RODI. How many GPD?

[willember]

If I only need 10 Gallons a day, why would I need a 110GPD unit?

Just wondering if there is any benifit to going higher GPD (besides getting more water each day.

-WB

[slipknottin]

just the gpd is different. The only real issue is in some type of emergency where you need a large amount of RO water quickly. Though I suppose you could make a quick trip to the local grocery store and buy a couple gallons if you need them.

[willember]

Thanks for the quick reply.

[skuykend]

You should look at the rejection rate of the membrane. Dow membranes that produce 75G per day reject 98% while the 100G units only reject 90% leaving more stuff for the DI unit to absorb or if no DI just goes into your tank. i.e. if your tap water only has 100ppm the you get 2ppm with the 75G unit and 10ppm with the 100G.

Steve

[moonpod]

Basically it also happens to be how patient you are. Do you want the water "on demand"? Will you keep resevoirs of water around? etc...

The standard 75 gpd membranes and lower outperform the standard 100 gpd membranes. Depending on your starting TDS it may or may not matter.

[willember]

http://cgi.ebay.com/AQUARIUM-2-110GPD-RO-DI-REVERSE-OSMOSIS-FILTER_W0QQitemZ7705366023QQcategoryZ20756QQtcZphotoQQcmdZViewItem

this is the one I am looking at currently. Is it OK?

Can I put a garden hose timer in front of the unit and have it go directly into my autotopoff reservoir, or would I need some sort of float switch?

[skuykend]

Looks fine, but you'll need a float valve to keep from overflowing you're resevoir....


Steve

[dougchambers]

Take a look at www.airwaterice.com also. Walter has some good products and is very helpful with questions.

-Doug