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Old 09-18-2012, 09:47 AM   #1
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Mud dauber wasps in the HW vent area

Anyone have problems with mud dauber wasps building nests in the vent area around the HW tank? I have a mesh screen over the furnace vent, but the HW tank area has too many openings too secure it 100% against an invasion of mud daubers.
I had several start nests in there and cured the problem with just a 4" strip of dog flea/tick collar placed in the bottom of the area by the HW tank drain valve. It has lasted all season!
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2012 Crusader 290RLT TE, TrailAir flex pin: 2012 Toyota Tundra 5.7 SR5 Dbl cab 4X2 Tow, 4.30 gears, RideRite air, TRD cold-air induction & dual exhaust: Reese 16K Slider: TST tpms
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Old 09-18-2012, 10:01 AM   #2
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Originally Posted by J_KHawthorne View Post
Anyone have problems with mud dauber wasps building nests in the vent area around the HW tank? I have a mesh screen over the furnace vent, but the HW tank area has too many openings too secure it 100% against an invasion of mud daubers.
I had several start nests in there and cured the problem with just a 4" strip of dog flea/tick collar placed in the bottom of the area by the HW tank drain valve. It has lasted all season!
Get some alum screen wire and cover the inside of the wh door and secure with the alum tape. Just make sure it is alum or steel screen wire, not the plastic.
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Old 09-18-2012, 10:05 AM   #3
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Originally Posted by dunnnc View Post
Get some alum screen wire and cover the inside of the wh door and secure with the alum tape. Just make sure it is alum or steel screen wire, not the plastic.
I had that hardware-cloth screen in place just like in your photo also, but those wasps found their way inside around the door edges and even in through the latch!!! I was sure that the screen would be enough, but the mud daubers got past it!

The little strip of flea collar has been 100% effective... I just have to remember to replace it yearly, and that just might be a problem!
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Jim & Kathy

2012 Crusader 290RLT TE, TrailAir flex pin: 2012 Toyota Tundra 5.7 SR5 Dbl cab 4X2 Tow, 4.30 gears, RideRite air, TRD cold-air induction & dual exhaust: Reese 16K Slider: TST tpms
Miles towed to date: 18,950 Nights camped 192
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Old 09-18-2012, 10:39 AM   #4
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I had that hardware-cloth screen in place just like in your photo also, but those wasps found their way inside around the door edges and even in through the latch!!! I was sure that the screen would be enough, but the mud daubers got past it!

The little strip of flea collar has been 100% effective... I just have to remember to replace it yearly, and that just might be a problem!
The only place the critters can come in is at the bottom around the hinge. Cut a pc of screen and attach it to the frame and tape it to the door and cover that opening or just make a screen to fit inside the wh housing flange.

Another idea is to add a sponge weather strip along the bottom of the door to seal the hinge area against the housing.

As for the latch, remove the spring loaded latch and put a metal disc (large enough to cover the hole in the door) under the latch & in front of the metal angle that holds the mechanism
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