Backflushing a shower valve.

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Vtxrider

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I have a symmons shower valve I'd like to back flush. I believe I got something that might be caught in elbow going into it. Long story about hot water temp. I don't have a drain to open for the HW drain into. Normally I'll use buckets. My washer sits a floor below the shower and uses the same line. Hot and cold lines are separate valves for the washer. I thought about connecting a hose to the hot line for the washer and run it out the window. Would work?
 

Vtxrider

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The water heater has a drain valve at the bottom. It has a garden hose thread.
I understand that. Used it many times. I mentioned I don't have a drain or a slop sink to drain in to. Like do something easy then emptying 5 gallon pails.
 

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I understand that. Used it many times. I mentioned I don't have a drain or a slop sink to drain in to. Like do something easy then emptying 5 gallon pails.
Out the window works great normally.
 

Vtxrider

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Out the window works great normally.
If I connect a hose to the drain, would the cold water have a enough pressure to push it out a cellar window that is about 6 ft off the floor? The tank is about 6ft from the window. I'm guessing it would because it pushes it around the house. Is that right?
 

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Figure about 1/2 psi per foot. So 10 psi about 20 ft. City water is normally at least 40 psi.

Coincidentally, I have been pushing water out of a window this week with my little utility pump during my water treatment cleaning operations. That pump produces 10 psi deadhead. My rise was maybe 15 ft, so the flow rate was not high.
 
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