Brass splitter, prior to RODI question

Redn0va7 · Oct 25, 2025

Hello, I have 2 well established reef tanks and I use my own rodi in the laundry room to help make my own water (see picture). I noticed that the connector/splitter leading into the rodi has a blue substance on it from possible corrosion... and I'm wondering if I should replace it with the same type or connector or get a new type of material for the connector (if that's even an option, I can't seem to find a similar pvc connector and I'm honestly not trusting of plastic... I'm afraid it might fail and flood the house).

Edit: The connector/splitter I currently have is brass, and I know brass has copper... I just thought that since it was before the rodi it was fine because most pipes in houses are copper based. I've had no major issues with the both tanks, except maybe a random hammer head bleaching oncea year. I've had this rodi setup for 3 years and my reef tank for 5 years.

Randy Holmes-Farley · Oct 25, 2025

Should be fine. Most people have copper pipes and the ro/di does the job.

BryanM · Oct 25, 2025

Agreed, and I have brass feeding my rodi setup w/o issue.

UncommonSense · Oct 25, 2025

This is a garden hose splitter!

It uses hose threads, which differ from National Pipe Thread (NPT) primarily in that it doesn’t taper in diameter, and does require a rubber o-ring or gasket to make a seal!

There are hose thread to pipe thread adapters in every permutation of male/female threads, but that’s only necessary if you choose to adapt this to actual pipe threaded fittings in the future!

— these garden hose wyes have a ball valve on each port, these ball valves have a rubber seal around the stem leading to the valve “handle”… it looks like yours might be starting to weep water, causing the corrosion!

—this wye is a cheap replacement part, but for now, you can rest easy knowing it isn’t going to randomly burst! — it’s a slow leak at worst!