Plumbing help

[Wildreefs]

I recently got an aqua uv sl 100 uv light. The input and output both have 3 inch unions on them. I want to step this down to one inch.

Went to Home Depot, the only adapters I saw that go from 3 inch to 2 inch were called pvc/dwv. From there I can use a 2 inch to 1 inch threaded fitting for a 1 inch barb.

I don’t believe this dwv fitting is good for tank, or is it? If not, where can I find 3 inch fittings that are pvc?

The pvc there’s at Home Depot goes up to 2 inch before going into that dwv category.

Thank

 

[mann1139]

Does 1in provide enough flow for the UV?

Usually the mfgr will tell you the minimum recommended flow. You are cutting the flow by almost 90% by stepping down that far.

 

[Bruttall]

Try these, keep in mind the 3inch side is INSIDE SLIP, the 1inch should be outside slip. And yes this will reduce flow potential by a lot, but the Dwell Time is what is important with a UV depending on what you are using the UV for, Longer dwell times are needed for Ick/velvet vs algae.

https://www.pvcfittingsonline.com/3-x-1-sch-40-pvc-reducer-coupling-soc-429-335.html