OK, so in going with pumps in our system, we decided on these:
Sure, you can get them on eBay, but most sellers are in China. Who wants to wait 2-4 weeks? Amazon has them with Prime Shipping and for only a couple dollars more.
These are food grade and rated for high temps (100 degrees Celsius or 212 degrees Fahrenheit). Instead of an inline head design, these have a center inlet and a top outlet which is supposed to be a more efficient pump design. The threads are 1/2″ BSP, which is essentially the same as 1/2″ NPT without the tapered end.
The mounting plate has four rubber grommets to help eliminate noise.
Just for size comparison, Here’s the pump next to a standard 3-piece airlock. These suckers are tiny!
Stainless Quick Disconnects from BargainFittings.com.
Since Bargain Fittings offers flat rate shipping for $5.00, it makes sense to plan ahead and order all the fittings you will need for all of your projects.
ALWAYS use teflon tape. Four wraps with the white tape seems to do the job.
Only tighten hand tight. You do not want to over tighten and snap the plastic connection off. Notice how front heavy the pump is with the quick disconnects. This will definitely have to be mounted to a base.
Next, add a length of wire to reach your pump controller. Solder the joints and use heat shrink to shield the connection.
Solder the male connection for the DC Jack. This is the connector we went with to go with the Pump Controller:
$49.23 for this solution and it’s a part of a larger modular solution. I’m excited for this. Of course, the cost of the DC Jack Connectors will be spread across all pumps and other projects, as you will see.