RO/DI questions

So I'm moving some tanks around an have grown tired of refilling my sump by hand. I've got my 5 stage RO/DI setup in my finished basement for making up new water. I want to keep the system where it is and tye into it. Then run it up stairs to a level loc float in my sump. Question is will it work due to the head. As most RO/DI's don't have much discharge pressure. I think they sell booster pumps for them but I thought that was on the intake of the RO/DI unit not the discharge. I'm currently loosing about 3g of water every 5 days. The tank that's going upstairs is 30g larger than what there and will have MH lights and no glass tops. So I'm expecting quite abit more evap.

Matt:-/

 

Never plumb a RO/DI directly to your sump or display, always use a top off container of some sort so you limit the amount of fresh water that could possibly flood the system in case of a float or ATO failure.
That being said, I would either plumb it to a smaller tank or container close to the sump then top off from there or to a storage container in the basement and use a small peristaltic pump or aquarium pump to feed it up to the tank.

If you have 50+/- psi at your RO/DI, the additional 8-10 feet of head (3.5 to 4.3 psi) will make little difference to the RO membrane.

 

With the level loc an timer there's virtually no way to flood the system with fresh water. I've got more than 50 psi at the intake of the system. So should I just run the lines up and see what happens? I could add a separete contailer and have the float control a contactor to start a pump. But I'm a big fan of the KISS method and already have tons of electricity consuming stuff.

Matt

 

Talk to every RO manufacturer and ATO manufacturer, if you find one that recommends hooking directly to a sump I wil be very surprised and would have little faith in them.

I use a $240 UPLC II from Spectrapure with air sensor, back up float and a LiterMeter peristaltic pump that can be adjusted so it takes all day long milliliters at a time to fill if I choose and I sure would not try it.

Limit the amount of water you can send to the sump for safety.

 

OK, so what if I just plumb it to the sump and put a manual valve so don't have to carry the water an make a mess with buckets. This still doesn't answer my original question of head pressure.

Matt

 

I answered your question on the additional head, as long as you have 45-50+ psi at the membrane the additional 3 to 4 psi will not harm the membrane. When you start getting down to 40 psi membranes struggle.

 

AZ I think his question was not about the back pressure on the membrane, but would it be able to get the water from the basement to the upstairs portion of the house without adding a booster pump.

 

I answered his question, the additional 3 or 4 psi on the discharge is insignificant as long as he has suffuicinet pressure to begin with.