Ratio for making water

[Jason g]

Hi all
I have a Grippatank system full ro etc which is very slow to make water. It’s making about 20 litres per hour but with the booster pump it’s making 60 litres per hour however the waste is 120 litres per hour …. Is this normal and can it be adjusted ? Or is there a filter that will need replaced?
Thank you

 

[Part Timer]

If it's a 40/40 RO them, with a standard booster pump you should be producing circa 200 litres an hour.

 

[Jason g]

So I realise that it’s winter time and it takes longer to produce water but is my issue the ratio between pure and waste at 33/66 and if so can it be adjusted or what might the issue be?

 

[Part Timer]

I don't know the system but usually there's a valve to open / close to adjust waste to pure ratio

 

[Jason g]

It’s a Grippatank 850 ro/di pro system with v3 auto flush …. Anyone else know this system and whether it’s suppose to set the ratio thru the system or whether it can be adjusted manually?

 

[Mattymarske]

If it's anything like the xline system there's an inline gate valve that can be adjusted with flat head screwdriver to find the sweet spot of waste to pure ratio and tds. I've circled it in green. Not sure what yours looks like inside but should be able to trace the different lines.

 

[Jason g]

I’m wondering if this is it … anyone confirm?

 

[ched999uk]

I’m wondering if this is it … anyone confirm?

That tap looks closed but it could have a hole drilled to give the ratio.
If you follow the waste outlet back towards the RO waste outlet you should find an adjustable valve somewhere - unless it is a preset hole in a valve.
If it has auto flush it will have a bypass valve (electric one like @Mattymarske image on left and right) that is triggered to bypass the flow restriction.

Just a thought, have you had the system long? If you have there is a probability that the restrictor hole has worn bigger giving a higher waste ratio.

 

[Jason g]

I’m fairly sure the tap is in the correct position but the system in 7 years old so possibly your on the money with the restrictor hole having worn bigger over the years