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Old 18-11-2018, 01:34 PM
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tempestwizz (Brian)
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Join Date: Jun 2005
Location: Townsville, Australia
Posts: 211
If you are looking to get that big, the thin steel (or plastic) pipe former filled with concrete is still a more manageable option than a massive pipe: probably way cheaper too! You already have a need for concrete at the site in any case. The flue heat shields through the roof space used in slow combustion heater installations make an excellent lightweight former. Often dirt cheap at recycle yards.
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