SR-Elite RO/DI 1:1 Ratio Extremely Efficient

[StirCrazy]

Originally Posted by Myka

Thank you for finally answering some of my questions. So...what brand are these membranes? How are you achieve 1:1? This is an important question because membrane life expectancy could be compromised, and I don't find manufacturer claims to be sufficient. If you could please explain this, I would still be interested in a retrofit.

I use a flush kit on my current system, and I use it on every start up as well as flushing after every use. I doubt that standard home water pressure is good enough to flush the membrane very well, but I do it anyway.

I think there just using a normal membrain and by setting the auto flush unit to flush frequently during production it keeps the build up lower.

If you have enough water pressure to make RO water you have enough to flush

Steve

[Myka]

Originally Posted by StirCrazy

I think there just using a normal membrain and by setting the auto flush unit to flush frequently during production it keeps the build up lower.

If you have enough water pressure to make RO water you have enough to flush

Steve

Steve, when the valve is open and it bypasses the flow restrictor for flushing there is only 30 psi through the unit. I have a friend that is a pro ro guy and he told me that isn't enough psi to flush the membrane well enough to make a difference. He said flush kits really only work on high psi commercial systems. Maybe that's not true...I don't know.

I think you're right about the membrane. I flush my membrane a few times mid-use too, and always make sure that my storage barrel is almost empty so I make 50 gallons at a time since the membrane will last longer than frequent, short uses.

[StirCrazy]

Originally Posted by Myka

Steve, when the valve is open and it bypasses the flow restrictor for flushing there is only 30 psi through the unit.

you only have 30 PSI water pressure?

Steve

[Myka]

I have 65 psi when a 150 gpd flow restrictor is used. If flow is completely blocked there is a little under 70 psi. When water bypasses the flow restrictor through the 1/4" tubing the pressure gauge only reads around 30 psi. Less resistance, less pressure. Yours is probably similar.

[reefermadness]

It is normal for the system pressure to drop when you flush the membrane. You are releasing the back pressure on the system....its like opening a faucet....the pressure on the line drops.

[Myka]

Yah mahn. It will stay at 30 psi indefinitely though.

[reefermadness]

Turn the flush on....pressure drop...turn the flush off and pressure back up or no? Can you clarify?

[StirCrazy]

Originally Posted by Myka

I have 65 psi when a 150 gpd flow restrictor is used. If flow is completely blocked there is a little under 70 psi. When water bypasses the flow restrictor through the 1/4" tubing the pressure gauge only reads around 30 psi. Less resistance, less pressure. Yours is probably similar.

naa mine isnt like that but only because I use a pump to supply my water at 120 PSI. it still drops off a bit but only to about 90 PSI because the volume of the pump is good enough to keep the PSI up.

I do think your drop through a 1/4" line is a little large. befor my pump in my old house I would get about a 3 PSI drop, not 35 PSI, but I guess that could have to do in how you are supplying the water and where the PSI is measured.

Steve

[mw5655]

Sorry to Hijack this post but has anybody else been waiting on their 150gpd 1:1 unit from BWI? My order was placed May 18th still waiting. Just wondering if I'm the only one.

[sphelps]

Originally Posted by mw5655

Sorry to Hijack this post but has anybody else been waiting on their 150gpd 1:1 unit from BWI? My order was placed May 18th still waiting. Just wondering if I'm the only one.

Yeah I have to say the customer service is lacking from this guy, likely he's busy with spring work and BWI is a side business. I had to follow up with him to get my unit shipped and I'm confident I'd still be waiting if I didn't so contact him ASAP.

Also people should note these units do not apparently include an auto shut off so you'll either have to add one or manually turn the water supply on or off (a float switch won't shut it off). I see he's noted this in the thread now but the website is misleading as it states it's included. I managed to get a shut off added after I already received my unit but I'm still waiting for it, took over two weeks for him to ship it out after being promised next day and again I had to follow up to even get it out then.

Overall like the product, hate the service. Will not be a repeat customer. Look around there are plenty other 1:1 units available and even 2:1 (2 good, 1 waste) units available, not as cheap but at least they actually do include everything you need.