wattsupdoc
Active Member
Yes, thats it! Auto shut off......or otherwise known as ......thingy
Elaborate Dog!
Elaborate Dog!
build your own rodi
- Thread starter sign guy
- Start date
dogstar
Active Member
Originally Posted by sign guy
Could you explain a little more
Ill try...One must first understand that water molecules are smaller than most other types of molecules....
Without any restriction on the waste line, it can not build up pressure inside the chamber that will force the smaller water molecules thru the mesh of the membrane. The mesh is sized just large enough for water molicules to pass thru under pressure. Thus leaveing the larger unwanted particulate molecules that will not fit thru the mesh outside the membrane to be carried away in the waste water.
Look at your own drawing, like its drawn, prefiltered water will freely flow into and out of the chamber....never forceing H2O thru the mesh....picture restriction on the waste line and you can then see how it can build pressure in the chamber that can now force the H2O thru...the rateing on the restrictor determines how much pressure it builds up in the chamber thus controlling the amout that is forced thru the membrane according to its rateing ( the rateing of a membrane is something I dont really understand, Im not saying its a industry gimmick but I do think about that because IMO, its all controld by the restrictor )
BTW, is that two ROs piggybacked together....how did you plumb those ??
Could you explain a little more
Ill try...One must first understand that water molecules are smaller than most other types of molecules....
Without any restriction on the waste line, it can not build up pressure inside the chamber that will force the smaller water molecules thru the mesh of the membrane. The mesh is sized just large enough for water molicules to pass thru under pressure. Thus leaveing the larger unwanted particulate molecules that will not fit thru the mesh outside the membrane to be carried away in the waste water.
Look at your own drawing, like its drawn, prefiltered water will freely flow into and out of the chamber....never forceing H2O thru the mesh....picture restriction on the waste line and you can then see how it can build pressure in the chamber that can now force the H2O thru...the rateing on the restrictor determines how much pressure it builds up in the chamber thus controlling the amout that is forced thru the membrane according to its rateing ( the rateing of a membrane is something I dont really understand, Im not saying its a industry gimmick but I do think about that because IMO, its all controld by the restrictor )
BTW, is that two ROs piggybacked together....how did you plumb those ??
sign guy
Active Member
Originally Posted by Dogstar
Without any restriction on the waste line, it can not build up pressure inside the chamber that will force the smaller water molecules thru the mesh of the membrane.
so how dose more incoming pressure not raise the gpd above the ratings?
Originally Posted by Dogstar
BTW, is that two ROs piggybacked together....how did you plumb those ??
the first ro is a 75 gpd membrane and its rejected water feeds the 35gpd membrane. the rejected water from the 35 is thrown on the lawn after the two water lines leave the pressure vessels they join back together by a T valve and enter the DI. I did this to cut down on my rejected water, but maintained high quality
Without any restriction on the waste line, it can not build up pressure inside the chamber that will force the smaller water molecules thru the mesh of the membrane.
so how dose more incoming pressure not raise the gpd above the ratings?
Originally Posted by Dogstar
BTW, is that two ROs piggybacked together....how did you plumb those ??
the first ro is a 75 gpd membrane and its rejected water feeds the 35gpd membrane. the rejected water from the 35 is thrown on the lawn after the two water lines leave the pressure vessels they join back together by a T valve and enter the DI. I did this to cut down on my rejected water, but maintained high quality
dogstar
Active Member
Originally Posted by sign guy
so how dose more incoming pressure not raise the gpd above the ratings?
Lets say you house plumbing is under 70 psi...if you kept the waste line closed off, that would put 70 psi on the membrane....the more you open the waste line, the less pressure will be on the membrane...the different size flow restrictors are like opening the waste line to different amounts, thus applying different pressures on the membrane...the amount of pressure on the membrane is determend by the size of the FR.
so how dose more incoming pressure not raise the gpd above the ratings?
Lets say you house plumbing is under 70 psi...if you kept the waste line closed off, that would put 70 psi on the membrane....the more you open the waste line, the less pressure will be on the membrane...the different size flow restrictors are like opening the waste line to different amounts, thus applying different pressures on the membrane...the amount of pressure on the membrane is determend by the size of the FR.
sign guy
Active Member
my unit was built around two things water quality and least amount of waist water possible. I have in order a 5 micron sediment filter a 1 micron sediment filter carbon 75 gpd ro membrane in witch the rejected water feeds a 35gpd ro membrane and they both feed back into a two stage DI. the DI's are the same but the water will travel through the older Di first then to a newer one. I run two sed filters because a 1 micron is so small it would clog up really fast so I put a more coman 5 micron before it
jerthunter
Active Member
I'm bumping this so I can find it easily again.
One quick question. When you purchased the cans and pressure vessel, did they come with the enclosures or did you need to find them else where?
One quick question. When you purchased the cans and pressure vessel, did they come with the enclosures or did you need to find them else where?
spiderwoman
Active Member
Impressive sign guy!!!
sign guy
Active Member
Originally Posted by Jerthunter
http:///forum/post/2746420
I'm bumping this so I can find it easily again.
One quick question. When you purchased the cans and pressure vessel, did they come with the enclosures or did you need to find them else where?
that depends on what your refering to as the enclosures? do you meen the white pvc looking pieces?
http:///forum/post/2746420
I'm bumping this so I can find it easily again.
One quick question. When you purchased the cans and pressure vessel, did they come with the enclosures or did you need to find them else where?
that depends on what your refering to as the enclosures? do you meen the white pvc looking pieces?
jerthunter
Active Member
Originally Posted by sign guy
http:///forum/post/2746912
that depends on what your refering to as the enclosures? do you meen the white pvc looking pieces?
I'm referring to the lids for the canisters. However from your picture it looks like they are part of the unit. The reason I asked is, my current ro unit has the canisters the
[hr]
right into an aluminum head piece that also holds the canisters.
http:///forum/post/2746912
that depends on what your refering to as the enclosures? do you meen the white pvc looking pieces?
I'm referring to the lids for the canisters. However from your picture it looks like they are part of the unit. The reason I asked is, my current ro unit has the canisters the
[hr]
right into an aluminum head piece that also holds the canisters.
chris17
Member
Where were you oh about 2 months ago when I bought my rodi system?!?
jk lol I would have much rather built my own now that I have read thru this thread....but now I have something to do for my 2 week shutdown around Christmas!! ( can't beat getting paid to do nothing....
) lol add to my rodi unit of coarse lol
sign guy
Active Member
Originally Posted by chris17
http:///forum/post/2747420
Where were you oh about 2 months ago when I bought my rodi system?!?
jk lol I would have much rather built my own now that I have read thru this thread....but now I have something to do for my 2 week shutdown around Christmas!! ( can't beat getting paid to do nothing....
) lol add to my rodi unit of coarse lol
thats the great thing about these units once you build your own and understand how there made you can add or build up any system Im looking at a uv to add to mine right now
http:///forum/post/2747420
Where were you oh about 2 months ago when I bought my rodi system?!?
thats the great thing about these units once you build your own and understand how there made you can add or build up any system Im looking at a uv to add to mine right now