Let's see some pictures of home made 2-stages

[marcotoo]

Here you go

[pipefitterdom]

Wow. You are huge!
Balls are like tropical fish, the bigger the tank, the bigger the fish.

[lik2pump]

Instructions please and great results huge pump I use a large plastic jar from wal mart 4" circumstance and approximately 7" long then a fernco PVC reducer ( it is made of rubber) 4" to 3" tapper both inner and outer edges so there no pinching going on

[marcotoo]

Big 2-stage