I'm getting the impression that it might be wet at the bottom, or that you suspect moisture. If that's the case, then it could be a few things working against you.
One, check the bottom of the chamber. I don't know anything about Petes, but check to see if the small hole in the bottom of the chamber is at the absolute bottom of the chamber or slightly above it. The Danish style of pipes on bents is to make a small dip below the draw hole, so that moisture will go down into the bottom and free up the draw so that it doesn't gurgle. Nording even sells stones to raise the bottom so that you can smoke all of the tobacco without loosing some to the wetness that pools below these stones. If this is the case with your pipe, then that is just the way of things. You can raise the bottom with mud, but then you'll eventually gurgle. I am in the camp that says that we have the word "dottle" for a reason. If we have a word for it, then it's just ok to leave a bit to be so called.
OK, now what causes moisture in the chamber. Some say that drying the tobacco helps. I am pretty sure that wet tobacco will have the moisture forced out by the fire, into steam that will go up mostly. Very little of this steam will actually go up the draft and then stem, because it will dry as the heat from the fire creeps towards the fresh un burnt tobacco. Sure, some will go into the stem, but this isn't the main source of the moisture in the stem.
There is a specific reaction that occurs in combustion that merges the oxygen to the hydrogen, creating steam as the bi-product of combustion. Even if the tobacco is completely dry, water is formed when it's burned. This is basic chemistry. This steam is completely normal. However, the trick is preventing it from condensing in the stem. Condensing is an unavoidable aspect of the chemistry of smoking also. It works in air conditioning to create cool air, as well as in making alcohol (ever see a moonshine still with those long copper coils?).
The trick is not to force the smoke too fast through the stem. Straight pipes gurgle less than bents, because the smoke moves more easily and unobstructed through the stem. In a bent, you have to smoke even slower. When the smoke is forced, it cools along the inner walls and drips down. If you draw very very slowly, maybe even just let the smoke trickle into your mouth without drawing at all, you'll prevent the moisture from being reduced from the smoke. If it is cold outside, the problem is multiplied. Moonshiners make more potent alcohol by cooling the coils in small mountain streams. Cool air on a pipe does the same thing.
My suggestion is to learn to clench. I do this by not ever drawing on the stem after I get it lit. Just allow the pipe to smoke itself. Some say that as you breath deeply through your nose it makes your mouth gullet and slowly, gently draw in some smoke, and then just let it drift out on its own. I never blow out smoke. Growing up pipe men just never made smoke. Their pipes just hung on their pis and the smoke was minimal. This is just how I learned to do it. In fact if we ever saw someone making a lot of smoke we just thought that they were kids playing with pipes, lol. But, there is no one right and wrong. And, there ain't nothing wrong with playing. Just sayin'.
Another idea is if you just have to have a bent pipe, try a dry-system pipe, so that the moisture will get trapped into the well drilled into the stummel. The biggest drawback on this style is that if you ever tip the pipe, that nasty water will fill your bowl anyways.
OK, I've written a novel, lol. Sorry, my 2 cents buys a lot of words, ha ha!!
Happy smoking...