Plumbers in Wimberley, Texas

What the unit is actually doing under the sink

A reverse osmosis system is a sequence, and knowing the order explains nearly all of its behaviour.

Sediment and carbon come first, and they are there to protect the membrane. The pre-filters take out grit and chlorine, both of which shorten a membrane's life. They are the cheap parts, they are the ones that need changing on schedule, and skipping them is what kills the expensive part.

The membrane does the work slowly. It produces a few gallons an hour, not a few gallons a minute, which is why there is a small storage tank under the cabinet. A tap that runs strong then fades is telling you about the tank, not the membrane.

Some water goes to drain, by design. Reverse osmosis sends a proportion of what it treats down the waste line to carry away what it removed. On hard water that ratio is worse, which is the honest argument for softening upstream rather than making the membrane fight the hardness.

The water that comes out is aggressive and flat. It has had the minerals taken out, so it tastes different and it is mildly corrosive. That is why the tap and tubing are specific to these systems, and why some households add a remineralising stage for taste.

The connections that cause the callouts

The unit itself rarely fails outright. The plumbing around it is another matter.

The drain connection is the weak point. The waste line usually joins the sink drain with a saddle clamp, and that joint is where we find slow weeping, a hole drilled oversize, or a connection made into the wrong side of the trap. It is also the source of the gurgling people complain about.

Air gap taps are noisier and fussier. An air gap faucet protects against back siphonage and makes an intermittent trickling sound, and it blocks with mineral scale on water like ours. It is not broken when it does that, it needs cleaning.

Tank pressure is a service item. The storage tank has an air charge behind a bladder, typically around seven pounds when empty. Lose that charge and the tap dribbles even with a healthy membrane, which is the single most common complaint we hear.

Fridge and ice maker lines tee off the same unit. That is usually fine, though a long run to a refrigerator slows recovery and gives the tubing more places to fail. Any tee under there should be reachable without emptying the cabinet.

Everything under a sink lives next to what is stored there. Cleaning bottles, buckets and boxes get pushed against tubing and fittings. Clear space around the unit is a genuine piece of leak prevention.

How a call plays out

Someone answers at any hour. Tell us whether the tap is slow or dead, whether the water tastes different, and when the pre-filters were last changed. If there is water in the cabinet, get what is stored under there out and put a towel down before we arrive.

Wimberley and western Hays County are on our daily route. We service what is there rather than selling a new system by default, and we will tell you when the real answer is treating the hardness upstream instead of asking a membrane to do it.