Recently I started collecting stand for their experiments. The structure itself is present on the pump b / a washing machine, overage. At the pump, there are extra holes to be plugged.
To verify that temporarily took the cork out of plastic bags, unreliable, and "dumb looks." It is necessary to remodel. Long I scoured the garage in search of a suitable plugs but neither of which is not found.
To my delight in my head I wandered idea - to use the neck of a plastic bottle.
Cut it off from the main body of the bottle. Dress for extra "nipple" pump and produce heat. You can use a hair dryer construction as in my case, temperature of 300 degrees. Or open flame gas burner with care.
When heated, the plastic bottle is trying to acquire the original form. As in the photo.
Respectively decreases and sticking tightly sits on the branch pipe.
After cooling, the compound to compress tightly. Tightness 100%.
I hope the information was useful. Like Bro!