RO/DI unit leaking waste water??

[Blown 346]

I have a 50 GPD RO unit and after having the float and automatic shutoff valve kit hooked up, and the line in my main water line installed I have a problem with the waste line leaking water constantly.
For the first 3 months it was fine, I would turn the valve on so I could make water and turn it off after I was done.
Now for the last 3 weeks or so I noticed the waste water line is constantly dripping like 3 to 4 drops per second with the valve on the main water line shut off.
I dosconnected everything and re did it, and found nothing to cause this. What could be causing this drip?

The kit I have is a Pure flow 2 Float and automatic shutoff valve kit.

[Im14abeer]

Plumb a pressure guage in the supply line, if it reads pressure with the valve off, the valve is not holding. You could skip the guage and just disconnect the supply line and see if it's leaking. If it is, the valve is probably a globe valve, shut the water off ahead of that valve, open it and then remove the bonnet. The bonnet is the hexed part on the body of the valve, the larger one under the nut on the stem. Now remove the stem and take it to Nathan's hardware and get a new washer. Or you could just stop at home depot and get a washer assortment, they aren't expensive. If the brass screw is really corroded replace that too, they usually come with the washer asst. If you're on Rockford city water you did good by getting an RO, the water here sux. I'm sorry if I misunderstand you, it's hard to talk about plumbing without being familar with the product in question. I would think your float valve works on a similar principal regarding shut off, you would know if it wasn't holding because the level in your storage tank would continue to rise (very slowly, maybe slower than evaporation.) There could be something keeping it from seating. I'd be less inclined to believe this though, because the water going through the float valve is well filtered and there shouldn't be anything to get caught in that assembly. Besides that, the residual pressure would eventually be bled off. One last thing, if the supply valve is not a globe valve, it is a gate valve or ball valve, if that is the case and the cause, it will have to be replaced or lived with.

[Blown 346]

It was the valve saddle going into the feed line, and yes the supply line was also dripping as well. Thanks for your help, now I can stop wasting water and lower my bill. lol

[Im14abeer]

One last thing, if the supply valve is not a globe valve, it is a gate valve or ball valve, if that is the case and the cause, it will have to be replaced or lived with.

Or a saddle valve (needle valve) the most troublesome valve of all!
That may continue to be a problem if you turn it on and shut it off alot.
I've seen these leak the first year after being installed on a furnace humidifier and only turned on and off twice. A ball valve is in order here. Really easy if you have copper plumbing. And not very expensive if this is a semi-long term setup. Which most marines are (not mine though!) About $15 and 40 min not including a torch, solder, flux and a tubing cutter. And I'd be happy to lend you those if you don't have them.

Wasting water is not cool. Look at how slow it comes out of your supply line after the filter and how much water that is in a day!

If you decide to install a better valve and need any of those things let me know.

>Jamie