Where does the kitchen cold water pipe come from?

[Stan0228]

I am trying to find out where does my kitchen cold water pipe come from???

I've tested several different pipes for several hours and still have no clue where does my kitchen cold water pipe come from?
Is it possible that a 3/4" pipe has a branch pipe under the slab?

I enclosed the following photos -
* my house fixture layout (photo 1)
* water pipes behind my washer (photo #2)
* pipes behind my bathroom toilet/sink (photo #3).
I labeled all pipes with different numbers.

For the pipes behind washer, I found pipe #3 should be the pipe coming from the mainline
(because when I cut the pipe #3 and end cap the bottom,
there is no cold/hot water inside the whole house as well as the outside faucet in the backyard.)
By the way, pipe #1,2,3 are all 3/4" pipe.

Then I tested pipe #2 (after connect pipe #1 back) by cut off pipe #2 and put an end cap at the top.
Now there is still cold water coming out from ALL fixtures in the house including the outside faucet, but NO HOT water at all.
(Later I connected the pipe #2 back and there is hot water in the whole house.)
Does that mean this pipe #2 is connectin to the water heater??
But it doesn't seem right because the water heater is located before the washer and between the water meter and washer.

Now last pipe I tested is pipe #5 in the bathroom.
(Pipe #5,6 are 3/4" and #4,7,8 are all 1/2".)
I cut pipe #5 and put an end cap at the bottom.
Now there is NO COLD water coming out from sink/toilet/tub in BOTH bathrooms. However there is still cold water coming out from KITCHEN SINK and OUTSIDE FAUCET.
Where do the kitchen and outside faucet cold water pipes come from?

Can anyone help me if you know the possible water pipe layout in the house, especially for the water heater, kitchen and outside faucet? Thank you very much!

 

[Stan0228]

Pipes all 3/4" behind washer.

 

[Stan0228]

Pipes behind toilet. (Only #5,6 are 3/4". Rest are all 1/2")

 

[frodo]

from the information provided me, my best guess, is

 

[Stan0228]

Thank you so much for your help out here, but one question -

For the pipe (#1) going to water heater,
then from there to kitchen, then from kitchen to outside faucet,
is it ever possible that after I cut off and put an end cap on pipe #1 (pipe going to the water heater),
there can still be cold water coming out from kitchen and outside faucet??

(Because that was what happened when I put an end cap on pipe #1 so no water going to water heater, but what happened is the whole house still have cold water including kitchen and outside faucet, but no hot water at all in the house.)

Thank you. I really appreciate your time.

 

[frodo]

I am trying to find out where does my kitchen cold water pipe come from???

I've tested several different pipes for several hours and still have no clue where does my kitchen cold water pipe come from?
Is it possible that a 3/4" pipe has a branch pipe under the slab?

I enclosed the following photos -
* my house fixture layout (photo 1)
* water pipes behind my washer (photo #2)
* pipes behind my bathroom toilet/sink (photo #3).
what is behind the tub ?


I labeled all pipes with different numbers.

For the pipes behind washer, I found pipe #3 should be the pipe coming from the mainline
(because when I cut the pipe #3 and end cap the bottom,
there is no cold/hot water inside the whole house as well as the outside faucet in the backyard.)
By the way, pipe #1,2,3 are all 3/4" pipe.

what does #1 feed



Then I tested pipe #2 (after connect pipe #1 back) by cut off pipe #2 and put an end cap at the top.
Now there is still cold water coming out from ALL fixtures in the house including the outside faucet, but NO HOT water at all. what about the front hb ?
(Later I connected the pipe #2 back and there is hot water in the whole house.)
Does that mean this pipe #2 is connectin to the water heater??
But it doesn't seem right because the water heater is located before the washer and between the water meter and washer.

Now last pipe I tested is pipe #5 in the bathroom.
(Pipe #5,6 are 3/4" and #4,7,8 are all 1/2".)
I cut pipe #5 and put an end cap at the bottom.
Now there is NO COLD water coming out from sink/toilet/tub in BOTH bathrooms. However there is still cold water coming out from KITCHEN SINK and OUTSIDE FAUCET.
Where do the kitchen and outside faucet cold water pipes come from?

Can anyone help me if you know the possible water pipe layout in the house, especially for the water heater, kitchen and outside faucet? Thank you very much!

...................................


you need to cut behind the w/h and the tub

 

[Mr_David]

I am trying to find out where does my kitchen cold water pipe come from???

I've tested several different pipes for several hours and still have no clue where does my kitchen cold water pipe come from?
Is it possible that a 3/4" pipe has a branch pipe under the slab?


(because when I cut the pipe #3 and end cap the bottom,
there is no cold/hot water inside the whole house as well as the outside faucet in the backyard.)
By the way, pipe #1,2,3 are all 3/4" pipe.

Then I tested pipe #2 (after connect pipe #1 back) by cut off pipe #2 and put an end cap at the top.
!

is that a typo?? you said you put #1 back together, but you cut #3.
Going to presume you put #3 Back together.
back to the puzzle

 

[Mr_David]

Do you have an air compressor or a bottle of CO2.
Beats having to put each one back together to see what you lost
turn of main water
Cut #1
Blow air into #1 see which fixture have air.

How many loops at the kitchen???

In a nut shell
Cut # 3 loose all
Cut #2 loose Hot only
Cut #5 loose both bathrms but not kitchen/hose bib

#3 main feed
#2 to water heater#1 to kitchen/ rear hose bib
#5 from kitchen to middle Bathroom
#6 to far bathroom