Easy $5 Water Guns

Step 4: Piston squeegee

The washers are screwed into place at the end of the piston, as shown. I wrapped the screw with teflon tape.

Comments

[superjoe12]

I did everything you said but I dont get how the finished piston is supposed to fit into the barrel with the 1 and 1/2 inch rubber washer being too big for the 1 and 1/4 inch pipe

[seamster]

The washer sort of folds down as you push the piston into the barrel. The fact that it's just a little bit bigger than the inside of the barrel is what creates a water tight seal. You will need to put some sort of lubricant in the inside of the barrel (like vaseline) to make it work properly. Let me know if you have any more trouble. I'll try and help if I can.

[superjoe12]

This still doesn't work for me after using vaseline. The piston just wont fit into the barrel because the rubber washer is too big. Should I use a 1 and 1/4 inch rubber washer instead?

[seamster]

Can you take a clear photo of the piston end along with opening of the barrel for me? Post it here, and I'll see if that gives me a better idea of what the problem could be.

[partymonsta]

oh mines way to small. i was wondering why u shaved it. lol

[partymonsta]

my plug dosent fit snug it dosent even touch it. can u help or is that normal?

[seamster]

If it's too small you'll have to buy a bigger size.

[partymonsta]

ok. but does yours fit tight?

[seamster]

If we're talking about the plug that goes in the end of the piston--yes, it fits extremely tight. It's actually too big to begin with. That's why I have to shave them down as I show in step 3.