[MJH]

i am currently installing a 4040 ro system in my new van and am wondering what order the pump and di canister should go, i believe it is pump then di but just wanted to confirm for sure, i have looked through the other posts and can not pin-point this!!
Sorry in advance if this is a daft question. :

[24-7 S C Services]

Hi Matt

Di is after the pump mate, this eliminates any contamination it may pick up from the pump.

Hope that helps

Andrew

[MJH]

Thanks for that Andrew i thought it was the case!! i am sure i read on another post someone had done it differently.
All the best matt

[Davew]

Done mine before pump seems ok. Someone said they should not be pressurised, tds reading zero.

[MJH]

i thought i had seen it somewhere, just wasn't sure which is best, di after pump seems logical!

[Davew]

Jim123 where are you?

[JM123]

Most people have the di after the pump however we set our systems up so the di is before the pump.. This has a few advantages.

1 - when running 2 pumps there is no interference, that is each pump and reel line is completely independant of the other.
2 - it eliminates the risk of creep stress fracturing of the di vessel (creep stress is caused by stress on a body - in this case the vessel - over a period of time.

[JM123]

dave I'm here mate - I'm never far away

[Davew]

Blimey that was quick!

[JM123]

I know

[edd]

mine is di into the tank then the pump then brush still 000ppm one year later all the water in the tank is pure