This pump started life as a drinking fountain refrigerator compressor. I have converted it from compressing Freon to vacuuming air. This setup is so simple it is comical to think of spending $350 for a rattle trap to do the same thing.
Here is what you do:
1. Go to a local refrigerator repair guy and buy a used compressor. I got mine for free.
2. Bolt it to a piece of wood.
3. Wire it up to plug strait into the wall - screw an on/off switch
4. On the ‘suck’ line, attach with a worm clamp a 1 foot section of 1/4” section of vacuum line
5. At the end of that worm clamp on a $3.00 fuel filter (needs to have 1/4” barbs) to prevent epoxy from getting into the pump.
6. Then run another foot of vacuum line to a shutoff valve (optional)
7. ‘T’ into the line a vacuum gauge as show. I got mine from McMaster-Carr for $8.
8. To it attach a 15 foot run of vacuum line. This will give you a ton of placement flexibility.
9. To the pump outlet, attach a cheap filter as shown to prevent oil from spraying out of the pump.
Every once and a while you will want to lube the pump with refrigerant lube that you can get at AutoZone. Also, I run a fan over my pump to keep it from overheating. This probably isn’t a potential problem but they do it on refrigerators so I do too. Eventually I am going to add a fan to the mounting board. This is why it is oversized.
1 Small refrigerator pump
1 12 ft. electrical cord
1 1’x2’ piece of wood
4 small lag bolts to bolt the pump to the wood
1 cheap fuel filter with 1/4” barbs
1 cheap filter to keep the pump from making a mess
1 1/4” NPT female to female shut off valve
1 1/4" NPT male, female, female ‘T’ fitting
1 vacuum only 2” gauge w/ 1/4" NPT male fitting
2 1/4" NPT male to male barb fittings
1 1/4" NPT female to male barb fittings
1 Six pack of your favorite beer to enjoy while watching your $20 pump for 12 strait hours while waiting for your part to cure.