Pool Water Filtering Services

[kul]

A drain and fill will always be cheaper. RO was my preference and by my standards it worked out well for me. If I just need to make a small change, I’d do a drain and fill, but if the majority of water needs to be replaced I’d do RO again.

 

[Bperry]

The low pressure taps used under kitchen sinks have very low efficiency. Typically 8:1 waste:filtered ratio. That can be improved with a permeate pump attached to the unit and probably gets it up to 3:1.

For industrial applications, you use high pressure membranes with pressurizing pumps to boost efficiency and get to about a 15% waste water fraction. But those units operate well above 150psi. Some membranes have operating points at 250psi. Typically the higher the pressure on the membrane the more efficient the RO process is but then more complex plumbing is needed which drives up cost considerably.

That’s kinda my point. If you are trying to use RO to avoid wasting water, it turns out that RO is just an expensive way to waste even more water than a drain and refill.

 

[Newdude]

If you are trying to use RO to avoid wasting water, it turns out that RO is just an expensive way to waste even more water than a drain and refill.

As said above, ROs for pools lose 15% to 25% of the water. A full drain and refill loses 100% of the water.

Water can never be wasted, only relocated, but that doesn't make getting new water easy or cheap. Some are more conscious of 'doing their part' in dry areas than others.

Half the time I think I'd defiantly do as i pleased as long as golf courses, MegaLoMarts, etc, were blowing through bazillions of gallons a year. The other half of the time I'd think that I don't look at them in the mirror, and 2 wrongs don't make a right.

It's complicated.

 

[JoyfulNoise]

Guess what … it’s physically impossible to lose water from planet earth. It’s called the water CYCLE for a reason. You can dump it on the ground … I promise you, the molecules will find their way back to you …

 

[Newdude]

Its like beer. You don't buy it, you rent it.

 

[Bperry]

As said above, ROs for pools lose 15% to 25% of the water. A full drain and refill loses 100% of the water.

Water can never be wasted, only relocated, but that doesn't make getting new water easy or cheap. Some are more conscious of 'doing their part' in dry areas than others.

Half the time I think I'd defiantly do as i pleased as long as golf courses, MegaLoMarts, etc, were blowing through bazillions of gallons a year. The other half of the time I think that I don't look at them in the mirror, and 2 wrongs don't make a right. It's complicated.

Maybe I’m confused, the poster above referenced the advertised “uses 15% of the water” but actual was closer to 25%. I was assuming that means 100 gallons went in and only 25 came back out clean. If it’s the other way around then that changes things around a it.

 

[JoyfulNoise]

Maybe I’m confused, the poster above referenced the advertised “uses 15% of the water” but actual was closer to 25%. I was assuming that means 100 gallons went in and only 25 came back out clean. If it’s the other way around then that changes things around a it.

The other way around. The waste water stream is about 15-25% of the total processed volume.

 

[JoyfulNoise]

There are two major factors that affect RO performance - differential pressure across the membrane and TDS of the source water. The waste fraction decreases with increasing differential pressure asymptotically, that is, it levels off at a certain point such that no further increase in pressure reduces the amount of waste. The second major factor is TDS of the input source. High TDS input water decreases the efficiency of the membrane linearly. So while it may seem obvious, the “dirtier” the input water is, the more water will go to waste to produce a given amount of permeate. Unfortunately pool water has very high TDS, especially if it’s a salt water pool, and so most RO membranes will perform poorly.

 

[MobileR.O.guy]

I've been doing reverse osmosis on all my service accounts and its been game changing