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What do I do with the plastic "flapper" plugs inside the inlet and outlet nipples on my new waterheater, model 153.318132?

My assumption is that they come out because they would create a pressure drop through the water heater, however the design is so detailed, being made up of sleeves, orings, flapper valves etc, that it does not look like an ordinary cleanliness plug.

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2 Answers from these members:
afritz afritz
An expert shall have a response for you within 24 to 48 hours. Have a wonderful New Years.
by afritz afritz Earned 36,383 community points in Appliances
December 31st, 2010
Answered in 6 minutes
0 votes
scott d
I can understand your concern. The flaps inside the nipples are heat traps. Heat traps prevent heat loss through the inlet and outlet pipes. The heat trap's design prevents this heat loss and helps make the water heater more energy efficient, while allowing proper flow when the heater is in use. You can remove the flappers by knocking them out or getting some nipples that do not have the flappers. I do however recommend using these nipples. I hope this helps you. Thank you for using Manage My life.
by scott d Earned 139,392 community points in Appliances
January 3rd, 2011
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