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TxBuilder 04-07-2006 07:50 PM

Will tapping into hot water heatr ....
I need to tap into the line going into the hot water heater. My refrig does not have a water outlet and the only accessiable plumbing is on the other side of the wall, which goes into the hot water heater.

Will tapping into that line cause any problems with pressure? Too much pressure for the refrig water line or a decrease in pressure in the hot water throughout the house?

Square Eye 04-07-2006 11:34 PM

The fridge doesn't have enough flow to make a difference either way. The pressure in the system in the middle of the night (I've been told that's when pressures are highest) is the same throughout the house. Main line or ice maker lines, no difference.

I noticed that you said you are going to tap the cold water line. My understanding is that water from your hot water heater isn't fit to drink. I always go to the cold water line when I run my refrigerator line.

manhattan42 04-08-2006 08:21 AM

The water in your heater is potable and perfectly fine to drink.

If you tap into the cold line that supplies the water heater be sure to do so upstream of the expansion tank on their line if there is one, otherwise backpressure from the heater can force hot rather than cold water into the refrigerator line.

Your local plumbing code may require a backflow preventer or an expansion tank to be installed downstream of your tap depending on the type of heater and specific circumstances.

Do not use a 'saddle valve' to make the water line connection.

No longer allowed by code.

TxBuilder 04-08-2006 07:21 PM

Well got it all installed today. Turned out great. First I used a T connector then used an on/off valve to fit the water line to. Tested and worked flawless. Lots of thread lock tape and no leaks either.

I see the previous owner used a saddle valve on the backyard water valve and now it leaks.

PaPaDan 04-10-2006 04:07 PM

I've got one 3/4" pipe coming into my house. There is a tee in it at the water heater to fill it and then goes on to the rest of the faucets in 1/2". It was like that in galvanized when I bought the house in 77 and in 83 I replaced every bit of it with CPVC. Even upt the water heater to a 50 gallon in 96 because of the bubbly tub I installed for my wife. Have never had a problem. Never had water outlet in my fridge, but have always had ice makers.

cabinetsetc 04-14-2006 06:36 PM

Now you know. The reason why saddle valves are no longer code is because after a time they usually leak. While you have your plumbing tools out, I'd replace it.

woodworkingmenace 04-29-2006 08:46 AM

Hmmm thats funny, my ice maker instructions were to tap into the hot water side of the tank, so that the ice would be "pure" and "clear" of impurities...

Oh yes, I did use a "saddle valve" an its held for over ten years now...
But, silly me, I didnt "tap" into the hot water side, just the cold water side because I didnt believe that notion about clear ice... in fact, I tapped into the second water filter, I have in line, (after the filter of course), and I still dont have clear, maybe I should have gone with the notion of hot water in my system, eh?

When all else fails, THEN read the instructions...and when you dont believe them, well, all else may still fail... :)


TxBuilder 05-04-2006 10:30 PM

Tapping into the hot water side makes sense but I have water in the door so it would come out hot I assume unless it stores and cools the water which off hand I don't think it does.

woodworkingmenace 05-05-2006 12:18 PM

Actually, as it passes through the piping in the freezer unit, it cools it that way. And it is stored for awhile, but, not a huge amount on the older ones.
I dont know about the newer ones and what capacity of holding they have...have to refer to your owners manual.

Just my two cents for what its worth and a wee bit extra for the collection plate...


Square Eye 05-05-2006 12:30 PM

The only storage mine has is about 20' of tubing curled up in the back of the fridge box. As the water comes out it gets up to room temperature after the first glass is filled. My fridge was bought in 2001.

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