Expansion tanks

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Old 09-21-06, 07:09 PM
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Expansion tanks

I took out our old Extrol Model 30 expansion tank because it developed a leak. Lowe's carries a thermal expansion tank that seems to be made for water heaters. My question is whether I can use the Lowe's tank on my heating system. To me, the tank is built the same and works the same way (has a maximum psi of 150, whereas my Extrol max was 100 psi). Is this okay? What else should I be concerned about?

Thanks for any help you can give.

Terry
 
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Old 09-21-06, 07:23 PM
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Expansion tank

Do not use this type of tank. The rubber in the bladder will not withstand the heat of a boiler. Any plumbing supply house should have the type tank you need.
 
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Old 09-21-06, 07:49 PM
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Originally Posted by Grady
Do not use this type of tank. The rubber in the bladder will not withstand the heat of a boiler. Any plumbing supply house should have the type tank you need.
Is the boiler that much hotter than the water in the hot water heater?
 
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Old 09-21-06, 07:58 PM
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Temperature

Water heaters are usually limited to 140-160. A boiler can easily reach 200+.
 
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Old 09-21-06, 08:56 PM
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Thanks for the advice. I'll check with a plumbing supply store tomorrow.
 
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