wasps nest in exterior pipe. Pls Help!?

Jen, I'm reasonably sure the pipes are the combustion air intake and exhaust pipe for a high efficiency gas furnace. You can spray the nest on a cool night - the wasps will be sluggish in the cool weather, and will stay on the nest when it's dark out. Get a can of bee / wasp spray - it will discharge a fairly tight stream of insecticide accurately from as far as 10 or 15 feet away. I've walked right up to nests at night without a problem - and I'm not a daredevil by nature. You don't have to worry about fumes getting into the house, because the furnace intake / combustion / exhaust is sealed from the house. Don't go nuts with the spray though - you don't want to have the furnace come on and suddenly have flamethrowing pipes to contend with!

You can put screened covers on the pipes to keep them out; just make sure your furnace can still breathe ;-)

Those pipes let air into your plumbing system. Since air is what allows the system to work, you do not want to block them or cut them off.

I would just get wasp spray and spray it down into the pipe. It takes wasps a while to build a nest - they may not even have started one yet.

Then get a piece of screen (like for a window), put it over the top of the pipe, and secure it with a cable tie. (Thats what I would do, anyway :o))

If you can find the foaming type of was spray it would be better in this situation

Spray it at night or early am …the bees are dossal at those times.

After the bees are gone…………. and you have cleared the nest …………take some screen and wrap it around the hole and secure with a zip tie or clamp….. that will prevent and future nests

You can get Wasp & Hornet killer at wal-mart or a garden shop.The nest clogs up nothing, just don't bother them and they will leave you alone.Then when winter comes you can remove the nest

its probably a sewage vent, just spray a bunch of wasp spray in and get the wasp comb out, wasp stings hurt a lot more then bees and they can sting you a few times so be careful

that wasp spray is high octane mineral spirits & will melt/discolor your roof. I would use a hose end sprayer & liquid laundry soap. It will knock them down & drown them & you can strike from afar. If it is yellow jackets, they will give chase. red wasps just roll over & die, especially in heat. all that are hit with soap will succumb.

its in an out let pipe for my boiler in my back garden

difficult situation. search from a search engine. just that can assist!

I had something inside my high efficiency furnace. It kept going through the start program, the gas jets would light, but the flames kept backing out a bit. Not enought to trip the roll-out switch. The furnace tech could find nothing wrong as it lit up fine when he was here. Next time it failed I had my hand on the exhaust pipe from the top of the furnace to the outside wall. For about 30 seconds when the Combustion Blower came on it felt like BB's or gravel was passing through the pipe. I disconnected the rubber hose from the Pressure Switch, went outside and coupled a leaf eating machine to the exhaust. This sucked out whatever was in there and the furnace has worked perfectly all winter. I did not see or capture what was sucked out. Could have been insects or mice. I did not use the bag on the leaf sucker. I will make this a springtime job for next year. I may plug the exhaust vent over the summer.