[mufcglen]

I'm looking at getting a 4040 ro to start filling my van tank as I don't want a holding tank at home and I've just bought a tap pressure gauge and it says my tap pressure is 60psi and my tds is 76ppm.
Is this a good pressure to get decent production?

[Spruce]

I'm looking at getting a 4040 ro to start filling my van tank as I don't want a holding tank at home and I've just bought a tap pressure gauge and it says my tap pressure is 60psi and my tds is 76ppm.
Is this a good pressure to get decent production?

Yes, but you also need a good flow at the tap as well. So you need to measure the amount of water in liters you get a minute. You need a minimum of 9 lpm.

At 60 psi I would also suggest an HF5 membrane. They are more expensive than the HF4 but 60 psi is more within their operating window.
Please also buy a good USA made membrane such as Axeon. Please stay away from Chinese manufactured ones. Yes, they are cheaper but will end up costing you more in the end.

Are you on a water meter?
.

[mufcglen]

Thanks pal  I've checked it and it's doing about 6 litres a minute.
Is that way too low for a hf5?

[mufcglen]

Not on a water meter too

[Spruce]

Thanks pal  I've checked it and it's doing about 6 litres a minute.
Is that way too low for a hf5?

You need to find out why it's so low. How many liters a minute do you get from the bath cold tap?

It could be that your tap takeoff is from something like this

http://www.screwfix.com/p/self-cutting-tap-15mm-x-/21250?kpid=21250&gclid=EAIaIQobChMIp5rHkdeY1gIV6LftCh3IrAX6EAQYAyABEgImLvD_BwE&gclsrc=aw.ds&dclid=CNfs8JTXmNYCFZeLUQod8hwG7A

Unfortunately these brackets dont punch a very big hole so will reduce water flow.

Tap takeoff should be done with 15mm compression fittings for best flow.

http://www.ebay.co.uk/itm/Compression-15mm-Chrome-Plated-on-Brass-Copper-Pipe-Equal-Tee-CP-Fitting-/161229331007?var=&hash=item258a045a3f:m:m9Ay-JyOVX1Y6BgoeoTh6cg

[mufcglen]

Yep I have a tap cutting takeoff I fitted at the mains a few years ago pal, I've just done a test on my kitchen and bathroom tap and its twice as fast nearly 10-11 litres a minute!!
Think I'm gonna have to get stepdad round who's a plumber and proper solder me some 15mm copper fittings and pipework in lol
Going off 10lpm,60psi pressure and 76ppm what could I expect from an hf5 4040 ro with no booster pump an hour production?

[Spruce]

Yep I have a tap cutting takeoff I fitted at the mains a few years ago pal, I've just done a test on my kitchen and bathroom tap and its twice as fast nearly 10-11 litres a minute!!
Think I'm gonna have to get stepdad round who's a plumber and proper solder me some 15mm copper fittings and pipework in lol
Going off 10lpm,60psi pressure and 76ppm what could I expect from an hf5 4040 ro with no booster pump an hour production?

We have 50 psi and 13lpm of water. An HF5 does us 2lpm of pure with 2lpm of waste with no booster. Our tap water tds fluctuates between 79 and 149 ppm.

10 lpm is good enough.  I think you will struggle with 6lpm as you have very little in reserve to keep the pressure up.

[mufcglen]

changed my pipework at the mains today, took the tap kit out that you tap into a tiny hole and replaced with 15mm up to the tap and its crazy fast now, 13 lpm im getting from it, just filled the van tank up took 20mins do about 3-400 litres!!
need to get a hf5 now along with the 3 20" filters and housing, any recommended places to try?
seen gaps water at moment?

[mufcglen]

a question about the filters too, im looking at getting 20" over 10", i noticed some guys use 2 filters and some use 3?
am i fine using 2 or should i invest in 3?

[Don Kee]

Daquas good as well

I use two prefilters, and sediment filter and a carbon block (gets rid of chlorine etc...)

The only real difference between 20" and 10" is how long you're filters will last. The 20" obviously don't get changed as often as they can filter more due to size

Mine are 10" but wish I'd gone for 20's to be honest