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Ugh. 1. You'll need to drain, clean, and sanitize that holding tank. 2. Because that system set unused for 18 months, you'll want to strip out the system membranes, and toss them. Before you do, take a picture of the label on the membrane and vendors like us can use that info to provide you...

Fluid O Tech makes good pumps. So 1.8 GPM allows for 0.8 gpm permeate a 1.0 gpm concentrate. That's not enough concentrate with a 4" membrane. You adjust the outlet pressure of the pump. You can run an HF5 (80 psi) membrane at much higher pressures. Running it at pressures higher than 80...

Your pump is putting out 110 psi. Nothing unusual there. A 2540 membrane would typically put out between 650 and 1000 gpd, or 0.45 to 0.7 gpm. Your permeate gauge reads about 0.86 gpm, or 1200 gpd. In other words it is reading too high. Either your concentrate flow gauge is not working, or...

Membranes are spec'd by the manufacturer at a certain pressure. This is the pressure at which they tested the membrane during design. So at 77F and x psi, the membrane will produce y gallons. So when users ask "How can I get faster production from my RO system?" one common answer is to add...

Looks like a 2540 membrane? What pressure shows on the pump pressure gauge when the system is running?

How about a 4021 membrane spec'ed at 80 psi? https://www.buckeyehydro.com/axeon-hf5-4021-ro-membrane-1-000-gpd/

Yes indeed. I suspect it is not long for this world.

I think you want the NXT2 timers.

Maintenance of Fleck valves... Ugh.

Never, never, ever run a procon pump dry. You'll destroy it in short order. Pressurized feed to the pump is ideal. Russ

Yep - some of the things that go into recommending a certain capacity RO (in gpd) include: *minimum winter water temperature *capacity factor (essentially how many hours of the available time do we want the RO to have to run to keep up with demand), and *size of the storage tank. The "Gallons...

I agree with Waterboy - "Recovery" and "Rejection" are two critical metrics when operating an RO system, and they are understood by very few car wash managers. A little jargon to help understand this: Feedwater: The water delivered to your RO system - after any pretreatment like a carbon tank...

I have a list somewhere around here

Be advised that as of the end of 2024, Fleck (historically, the most common brand of water treatment equipment in carwashes that I am aware of) discontinued production of about 2400 parts. The very long list includes some replacement parts for more than a dozen water treatment valves. Some of...

As of about 3 weeks ago, Fleck sent out a message to their distributors identifying a large number of parts they will no longer be making. I can get more info/specifics on this if people are interested. Russ

We've had good luck with Axeon membranes over the years. We stock their 4040's @ 225 psi, 150 psi, 100 psi, and 80 psi. We also have the full lineup of Filmtec membranes.

If you get up on a ladder and look at that DM2 inline TDS meter on your RO, here's what you'll see. This meter has cables running to two separate TDS probes. Typically, one is mounted on the RO feedwater (which should be after your carbon tank and softener), and the other is mounted on the...

Rather than add a DI tank to your set up, I'd concentrate on tweaking your RO system so that it produces permeate with a lower TDS. I don't like where this is mounted because you need to be keeping tabs on what the gauges tell you, and what the DM2 inline TDS meter (the small white box at the...

Maybe this will help. A twin tank alternating softener is installed so that the softener can produce softened water 24/7/365 without interruption. Components of the softener and carbon tank valve need periodic maintenance.