New to RO/DI and would appreciate some guidance

[MaxPowered]

Hey Guys,

So I have finally opted to go the RO/DI route (this hobby never seems to get cheaper).

Anyways, I bought the unit used and would appreciate some help from you guys to help me find out if the water will be safe enough to go in the tank. (I have always trusted prime despite the algae).

I got a 100gpd aqua safe unit, with a battery powered TDS meter, and pressure gauge.

Help with the following questions would be great.

1. Where does the pressure gauge go to test the amount of pressure? It's one the looks to be put in where one of the tube goes, but there is just so many.

2. What pressure is acceptable?

3. It looks like the TDS meter has been calibrated before, but the batteries are dead, so will it need to recalibrated? Also what is the accpetable ppm rating?

4. How will I know if the cartridges/membranes need replaced.


I really hope one of you guys can help me out.

Thanks in advance!