two ro pressure tanks?

[pws]

I got a pressure tank on my ro/di unit from filterdirect. I love this and was wondering if you could add another tank to it and work the same way just have 2 tanks connected to it to be able to fill a 5gal bucket without waiting? Please let me know what you think. Thanks

[69vette]

Yes you can, I have 2 tanks hooked together with a tee.

[manderx]

sure. just put a T in and add it right in.

edit: bah, beat me by 5 seconds...

[pws]

So these use 1/4" tubing? Also does anyone know if home depot or lowes or any other major chain have the pressure tanks. I might end up ordering a 14g one or a 5g one.

[AZDesertRat]

I have two on mine. I woul like to get a 10G bladder tank but they are pretty expensive compared to the small ones.

[jdieck]

If you install two tanks and you will have independent water drained from each, I would recommend that after the Tee you install a check valve in between the Tee and each tank. This will prevent the water from one tank going to the other as it is being withrawn unless you want this to happen.

[69vette]

No, it'll draw water from both simultaneously. There's no reason to use check valves.

[jdieck]

Good.
I was wondering as one tank could be used for your aquarium with RO/DI water and the other for drinking with only RO water so just in case as I did not know what you intended.

[pws]

Ok. Sounds like I am gonna put at least 2 on mine. Anyone know if any stores carry these so I don't have to order online or? I called homedepot but they say they don't have any tanks alone just as a whole setup.

[AZDesertRat]

Contact www.buckeyefieldsupply.com . He could probably have one to you in a day or two since he is close by. Your other option would be a plumbing supply warehouse or maybe WW Graingers but they would probably both be much more expensive.

[gotdesl]

I have seen the tanks at Lowe's as a standalone product. If I remember correctly, they are with the well pumps.

[pws]

The ones at lowe's are rated at like 28 psi when the ones we need should be at 5-7 psi

[jdieck]

Originally posted by pws
The ones at lowe's are rated at like 28 psi when the ones we need should be at 5-7 psi

Wouldn't the tanks at one point will receive the inlet pipe pressure of around 45 to 60 psi? I understand they shall be rated for up to 125 psi so they can be used in pumped systems. Am I right?

[69vette]

Originally posted by pws
The ones at lowe's are rated at like 28 psi when the ones we need should be at 5-7 psi

This is the initial air charge pressure.

[jdieck]

Originally posted by 69vette
This is the initial air charge pressure.

Thanks, So this is for bladder tanks and it is not the tank's rated working pressure?

[69vette]

Correct. This is the air pressure in the tank when the bladder is empty. The tanks rated pressure should be around 125 psi.

[pws]

Pre-charged to 38 psi. Is the 20gal tank there. So these would not work right as the pre-charged ro ones are at 5-7psi?

[jdieck]

Thanks!

[AZDesertRat]

You can pre charge a tank to whatever you want. They have a schrader valve on the side or top, just bleed it off and check it with a tire gauge.

[pws]

So I could get a 20gal tank that has a bladder at 38psi and then let the psi out until it hits 7 psi? Would that allow all the water to empty from the tank? I believe it would allow it to store more than the rated 20gal too right? Please let me know as I wanna order one tomorrow or pick one up.

[jdieck]

BTW has anyone had any trouble storing RO/DI water in metal tanks? I think it will be OK to use a bladder tank as the bladder is rubber but what about just air pressure chamber galvanized tanks?

[69vette]

I wouldn't suggest using anything but a bladder tank. I think you'll have problems with corrosion when storing RO water in a metal container.