Knox_Legend (RO/DI install)

[Engloid]

Saw your post on the "other" forum...but I'm not going to make an ID to post up.

As for figuring out which of the two hot water heater pipes are the outlet... Just turn on the hot water in the house, and the pipe that remains cold is the inlet.

Personally, I don't much care for the clamp on tap things, but you can use one if you want. I prefer to just cut the line and solder in the right fittings. If you are uncomfortable with that, and aren't too far out, just get the parts and I'll come by and do it. ..and no big worries...I've done a ton of copper work and there won't be any complications.

 

[Knox_Legend]

I need to check this forum more often. The odd thing is I have felt both of the pipes on the top of the hot water heater and both appear to be warm. I figured one would be cold and the other hot. Could they both be warm just from residual heat from the water heater? I will turn on the hot water full blast and see which one becomes more hot. I'm not a big fan of the clamp fitting either since I am renting the house and would rather have somethingthat I can just permanantley just solder back in like a plug as oppsed to a hole in the line. My only problem with the garage is that there is no good place for the drain I would have to run the house out of the garage and outside.

The other option is under the master bathroom sink and while that is the easiest plce to hook it up it also seems like a big pain in the *** crawling under the sink and filling jugs of water in my bathroom. Hmmmmm?

 

[Engloid]

If you keep running the hot water for a little while, you will find that one will get colder (inlet) and the other will get hotter (outlet).

The garage might be your best bet. A drain wouldn't be a big problem if you can just run the plastic poly tubing outside. If you did put it under the sink, all you'd have to do is get a poly line long enough to uncoil and put into your buckets when you need it.

Where there's a will, there's a way. :bigsmile:

 

[Knox_Legend]

If I go with the garage route which I would like to what fitting would I be looking for to splice into the water line?

 

[Engloid]

Most likely, you have 3/4" copper tubing...in which case you would first need a tee:
Tee, 3/4x3/4x1/2 In - Copper Fittings - Fittings - Plumbing : Grainger Industrial Supply
This gets you down to 1/2" pipe going towards your RO unit.


I'd Highly reccomend putting a valve in at this point:
Ball Valve, 2 PC, 1/2 In Solder, Brass - Ball Valves - Valves - Plumbing : Grainger Industrial Supply


Then,
Adapter, CxFNPT, Wrot Copper, 3/4x1/2 In - Copper Fittings - Fittings - Plumbing : Grainger Industrial Supply
This fitting (if I got the sizes right), should slip into the tee, and get you to where you are ready for something that is 1/2" male pipe thread.

From here, the parts can go to plastic tube/threaded fittings. The parts I'm finding online are expensive, and can probably be bought cheaper at lowes. All the stuff you need can be bought there.