[john63.]

How long to fill a 350 lt tank with 450 Gpd checked everything taking all day to fill

[Clever Forum Name]

My 450GPD this time of year takes around 9-10 hours. (400L holding tank)

No booster pump however i have 70-90 psi mains pressure.

475PPM - down to 6PPM then through twin DI's

[john63.]

Taking about 16 hours everything is new tap pressure ok aswell

[Clever Forum Name]

Flushed it properly ?

Is it just the feed from the RO going into the tank?

Any idea on pressure ?

[john63.]

Through ro then di into tank

[Clever Forum Name]

Do you know the pressure though?

Have you disconnected the RO from the Di to measure LPM ?

Flushed ?

[john63.]

Don't know pressure what's lpm

[Clever Forum Name]

Don't know pressure what's lpm

Disconnect the RO producing tube and time how long it takes to make one liter LPM (liters Per Minute) That the pure feed going to DI

Pressure and cold will have a massive effect on it.

[Clever Forum Name]

everything is new You have removed plastic film from filters and flushed for a good 30mins to an hour?

[john63.]

Yeah done that so it can be normal to take 15 to 20 hours

[Clever Forum Name]

I would say no as it's taking nearly twice as long as mine.

I would look into water pressure and look at LPM before DI

[john63.]

Does it have to go through di

[Clever Forum Name]

Does it have to go through di

Depends on what you are producing at i guess. I produce at 6PPM and still use DI (we get free resin though) I would hazard a guess at pressure is lower than mine.