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Sealing combustion test holes on pvc
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Paul_69
Member Posts: 251
in Gas Heating
what are options for properly sealing combustion test holes on high eff.boilers/furnaces after taking tests in the pvc venting. Seems like most boilers have provisions built in but some do not and condensing furnaces almost never do.
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Comments
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Brass plug will self tapTo learn more about this professional, click here to visit their ad in Find A Contractor.1
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Any thoughts about plastic threaded plugs?0
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You may need to run a tap in before a plastic plug would thread in.ratio said:Any thoughts about plastic threaded plugs?
I've put a stainless steel hose clamp around the hole. The clamp off a 3" no-hub band works well. Maybe note "test port" with a black sharpie for the next tech.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Brass plug will self tap tight enough to seal good?
Thx0 -
I prefer stainless plugs, I've seen too many brass plugs rot away from the condensate.0
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Stainless steel is best!0
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Thx Tim. U need to drill and tsp pvc or will the plug thread in itself0
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I pre drill the hole and then use the stainless steel bolt to tap the PVC.0
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Thx for clearing that up Tim. I think this is the best way. Taking reading of co outside at termination is not as accurate?? What size bolt 1/8?0
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I use 1/2" as it is easier to work with. I also use a little RTV sealant on the threads.0
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Brass plugs will rot through within 2 years. 3/8 plastic threaded plugs with some pipe dope work.0
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Brass plugs will rot through within 2 years. 3/8 plastic threaded plugs with some pipe dope work.0
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