[Stephen burton]

Just bought a brand new booster pump but doesn't have any instructions, I'm guessing it goes before the Ro unit, my only problem is that the plastic pipe coming from the mains is too thick to fit in the pump Inlet and outlet

[M & C Window Cleaning]

Mine is fitted before the prefilters because it is a spare sureflo pump that I've used with a motor controller to reduce the volume output, but I think the one you have is supposed to be fitted after the prefilters but before the RO. From your picture it looks like the right connections for that.

[paulben]

Take pipe from after pre filter and connect it to inlet booster pump . Pipe from outlet on booster pump goes to inlet on membrane housing

[Stephen burton]

Cheers for reply, I'm having problems I fitted the pump before the membrane but still not getting anymore pressure any ideas please

[Don Kee]

Daft question, have you put the inlet & outlet the right way around?

[M & C Window Cleaning]

Did you check that the pump was working before you plumbed it in?
What was your mains pressure before you fitted the pump?
Has your RO got a pressure gauge and if so did you plumb it in before or after the gauge? If you plumbed it in after, the gauge wont see the increase in pressure.

[Stephen burton]

I'm sure it's in the right place, it's after pressure gauge so I timed filling a jug up with pump and without the difference was about 20 seconds, my pressure currently is 35-40 and the pump is suppose to produce 70 so nearly double. Very confused what to do next

[M & C Window Cleaning]

Is it possible to fit it before the pressure gauge? You could get some idea then as to it's actual output pressure.

[Stephen burton]

This is my set up is

Is it wrong

[M & C Window Cleaning]

Hope you can see the photo. You have the same unit as me. Try removing the bit I've circled in red. If memory serves it is surplus to requirement. I took mine off at the start with no problems.  Just run the waste straight down the drain after the restrictor and the other pipe straight into your booster pump and see how that goes.

[Stephen burton]

I removed the plastic square part u circled in photo, still the same, I thought perhaps I have put the inlet and outlet wrong on pump, I switched them about and my pressure gauge went upto 65 but no water was coming out so I can't do anymore I don't think

[M & C Window Cleaning]

If the pump is plumbed in after the pressure gauge, then the gauge wont see the pressure from the pump. If it does then it is plumbed in backwards and that is why no water is  coming out.
Are there no markings on the pump to indicate which way the water should flow through it?  Inlet, outlet etc? You can check anyway by disconnecting it from your RO leaving the hoses connected to the pump, and putting one hose in a bucket of water and switching it on. If it blows bubbles that is the outlet and if it sucks up and spits water out the other end, its the inlet.
When you plumb it back in try to do it before the gauge. If you can then you can see what the pressure is with it switched on and off and compare water flow accordingly.
You can leave out the bit you removed that I circled in red as it is only needed if you are filling a pressure vessel for drinking water and are using a faucet. It's a hydraulic cut off valve.

[Stephen burton]

This is where my connection is so it should show on pressure gauge, I plumbed it in like you said and left pipe in bucket before Ro and it comes out there fine

[M & C Window Cleaning]

From what I can see in your last photo, the booster pump is in the right place, however, it will only show the mains pressure on the gauge as the gauge is before your booster pump. It's not a problem because it won't stop the pump doing it's job. You just won't be able to read the pump pressure. To do that you would need to configure your pipework slightly differently. You would need to fit an elbow piece to the back of the canister in your picture and run the pipe into your pump. then between the pump and the RO you would need to fit a 'T' connector, and connect the gauge at that point. Unfortunately the thread size in the canister and the RO are different so you can't swap them over. At least they are on mine.
Beyond that I don't know what to suggest. I think the 300gpd advertised is only achievable in absolutely optimal conditions, whatever they are. I've got a permeate pump attached to mine as well and it just about keeps up with me.

[Stephen burton]

What booster pump have you got and what is the psi output

[M & C Window Cleaning]

I'm using a second hand Sureflo 100psi pump with a spare digital flow controller to reduce the output as it's way to high otherwise. The controller is set to between 2 and 3 on the dial. It is fitted between the mains and the whole unit. I'll post a photo when I get a chance.

[Stephen burton]

Thanks for your help I have just emailed the company I got it from and they said it is a mismatch and won't support my system

[Spruce]

30 psi and 0.85 lpm (less than a liter per minute). No wonder it won't work.

[Stephen burton]

Where did u get that info from spruce

[M & C Window Cleaning]

Thanks for your help I have just emailed the company I got it from and they said it is a mismatch and won't support my system

Was that the company you got the booster pump from? Because if it was - and I stand to be corrected - it sounds like a fob off. That RO unit is advertised, if memory serves, as being able to be used with a mains pressure up to 100psi. If your mains supply can't deliver it and your pump can, then there shouldn't be a problem.