Mystery pipe stack

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Old 01-13-14, 07:33 AM
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Mystery pipe stack

I am replacing old galvanized pipe water lines with PEX. At the shower there are 2 capped pipes (approx 2 feet high) above the hot and cold water lines directly above the shower. Does anyone know why? Is this to have extra water for the shower (a reservoir)? Is it to help pressurize the water lines after the shower? This water line is a very long line from the hot water heater. Do I need these stacks with the new PEX? I have never seen this before. Thanks.
 
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Old 01-13-14, 07:51 AM
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Similar to this??



They are probably there to reduce water hammer. They aren't effective after they get waterlogged and have to be drained occasionally. If after you install the new lines you can install actual hammer arresters later if you experience an issue. Don't think a shower is normally a problem area. And I think the "give" inn PEX helps to minimize it as well.
 
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Old 01-13-14, 09:13 AM
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Old 01-13-14, 10:57 AM
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That's exactly what they are. Thanks for the info.
 
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