Homemade pump picture

Could somebody please post a picture of a homemade pump, so I can see is I connected my mityvac to my gravel cleaner right. I seem to be losing pressure and have to keep repumping.

Be sure to seal the hose to the top of the gravel tube with silicone or other glue filler, that is where my air loss occured. Good luck. Bert

Try spraying or dripping water/soapy water on your fittings while you pump. I they are leaking, you will see the seepage. Otherwise, the tube might be leaking at the base of your cock. Have you shaved that area? What type of lube do you use?