- Sep 23, 2019
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How long have you had this set up going? What issues have you had?So at the top of the T fitting where i have that barb (I couldn't find a CAD file for a Mur-loc fitting) is where you dose the slurry from your dosing pump. How much is based on your alk demand and the concentration you are running. I have developed a calculator for that. On the right hand side is your water line in that would be coming from your sump, either via a dedicated pump or plumbed into an existing manifold. I've tested this with a pump rated at 260gph, more or less may work. You can also plumb an inline valve to help with flow control if you need it.
The 3d insert will create a turbulent venturi effect that will help prevent pooling at the dosing point and encourage mixing. The left hand side of course is your return to sump point and note that it is larger. The input is 1/2" and the output is 3/4", this must be maintained based on the fluid dynamic principles of how a venturi basically works. A higher flow transitioning to a lower flow at a point of constriction.
Now, you can find devices like this out there pre-made but they are expensive when you try to find ones that conform to NPT standards. Almost all of the more affordable ($12-$20) ones are built to the BSP standard and good luck converting those threads economically. They also tend to be very small at that price range and lack the volume throughput. This setup can be had from any local hardware store for around $10 or less assuming you have access to a printer for the added piece.