PSI flow rate, how about these?

[slippy]

I measured my outside tap at flats on a screw on meter.  It said 73 PSI or bar 5.  Is that pretty good? And kpa was 520, whatever kpa means.

How do flow and psi affect an ro differently?

 

[Marko067]

73psi is pretty good for mains pressure. Mine is only about 40psi so I have to boost it to get the best out of my RO. I boost it to about 75psi to get good results.

 

[slippy]

On one of these it'sshowing 72 psi.  These things accurate? 

View attachment 10376

 

[Spartan]

i bought one yesterday and it read 65psi which is about right for mains pressure i think.

I'm hoping that will produce enough water quickly for an RO system - i really don't want it ti take hours and hours to fill. :1f61e:

 

[Den]

i bought one yesterday and it read 65psi which is about right for mains pressure i think.

I'm hoping that will produce enough water quickly for an RO system - i really don't want it ti take hours and hours to fill. :1f61e:

I have a 450gpd and my pressure is 65psi it take approx 24hours to fill 1000l ICC tank.

 

[Dave B]

i bought one yesterday and it read 65psi which is about right for mains pressure i think.

I'm hoping that will produce enough water quickly for an RO system - i really don't want it ti take hours and hours to fill. :1f61e:

That is good water pressure

Mine is 73psi but i am lucky

Others in the same area have 30 ish psi

 

[slippy]

I used that same device on the end of an x hose on kitchen tap and it went up high as well.  Planning on getting a 40 40 ro.

 

[Spartan]

I have a 450gpd and my pressure is 65psi it take approx 24hours to fill 1000l ICC tank.

24 hours!!!! :1f632:

flipping heck! i hope mine takes way less then that or it wont be any use...

Is there a calculation you can use to work out the length of time?

 

[Den]

24 hours!!!! :1f632:

flipping heck! i hope mine takes way less then that or it wont be any use...

Is there a calculation you can use to work out the length of time?

Yes a clock lol, I timed mine at approx 500l in twelve 12 hours we only use between 500 and 600 litres a day my system as a auto shut off valve so I can leave mine over night if need be.

if you are going to need a lot more you could get a 4021 or 4040 RO I will probably upgrade myself in the future but my little 450gpd is doing a good job at the moment. I fill my van and drums every night then from a static Ibc tank then just turn my water back on and auto shuts down when filled. 

 

[spruce]

Pressure and flow are related but not the same.

 

[BigFoot]

I will need to run a hosepipe 35ft from my tap to my Ro system will this adversely effect my psi or results on my pure production?

 

[Dave B]

There is a formula to work it out somewhere online but i wouldn't worry

I run my ro in a box on the side of my shed at the very bottom of my garden and the tap is on my house wall amd i have no noticeable pressure drop

 

[Spartan]

There is a formula to work it out somewhere online but i wouldn't worry

I run my ro in a box on the side of my shed at the very bottom of my garden and the tap is on my house wall amd i have no noticeable pressure drop

The RO would be in the van rather then in shed/garage.

Was wondering if there was a calculation to work out how long it would take to purify.

My TDS is about 320, I would need to produce about 350-400 litres per day.

I live in a terrace house and can't really have the hose trailing to the van all night, just not feasible...

 

[Dave B]

You realistically would need a 4040 then as you can make about 2l per minute 

 

[Spartan]

Cheers Dave, that would take me approximately 3 hours+ to purify then, if I can get 2 litres per minute.

That's certainly doable, hookup about 4 or 5pm, all done by about 7 it 8pm.

Now the search for a quality 4040 starts... :1f644:

Might have to go for an 'all in system'....

 

[Part Timer]

Cheers Dave, that would take me approximately 3 hours+ to purify then, if I can get 2 litres per minute.

That's certainly doable, hookup about 4 or 5pm, all done by about 7 it 8pm.

Now the search for a quality 4040 starts... :1f644:

Might have to go for an 'all in system'....

I have a booster pump in the van, I plug it in on an extension cable, and I can produce approx. 300 litres an hour.

 

[Spartan]

I have a booster pump in the van, I plug it in on an extension cable, and I can produce approx. 300 litres an hour.

A booster sounds like it's what I would need.

Hoping to get a K-system.... can't find much feedback about them, not even on this site

 

[slippy]

On 2017-6-10 at 12:12, spruce said:

Pressure and flow are related but not the same.

So pressure is the power and flow the speed?

 

[Spartan]

So pressure is the power and flow the speed?

I would have said that the flow is the volume of water, the amount of water you get.

 

[kevinc250]

A booster sounds like it's what I would need.

Hoping to get a K-system.... can't find much feedback about them, not even on this site

not many people bought the k stystems when they first came out spartan,if memory serves me right they started to get the reputation brodex had as in not answering phone calls or missing parts etc.

i honestly thought they'd pack it all up years ago.

 

[spruce]

So pressure is the power and flow the speed?

Put simply, yes. Pressure is the pushing power or force exerted on the water. The greater the pressure the faster the flow.