[tlwcs]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

[nathankaye]

Compared to the pure water going through 3 membranes? 

Theres very little you can do with these to change the production of pure. If you have low tap pressure than a booster would be beneficial.
Other than that, its the big boys 4040 etc.

[Spruce]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

It saves a bit of water and is cheaper to setup. The third membrane gets hammered IMHO and will be the first to fail.

The r/o I first had was setup so each membrane was fed directly from the pipe coming from the prefilters. Each waste was joined or linked together with the waste valve (restrictor in my case) after that. The waste then went to the drain.
All the pure outlets where joined together before di.

To do this you will probably have to order some more 1/4" tubing and a number of John Guest 1/4" push in T pieces. I think I needed 6, 2 for the inlets, 2 for joining the waste a 2 for joining the pures together.

[tlwcs]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

It saves a bit of water and is cheaper to setup. The third membrane gets hammered IMHO and will be the first to fail.

The r/o I first had was setup so each membrane was fed directly from the pipe coming from the prefilters. Each waste was joined or linked together with the waste valve (restrictor in my case) after that. The waste then went to the drain.
All the pure outlets where joined together before di.

To do this you will probably have to order some more 1/4" tubing and a number of John Guest 1/4" push in T pieces. I think I needed 6, 2 for the inlets, 2 for joining the waste a 2 for joining the pures together.

Thanks spuce

[dd]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

I have a 300gpd system - 3 x 100gpd membranes set up the same way. It works well for me.

If you are satisfied with the performance of your system, leave it as it is.

[nathankaye]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

It saves a bit of water and is cheaper to setup. The third membrane gets hammered IMHO and will be the first to fail.

The r/o I first had was setup so each membrane was fed directly from the pipe coming from the prefilters. Each waste was joined or linked together with the waste valve (restrictor in my case) after that. The waste then went to the drain.
All the pure outlets where joined together before di.

To do this you will probably have to order some more 1/4" tubing and a number of John Guest 1/4" push in T pieces. I think I needed 6, 2 for the inlets, 2 for joining the waste a 2 for joining the pures together.

Would that directly effect the pressure going into the membranes or would it virtually be the same?

[Spruce]

Hi,
Just about to replace my 3 membranes. They are set up so the waste from the first feeds the second and then that waste feeds the third
Is that the most efficient way? I’m sure I’ve seem on here a different set up, but can’t find it with a search
Many thanks
Tony

It saves a bit of water and is cheaper to setup. The third membrane gets hammered IMHO and will be the first to fail.

The r/o I first had was setup so each membrane was fed directly from the pipe coming from the prefilters. Each waste was joined or linked together with the waste valve (restrictor in my case) after that. The waste then went to the drain.
All the pure outlets where joined together before di.

To do this you will probably have to order some more 1/4" tubing and a number of John Guest 1/4" push in T pieces. I think I needed 6, 2 for the inlets, 2 for joining the waste a 2 for joining the pures together.

Would that directly effect the pressure going into the membranes or would it virtually be the same?

Good question.  I wouldn't have thought there would be much difference. If there is I expect it would be minimal.

There is a third way to connect an r/o up and one of the local lads received his this way. The first two membranes have feeds from the prefilters but the third has the joined wastes from the first 2 membranes feed into the third.