 1 to 2 waste to 1 pure.

RoMan sell inline restrictors and flush valves but they are preset at 3 waste to 1 pure. Here's an example of the restrictor

http://www.ro-man.com/shop/membranes-flow-restrictors-and-upgrade-kits/flow-restrictors/150-gpd-flow-restrictor-3-1.html

Here's an example of a restrictor and flush valve kit.

http://www.ro-man.com/shop/flush-kit-150-gpd-ro-systems.html?search=flus&page=2

@Dave B has made himself on comprising of 2 taps. If you look at the Ro-Man flush kit, he has removed the restrictor and fitted an on/off tap and kept the tap below. The top tap is set and never adjusted, but the bottom tap is opened to flush and closed to produce pure.

 

[Dave B]

@francie. We never answered your question about adjusting pure to waste ratio.

I didn't answer that as I don't know how Collins water restrict that. I think @Dave B has one so he will probably enlighten you better than I can.

If you look on your waste pipe going to the drain there should be some sort of restrictor there somewhere. It maybe in the form of a tap or perhaps a inline 'preset' cartridge restrictor.

They show these on their site but nothing else

http://www.collinswaterproductsltd.co.uk/ourshop/prod_5997167-14-inline-stop-tap.html

If they use these taps then when you open it fully its in flush mode and when you nearly close it you are in production of pure water mode. At your tap water tds I would aim for around 1 to 2 waste to 1 pure.

RoMan sell inline restrictors and flush valves but they are preset at 3 waste to 1 pure. Here's an example of the restrictor

http://www.ro-man.com/shop/membranes-flow-restrictors-and-upgrade-kits/flow-restrictors/150-gpd-flow-restrictor-3-1.html

Here's an example of a restrictor and flush valve kit.

http://www.ro-man.com/shop/flush-kit-150-gpd-ro-systems.html?search=flus&page=2

@Dave B has made himself on comprising of 2 taps. If you look at the Ro-Man flush kit, he has removed the restrictor and fitted an on/off tap and kept the tap below. The top tap is set and never adjusted, but the bottom tap is opened to flush and closed to produce pure.

That is what i did mate

It comes with the 450gpd restrictor with the pushfit connections to connect the hose 

I replaced the restrictor with a 2nd tap and have that set and doesn't move to make my waste to pure ratio about 60 waste 40 pure without affecting output tds really

I use the other tap to flush 

The Collins one looks like this @spruce

 

[francie]

Thanks lads for the info, theres a flush on it it iv it closed fully now i have a quick look.

Thanks lads for the info, theres a flush on it it iv it closed fully now i have a quick look.

Yeah we blue tap on the flush, can i adjust that for my ratio?

 

[spruce]

Thanks lads for the info, theres a flush on it it iv it closed fully now i have a quick look.

Yeah we blue tap on the flush, can i adjust that for my ratio?

Yes, but you must never close it completely as you will damage your membranes.

 

[francie]

Yes, but you must never close it completely as you will damage your membranes.

Thanks lad didnt know that.

 

[Dave B]

Thanks lad didnt know that.

That is only if you have it set up like mine

If you have the inline restrictor that does the same job as leaving the tap open a bit 

It is specifically set to the optimum ratio for the size of ro although i prefer not to use them as it creates too much waste

4040 etc have no restrictor so need managing like that and you can never shut the tap fully

 

[CHWS]

Yes, but you must never close it completely as you will damage your membranes.

So it should not be completely closed when making pure ??

 

[spruce]

So it should not be completely closed when making pure ??

No. Never ever.

As you are making pure the membranes are removing the dissolved solids from your water. Those dissolved solids need to be flushed away as they are removed. If you don't do that then your membranes will clog up with those particles rendering the membrane unusable.

When you flush you open the tap full so almost all the tap water passes through the membrane and goes to waste taking any remaining solids with it.

When you have finished flushing you then partially close the tap so you are getting equal parts of waste to pure. If you tap water tds is high then you might go for a slightly high ratio of waste to pure, say 2 parts waste to 1 part pure (2 liters of waste to 1 liter of pure.)

I can't believe the supplier didn't give detailed operating instructions with the r/o they supplied. Who supplied the r/o?

 

[Philip]

I always flush before I start making pure water. Open the valve turn the water tap on leave it for a few minutes until it shows 0ppm then turn the valve 3/4 closed and then it usually takes 8 to 9 hours to fill my 350l tank.

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[Den]

I have put bypass valves on mine to combat tds creep.

 

[CHWS]

No. Never ever.

As you are making pure the membranes are removing the dissolved solids from your water. Those dissolved solids need to be flushed away as they are removed. If you don't do that then your membranes will clog up with those particles rendering the membrane unusable.

When you flush you open the tap full so almost all the tap water passes through the membrane and goes to waste taking any remaining solids with it.

When you have finished flushing you then partially close the tap so you are getting equal parts of waste to pure. If you tap water tds is high then you might go for a slightly high ratio of waste to pure, say 2 parts waste to 1 part pure (2 liters of waste to 1 liter of pure.)

I can't believe the supplier didn't give detailed operating instructions with the r/o they supplied. Who supplied the r/o?

Mines is a colins ro. It just had instructions on setting it up. It never mentioned about leaving the flush tap slightly open. Mines been fully closed  :57_cry:

 

[Dave B]

Mines is a colins ro. It just had instructions on setting it up. It never mentioned about leaving the flush tap slightly open. Mines been fully closed  :57_cry:

Yours is the one i have that i was talking about

You have a white plastic cylinder on the top of the metal bracket in the same pipe as the flush tap

That does the job of leaving the flush open a certain amount and the idea ia you fully close the tap and the valve lets the right amount of water through the waste

Mine was the same but not on the bracket when i took that pic..now i have replaced the plastic flow restrictor with a tap so i have it set where i want it

Spruce has a 4040 i believe and previously had a Collins type but must have had it set up like mine

 

[CHWS]

Yours is the one i have that i was talking about

You have a white plastic cylinder on the top of the metal bracket in the same pipe as the flush tap

That does the job of leaving the flush open a certain amount and the idea ia you fully close the tap and the valve lets the right amount of water through the waste

Mine was the same but not on the bracket when i took that pic..now i have replaced the plastic flow restrictor with a tap so i have it set where i want it

Spruce has a 4040 i believe and previously had a Collins type but must have had it set up like mine

Happy days that'll save me forgetting to leave it open a bit lol

 

[Dave B]

Yours will be set up the same as this but on the metal bracket under the membrane housings

The way it works is when you open the tap the water flows through that side of the loop fast and flushes the membranes

Close the tap and the waste can only go through the restrictor which has a tiny hole which allows it to flush waste at a pre set rate

I prefer to swap it with another tap as i can set the waste lower as it is about 3 waste to 1 pure with the reatrictor

 

[CHWS]

Is that mine to the right of the flush tap

 

[Dave B]

Yeah

I took it all off the bracket as i fitted it in an insulated heated cabinet and only use the 1 prefilter so no need for the rest of it

 

[CHWS]

Yeah

I took it all off the bracket as i fitted it in an insulated heated cabinet and only use the 1 prefilter so no need for the rest of it

Why do you only use the one pre filter ? 

 

[Dave B]

The granulated carbon one (gac) does the same job as the carbon block so not needed although they wouldn't last long on their own compared to the block

The sediment filter is unnecessary for me as my water doesn't have any..i can use the same sediment filter for 6 months and it still won't change colour as it is not dirty

I am on my last couple of carbon blocks and then will be replacing it with a fibredyne sediment/carbon all in 1 filter which is about 12 quid off Gardiners but lasts a lot longer and won't restrict flow as much

I don't know if i am right but i am sure if you use 1 pre filter instead of 3 the water must go through to the membranes quicker as not so much pressure needed to force it through 3 filters

It seems quicker with just the 1

@spruce what do you think?