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Old 10-30-2011, 09:00 AM   #1
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Shutting of main- affect on boiler/water heater


Hey there,

I'm trying to replace some old galvanized piping that still remain in a house i bought. Most has been replaced already with copper or PVC, but some copper is still connected to galvanized lines and the union is corroding. The worst is a joint just before my water heater.

My question is, when i shut off my water main, are there any additional steps i need to take with my boiler and water heater to prevent any damage from the loss of water? The boiler has a refill tank so the lines dont need to be refilled manually. Thanks for any suggestions and tips

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Old 10-30-2011, 09:15 AM   #2
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Shutting of main- affect on boiler/water heater


Can't help with the boiler but water heater inlets and outlets are usually on top so turning off the water supply will not drain the tank. But I would still turn the thermostat all the way down or just turn off the elec or gas while doing the work.

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Originally Posted by pisbouts View Post
Hey there,

I'm trying to replace some old galvanized piping that still remain in a house i bought. Most has been replaced already with copper or PVC, but some copper is still connected to galvanized lines and the union is corroding. The worst is a joint just before my water heater.

My question is, when i shut off my water main, are there any additional steps i need to take with my boiler and water heater to prevent any damage from the loss of water? The boiler has a refill tank so the lines dont need to be refilled manually. Thanks for any suggestions and tips

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